6.1: open workbooks from your own sources and streams, managed inflate, leaner typed parse by GabrielMarquezMatte · Pull Request #140 · GabrielMarquezMatte/ExcelReader

GabrielMarquezMatte · 2026-10-08T20:10:33Z

What does this change?

Everything on develop since v6.0.0, as the candidate for 6.1.0. Two features and two performance
changes, with no change to the .NET public API and only additions to the C ABI (XL_ABI_VERSION stays 6).

Open a workbook from your own bytes

Core: a workbook can be read from any byte source through a seekable view, with the source
fetched in blocks and each block fetched once (57dc08c, fcb2605).
C ABI: xl_open_source (random access through a read_at callback) and xl_open_stream
(a forward-only stream that cannot seek), plus xl_set_source_error so a callback can report why
it failed. xl_open_options gains source and buffering fields and still accepts the 6.0 layout
through struct_size.
Bindings: Python takes a Source or any readable stream, C++ an xl::Source or
xl::InputStream, Rust a Source or any Read. Documented in each binding's README.
CSV over a stream: schema inference and replay now work when the input cannot seek
(ReplayStream).
Python Arrow stream: native callbacks release the GIL, so a consumer holding it no longer
blocks other threads while a batch parses.

Managed inflate decoder

System.IO.Compression.DeflateStream is replaced at all four sites in ZipIndex by InflateStream,
a managed, resumable port of libdeflate's decoder design (MIT notice added to
THIRD-PARTY-NOTICES.md, which now ships in the NuGet package).

Inflate only, against DeflateStream: about 1.7x on the XLSX sheet and 1.4x on the XLSB sheet,
after a fast-loop pass guided by the JIT disassembly (one table array instead of two, removing a
register spill; libdeflate-style bit accounting).
End to end without prefetch: XLSX reads about 1.25x, XLSB about 1.14x (measured before the
fast-loop pass; the gain with prefetch is smaller because the parse becomes the bottleneck).
Hardening: an always-on canary after the output window, exact bit-level truncation detection, a new
inflate fuzz target that compares output with DeflateStream, and an oracle fix so divergences
and canary trips are no longer swallowed by FuzzOracle.Guard.

Behavior change. DeflateStream accepts a deflate stream that ends before its final block and
returns the bytes decoded so far. A ZIP entry cut short therefore used to yield a silent prefix of
its rows. It now throws InvalidDataException. Worth a line in the release notes.

Typed parse builds columns in native memory

ColumnBuilder used to write into 32 KB managed chunks and then copy everything into the native
block it returns. It now writes into a native block that grows by doubling, and a column built in one
part hands that block over without a copy. A SafeHandle owns each block, so a builder dropped on an
error path still frees it.

Peak memory during to_record_batch on the 65K fixture: 26.0 → 18.1 MiB whole sheet,
16.7 → 10.7 MiB streamed.
Typed parsing 3–5% faster.

Also

Static PGO profile regenerated twice, after each signature change, so NativeAOT keeps profile data
for the decode loop and the column builders.
docs/performance/reader-performance.md: inflate measurements, and a correction of the earlier
"the inflate floor does not move" claim.
Dependabot bumps (test and analyzer groups).

Checklist

dotnet build ExcelReader.slnx --configuration Release builds clean (warnings are errors)
dotnet test tests/ExcelReader.Tests/ExcelReader.Tests.csproj --configuration Release passes (2,990 tests)
If this changes the public API: PublicAPI.Unshipped.txt updated (no .NET public API change since v6.0.0)
Tests added/updated for the behavior change
One focused change: no, this is the release PR from develop

Test plan

Full .NET suite: 2,990 passed. Python suite against the republished NativeAOT library: 158 passed,
1 pre-existing xfail.
Inflate: unit tests for every rejection path (crafted stored, fixed and dynamic headers, matches at
the full 32,768-byte distance, cuts just before the window fills), differential tests against
DeflateStream over generated shapes at every compression level and over every deflated entry in
the test workbooks, and fuzz check with 156,780 cases and 0 failures.
Native buffers: GrowableNativeBufferTests, plus the existing allocation-tracking tests, which still
pass through the copy path.
All performance numbers above come from an i7-1365U laptop with interleaved A/B runs, so only the
ratios are meaningful.

Before tagging 6.1.0:

BenchmarkDotNet on the Ryzen 7 5700X: no row regresses, and the tiny workbook (0.198 ms) does not
get slower (each ZIP entry now rents buffers and builds Huffman tables).
NativeAOT xl_parse_typed before and after.
A few CI fuzz cycles on the new inflate target.
Update benchmarks.md and the Python README figures from the Ryzen run.

…-api-v6.0.0 chore: promote public API for v6.0.0

…hreading support

…lReader into develop

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

… 6.0 options layout Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ard stream reads Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Python callbacks now catch BaseException so Ctrl-C fails the read instead of truncating a CSV stream. C++ open_source rejects a size above INT64_MAX before releasing the source, and the C++ tests cover destruction on failure, parallel reads and stream errors. The smoke test pins the 88-byte 6.0 options struct. Source error wording no longer claims 0 is valid, StreamBuffer clamps its limit to Array.MaxLength, and the header, docstring and READMEs are tightened. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…lay functionality

Bumps Meziantou.Analyzer from 3.0.290 to 3.0.294 --- updated-dependencies: - dependency-name: Meziantou.Analyzer dependency-version: 3.0.294 dependency-type: direct:production update-type: version-update:semver-patch dependency-group: analyzers ... Signed-off-by: dependabot[bot] <support@github.com>

Bumps Microsoft.Testing.Extensions.CodeCoverage from 18.11.2 to 18.12.0 Bumps Microsoft.Testing.Extensions.TrxReport from 2.4.1 to 2.5.1 --- updated-dependencies: - dependency-name: Microsoft.Testing.Extensions.CodeCoverage dependency-version: 18.12.0 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: test - dependency-name: Microsoft.Testing.Extensions.TrxReport dependency-version: 2.5.1 dependency-type: direct:production update-type: version-update:semver-minor dependency-group: test ... Signed-off-by: dependabot[bot] <support@github.com>

…elop/analyzers-55e46a7a66 Bump the analyzers group with 1 update

…ts/ExcelReader.Tests/develop/test-4352e14058 Bump the test group with 2 updates

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Replaces DeflateStream at all four sites in ZipIndex. A deflate entry that ends before its final block now throws InvalidDataException; DeflateStream returned the bytes decoded so far and reported end of stream. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…oded bytes When input had ended and the window filled while the fast loop was decoding the zero padding, the decoder reported a full window instead of truncation, so up to a few hundred invented bytes reached the caller before the exception. Also pins matches at the full 32,768-byte distance. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Both threw InvalidOperationException, which FuzzOracle sanctions, so Guard swallowed them. Divergence now throws OracleDivergenceException and the canary UnreachableException; a smoke self-check proves Guard lets a divergence through. When InflateStream rejects input, the bytes it delivered first must be a prefix of DeflateStream's output. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Keeps the litlen and offset tables in one array so the offset table is a constant displacement, which removes a register spill on every match. Tracks bitsleft as a long whose low byte alone is meaningful, subtracting whole entries and refilling with 7 - (bitsleft >> 3) as libdeflate does, and drops a redundant mask before the extra-bits shift. Inflate only, interleaved on the i7-1365U: 1.10x on the XLSX sheet, 1.07x on the XLSB sheet. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…t-loop change FastLoop lost a parameter, so the previous profile no longer matched it by signature. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…lReader into develop

… without a copy ColumnBuilder wrote every value into 32 KB managed chunks and then copied them all into the native block it returned. It now writes into a native block that doubles as it fills; a column built in one part hands that block over directly, and only the parallel CSV path, or a test tracking allocations, still copies. A SafeHandle owns each block so a builder dropped on an error path still frees it. On the 65K fixture the peak during to_record_batch falls from 26.0 to 18.1 MiB (10.7 MiB from 16.7 when streamed); typed parsing is 3-5% faster on the i7-1365U. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…mn buffers ColumnBuilder.Append and Concat changed signature, so the previous profile no longer matched them. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

codecov-commenter · 2026-10-08T20:19:10Z

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 90.97826% with 83 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.02%. Comparing base (ca5b50f) to head (4aa3766).

Files with missing lines	Patch %	Lines
...rc/ExcelReader.Core/Reader/Sources/SourceStream.cs	62.16%	13 Missing and 1 partial ⚠️
src/ExcelReader.Core/Reader/Csv/ReplayStream.cs	75.92%	12 Missing and 1 partial ⚠️
...celReader.Core/Reader/Zip/Inflate/InflateStream.cs	86.36%	11 Missing and 1 partial ⚠️
...c/ExcelReader.Native/Reading/CallbackReadStream.cs	74.46%	11 Missing and 1 partial ⚠️
src/ExcelReader.Native/Reading/ReadApi.Sources.cs	78.00%	8 Missing and 3 partials ⚠️
...Core/Reader/Zip/Inflate/InflateDecoder.FastLoop.cs	94.65%	2 Missing and 5 partials ⚠️
...c/ExcelReader.Native/Reading/CallbackByteSource.cs	87.09%	3 Missing and 1 partial ⚠️
src/ExcelReader.Core/Reader/Csv/CsvReader.cs	72.72%	3 Missing ⚠️
...xcelReader.Core/Reader/Sources/CachedByteSource.cs	96.15%	2 Missing ⚠️
...elReader.Core/Reader/Zip/Inflate/InflateDecoder.cs	98.75%	1 Missing and 1 partial ⚠️
... and 2 more
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #140      +/-   ##
==========================================
+ Coverage   90.00%   90.02%   +0.02%     
==========================================
  Files         190      204      +14     
  Lines       13963    14849     +886     
  Branches     2558     2711     +153     
==========================================
+ Hits        12567    13368     +801     
- Misses        936     1004      +68     
- Partials      460      477      +17

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github-actions · 2026-10-08T20:25:09Z

Benchmark Results

Baseline: master ca5b50f9, from the series published by benchmark-pages.yml. Both sides ran on a shared ubuntu-latest runner, so treat anything under ±10% as noise.

Moved by at least 10%

Benchmark	master	This PR	Delta
`ExcelReader.Benchmarks.ReadBenchmark.Sylvan(Rows: 50000)`	39.93 ms	57.97 ms	+45.2%
`ExcelReader.Benchmarks.CsvReadBenchmark.Sylvan(Rows: 50000)`	3.82 ms	5.40 ms	+41.5%
`ExcelReader.Benchmarks.ColdStartBenchmark.FluentParseFirstUse(Rows: 200)`	37.08 ms	51.94 ms	+40.1%
`ExcelReader.Benchmarks.XlsReadBenchmark.ExcelReader(Rows: 50000)`	3.53 ms	4.92 ms	+39.4%
`ExcelReader.Benchmarks.ColdStartBenchmark.TypedParseFirstUse(Rows: 200)`	42.30 ms	58.91 ms	+39.3%
`ExcelReader.Benchmarks.CsvReadBenchmark.ExcelReaderAsync(Rows: 50000)`	2.73 ms	3.78 ms	+38.3%
`ExcelReader.Benchmarks.ColdStartBenchmark.FluentParseWithAttributeFallbackFirstUse(Rows: 200)`	45.64 ms	62.09 ms	+36.0%
`ExcelReader.Benchmarks.CsvReadBenchmark.ExcelReader(Rows: 50000)`	2.71 ms	3.69 ms	+36.0%
`ExcelReader.Benchmarks.XlsReadBenchmark.Sylvan(Rows: 50000)`	5.77 ms	7.83 ms	+35.8%
`ExcelReader.Benchmarks.ReadBenchmark.OfficeIMO(Rows: 50000)`	130.09 ms	176.23 ms	+35.5%
`ExcelReader.Benchmarks.CsvReadBenchmark.Sep(Rows: 50000)`	8.71 ms	11.72 ms	+34.5%
`ExcelReader.Benchmarks.XlsReadBenchmark.ExcelReaderAsync(Rows: 50000)`	3.47 ms	4.57 ms	+31.8%
`ExcelReader.Benchmarks.CsvReadBenchmark.ExcelReaderWide(Rows: 50000)`	9.23 ms	11.95 ms	+29.4%
`ExcelReader.Benchmarks.ReadBenchmark.ExcelReaderMaterialized(Rows: 50000)`	9.95 ms	12.75 ms	+28.1%
`ExcelReader.Benchmarks.XlsReadBenchmark.OfficeIMO(Rows: 50000)`	7.98 ms	10.20 ms	+27.9%
`ExcelReader.Benchmarks.ReadBenchmark.ExcelReaderAsync(Rows: 50000)`	9.04 ms	11.44 ms	+26.6%
`ExcelReader.Benchmarks.ReadBenchmark.OfficeIMOXlsb(Rows: 50000)`	12.72 ms	16.00 ms	+25.9%
`ExcelReader.Benchmarks.ReadBenchmark.ExcelReader(Rows: 50000)`	8.61 ms	10.76 ms	+25.0%
`ExcelReader.Benchmarks.ColdStartBenchmark.RecordWriteFirstUse(Rows: 200)`	22.45 ms	25.22 ms	+12.4%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.IndexParse_Utf8Parser(Rows: 65536)`	3.06 ms	2.74 ms	-10.3%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsm_ExcelReader_Materialized`	62.47 ms	55.97 ms	-10.4%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsb_ExcelReader`	29.31 ms	26.17 ms	-10.7%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsb_Sylvan(Rows: 65536)`	98.14 ms	87.56 ms	-10.8%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsx_ExcelReader`	59.51 ms	52.33 ms	-12.1%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsx_ExcelReader_Memory`	60.29 ms	52.97 ms	-12.1%
`ExcelReader.Benchmarks.RealDataTypedParseBenchmark.Xlsb_ExcelParser`	39.60 ms	34.75 ms	-12.3%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsm_ExcelReader`	59.65 ms	52.33 ms	-12.3%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsb_ExcelReader_Memory_Prefetch`	17.29 ms	15.14 ms	-12.4%
`ExcelReader.Benchmarks.NativeTypedParseBenchmark.ParseTyped`	53.00 ms	46.30 ms	-12.6%
`ExcelReader.Benchmarks.ChunkedParseBenchmark.Batched_10k(Rows: 50000)`	13.43 ms	11.70 ms	-12.9%
`ExcelReader.Benchmarks.RealDataReadBenchmark.Xlsb_ExcelReader_Prefetch`	17.70 ms	15.40 ms	-13.0%
`ExcelReader.Benchmarks.NativeTypedParseBenchmark.ParseArrow`	50.74 ms	43.13 ms	-15.0%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsx_ExcelReader_Materialized(Rows: 65536)`	94.04 ms	79.66 ms	-15.3%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsb_ExcelReader_Materialized(Rows: 65536)`	80.87 ms	68.00 ms	-15.9%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsx_ExcelReader_Materialized_Interned(Rows: 65536)`	94.67 ms	79.58 ms	-15.9%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.Stored_EndToEnd(Rows: 65536)`	28.56 ms	23.80 ms	-16.7%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.Stored_SharedStringPrologue(Rows: 65536)`	6.32 ms	4.94 ms	-21.8%
`ExcelReader.Benchmarks.ArrowConversionBenchmark.XlsbTyped(Rows: 100000)`	21.64 ms	16.21 ms	-25.1%
`ExcelReader.Benchmarks.ArrowConversionBenchmark.CsvAllString(Rows: 100000)`	29.10 ms	21.67 ms	-25.5%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.IndexParse_DigitLoop(Rows: 65536)`	2.23 ms	1.63 ms	-26.8%
`ExcelReader.Benchmarks.ArrowConversionBenchmark.CsvTyped(Rows: 100000)`	16.00 ms	11.60 ms	-27.5%
`ExcelReader.Benchmarks.ArrowConversionBenchmark.CsvTypedWithInference(Rows: 100000)`	16.84 ms	11.98 ms	-28.9%
`ExcelReader.Benchmarks.DataReaderBenchmark.DataReader_TypedGetters(Rows: 50000)`	14.16 ms	10.05 ms	-29.0%
`ExcelReader.Benchmarks.DataReaderBenchmark.DataReader_GetValue(Rows: 50000)`	15.08 ms	10.61 ms	-29.7%
`ExcelReader.Benchmarks.DataReaderBenchmark.DataTable_Load(Rows: 50000)`	76.83 ms	53.49 ms	-30.4%
`ExcelReader.Benchmarks.DataReaderBenchmark.DataReader_GetBytes(Rows: 50000)`	11.16 ms	7.74 ms	-30.7%
`ExcelReader.Benchmarks.DataReaderBenchmark.Baseline_RawRows(Rows: 50000)`	11.20 ms	7.67 ms	-31.5%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsx_ExcelReader_Prefetch(Rows: 65536)`	48.97 ms	33.04 ms	-32.5%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.EndToEnd_Prefetch(Rows: 65536)`	50.63 ms	33.32 ms	-34.2%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsb_ExcelReader(Rows: 65536)`	58.46 ms	37.99 ms	-35.0%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsb_ExcelReader_Memory(Rows: 65536)`	57.64 ms	36.66 ms	-36.4%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.EndToEnd(Rows: 65536)`	66.53 ms	42.13 ms	-36.7%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsx_ExcelReader(Rows: 65536)`	66.97 ms	42.30 ms	-36.8%
`ExcelReader.Benchmarks.StringHeavyReadBenchmark.Xlsb_ExcelReader_Prefetch(Rows: 65536)`	47.66 ms	26.33 ms	-44.8%
`ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark.SharedStringPrologue(Rows: 65536)`	25.09 ms	13.22 ms	-47.3%

104 within ±10%, 38 with no baseline entry (new, renamed, or reparameterized).

Full results per group

ExcelReader.Benchmarks.ArrowConversionBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
INTEL XEON PLATINUM 8573C 2.30GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
CsvAllString	100000	21.67 ms	0.924 ms	0.240 ms	1.00	0.01	531.2500	531.2500	531.2500	16.27 MB	1.00
CsvTyped	100000	11.60 ms	1.334 ms	0.347 ms	0.54	0.02	453.1250	453.1250	453.1250	8.13 MB	0.50
XlsbTyped	100000	16.21 ms	1.404 ms	0.365 ms	0.75	0.02	375.0000	375.0000	375.0000	8.14 MB	0.50
CsvTypedWithInference	100000	11.98 ms	1.621 ms	0.421 ms	0.55	0.02	578.1250	578.1250	578.1250	14.89 MB	0.92

ExcelReader.Benchmarks.ChunkedParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Allocated	Alloc Ratio
WholeSheet	50000	12.56 ms	1.923 ms	0.499 ms	1.00	0.05	9.81 KB	1.00
Batched_10k	50000	11.70 ms	0.095 ms	0.025 ms	0.93	0.03	16.75 KB	1.71
Batched_1k	50000	12.21 ms	0.097 ms	0.015 ms	0.97	0.04	81.09 KB	8.27

ExcelReader.Benchmarks.ColdStartBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-GOEFXF : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

InvocationCount=1  IterationCount=1  LaunchCount=16  
RunStrategy=ColdStart  UnrollFactor=1  WarmupCount=0

Method	Rows	Mean	Error	StdDev	Allocated
TypedParseFirstUse	200	58.91 ms	2.244 ms	2.204 ms	20.78 KB
RecordWriteFirstUse	200	25.22 ms	0.443 ms	0.435 ms	84.25 KB
FluentParseFirstUse	200	51.94 ms	0.539 ms	0.529 ms	23.3 KB
FluentParseWithAttributeFallbackFirstUse	200	62.09 ms	2.039 ms	2.003 ms	25 KB

ExcelReader.Benchmarks.CsvParallelParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Dop	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
ConversionHeavy	1	1,497.7 ms	200.79 ms	52.14 ms	1.00	0.04	42000.0000	-	671.38 MB	1.000
NarrowInt	1	814.4 ms	222.90 ms	34.49 ms	0.54	0.03	15000.0000	-	245.7 MB	0.366
ConversionHeavyAggregate	1	1,175.7 ms	134.41 ms	34.91 ms	0.79	0.03	-	-	1.17 MB	0.002
NarrowIntAggregate	1	748.4 ms	189.16 ms	49.12 ms	0.50	0.03	-	-	1.22 MB	0.002

ConversionHeavy	2	1,166.2 ms	84.33 ms	21.90 ms	1.00	0.02	42000.0000	27000.0000	678.74 MB	1.000
NarrowInt	2	729.3 ms	35.44 ms	9.20 ms	0.63	0.01	15000.0000	2000.0000	253.17 MB	0.373
ConversionHeavyAggregate	2	823.4 ms	70.30 ms	18.26 ms	0.71	0.02	-	-	1.27 MB	0.002
NarrowIntAggregate	2	527.8 ms	41.72 ms	6.46 ms	0.45	0.01	-	-	1.25 MB	0.002

ConversionHeavy	4	740.2 ms	22.70 ms	3.51 ms	1.00	0.01	42000.0000	38000.0000	678.87 MB	1.000
NarrowInt	4	483.0 ms	30.76 ms	7.99 ms	0.65	0.01	15000.0000	1000.0000	253.32 MB	0.373
ConversionHeavyAggregate	4	506.3 ms	38.61 ms	5.98 ms	0.68	0.01	-	-	1.27 MB	0.002
NarrowIntAggregate	4	326.4 ms	46.35 ms	12.04 ms	0.44	0.02	-	-	1.27 MB	0.002

ConversionHeavy	8	788.1 ms	64.83 ms	16.84 ms	1.00	0.03	42000.0000	17000.0000	678.97 MB	1.000
NarrowInt	8	482.8 ms	46.46 ms	12.07 ms	0.61	0.02	15000.0000	1000.0000	253.28 MB	0.373
ConversionHeavyAggregate	8	503.5 ms	26.80 ms	6.96 ms	0.64	0.02	-	-	1.29 MB	0.002
NarrowIntAggregate	8	327.1 ms	72.17 ms	18.74 ms	0.42	0.02	-	-	1.29 MB	0.002

ConversionHeavy	16	763.3 ms	78.49 ms	20.38 ms	1.00	0.03	42000.0000	1000.0000	679.3 MB	1.000
NarrowInt	16	480.2 ms	7.62 ms	1.18 ms	0.63	0.02	15000.0000	1000.0000	254.14 MB	0.374
ConversionHeavyAggregate	16	541.9 ms	49.03 ms	12.73 ms	0.71	0.02	-	-	1.33 MB	0.002
NarrowIntAggregate	16	320.2 ms	32.79 ms	5.07 ms	0.42	0.01	-	-	1.33 MB	0.002

ExcelReader.Benchmarks.CsvParallelVsSepBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Corpus	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
ExcelReader_Sequential	NarrowInt	712.4 ms	13.32 ms	2.06 ms	1.00	0.00	15000.0000	-	-	244.15 MB	1.00
ExcelReader_Parallel	NarrowInt	481.8 ms	78.60 ms	20.41 ms	0.68	0.03	15000.0000	1000.0000	-	253.32 MB	1.04
Sep_Sequential	NarrowInt	595.5 ms	4.23 ms	1.10 ms	0.84	0.00	15000.0000	-	-	244.15 MB	1.00
Sep_Parallel	NarrowInt	467.7 ms	131.89 ms	20.41 ms	0.66	0.03	17000.0000	13000.0000	1000.0000	256.08 MB	1.05

ExcelReader_Sequential	ConversionHeavy	941.8 ms	11.84 ms	3.07 ms	1.00	0.00	29000.0000	-	-	467.31 MB	1.00
ExcelReader_Parallel	ConversionHeavy	522.4 ms	21.99 ms	5.71 ms	0.55	0.01	29000.0000	25000.0000	-	473.71 MB	1.01
Sep_Sequential	ConversionHeavy	1,149.4 ms	31.27 ms	8.12 ms	1.22	0.01	29000.0000	-	-	467.31 MB	1.00
Sep_Parallel	ConversionHeavy	834.5 ms	80.70 ms	20.96 ms	0.89	0.02	33000.0000	31000.0000	4000.0000	475.64 MB	1.02

ExcelReader.Benchmarks.CsvParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	Gen0	Gen1	Allocated	Alloc Ratio
ExcelParserSync	50000	6.911 ms	0.0580 ms	0.0090 ms	1.00	242.1875	-	3.86 MB	1.00
ExcelParserAsync	50000	7.326 ms	0.0569 ms	0.0088 ms	1.06	242.1875	-	3.86 MB	1.00
Sep	50000	14.716 ms	0.0474 ms	0.0123 ms	2.13	234.3750	-	3.87 MB	1.00
Sylvan	50000	19.857 ms	0.4282 ms	0.0663 ms	2.87	656.2500	62.5000	10.95 MB	2.84

ExcelReader.Benchmarks.CsvReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 3.39GHz), 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Allocated	Alloc Ratio
ExcelReader	50000	3.688 ms	0.0674 ms	0.0104 ms	1.00	0.00	840 B	1.00
ExcelReaderWide	50000	11.948 ms	0.1370 ms	0.0356 ms	3.24	0.01	840 B	1.00
ExcelReaderAsync	50000	3.777 ms	0.0208 ms	0.0054 ms	1.02	0.00	912 B	1.09
Sep	50000	11.718 ms	0.3207 ms	0.0833 ms	3.18	0.02	4024 B	4.79
Sylvan	50000	5.402 ms	0.0243 ms	0.0038 ms	1.46	0.00	38682 B	46.05

ExcelReader.Benchmarks.CsvWriteBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
ExcelReaderWriter	50000	6.507 ms	0.1422 ms	0.0369 ms	1.00	0.01	500.0000	500.0000	500.0000	4 MB	1.00
Sep	50000	10.022 ms	0.2595 ms	0.0402 ms	1.54	0.01	500.0000	500.0000	500.0000	4.01 MB	1.00
SylvanWriter	50000	10.574 ms	0.4782 ms	0.1242 ms	1.63	0.02	500.0000	500.0000	500.0000	4.04 MB	1.01

ExcelReader.Benchmarks.DataReaderBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
INTEL XEON PLATINUM 8573C 2.30GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
Baseline_RawRows	50000	7.673 ms	0.4784 ms	0.1242 ms	1.00	0.02	-	-	-	3.55 KB	1.00
DataReader_GetValue	50000	10.607 ms	0.3628 ms	0.0561 ms	1.38	0.02	62.5000	-	-	5131.2 KB	1,443.50
DataReader_TypedGetters	50000	10.053 ms	0.6758 ms	0.1755 ms	1.31	0.03	15.6250	-	-	1615.57 KB	454.49
DataReader_GetBytes	50000	7.736 ms	0.2271 ms	0.0590 ms	1.01	0.02	-	-	-	4.24 KB	1.19
DataTable_Load	50000	53.487 ms	4.0802 ms	0.6314 ms	6.97	0.13	1000.0000	900.0000	800.0000	23392.94 KB	6,580.87

ExcelReader.Benchmarks.EncryptedWorkbookBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.76GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
Plain_Stream	58.43 μs	4.238 μs	0.656 μs	1.00	0.01	0.4883	8.75 KB	1.00
Encrypted_Stream	58,925.31 μs	801.192 μs	208.067 μs	1,008.52	10.47	-	37.82 KB	4.32
Encrypted_Stream_VerifyIntegrity	59,731.79 μs	2,661.412 μs	691.160 μs	1,022.32	14.82	-	39.76 KB	4.54
Encrypted_Memory	59,323.28 μs	750.733 μs	194.963 μs	1,015.33	10.47	-	52.74 KB	6.03
Encrypted_OpenOnly	60,086.00 μs	451.963 μs	117.373 μs	1,028.38	10.31	-	32.25 KB	3.69
Large_Plain_Stream	58,464.01 μs	1,555.214 μs	403.884 μs	1,000.62	11.73	-	3.55 KB	0.41
Large_Encrypted_Stream	120,260.00 μs	367.343 μs	56.847 μs	2,058.27	20.46	-	29.31 KB	3.35
Large_Encrypted_OpenOnly	60,353.90 μs	651.005 μs	169.064 μs	1,032.97	10.53	-	28.72 KB	3.28

ExcelReader.Benchmarks.InflateBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 3.39GHz), 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Categories	Mean	Error	StdDev	Ratio	Allocated	Alloc Ratio
SharedStrings_DeflateStream	SharedStrings	15.71 ms	0.217 ms	0.034 ms	1.00	280 B	1.00
SharedStrings_InflateStream	SharedStrings	10.04 ms	0.081 ms	0.012 ms	0.64	200 B	0.71

XlsbSheet_DeflateStream	XlsbSheet	18.40 ms	0.112 ms	0.029 ms	1.00	280 B	1.00
XlsbSheet_InflateStream	XlsbSheet	15.45 ms	0.056 ms	0.009 ms	0.84	200 B	0.71

XlsxSheet_DeflateStream	XlsxSheet	33.50 ms	0.067 ms	0.017 ms	1.00	280 B	1.00
XlsxSheet_InflateStream	XlsxSheet	24.31 ms	0.077 ms	0.020 ms	0.73	200 B	0.71

ExcelReader.Benchmarks.NativeOpenBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Format	ReadRows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
OpenMemory	csv	False	1,270,393.0 ns	86,983.41 ns	22,589.32 ns	1.000	0.02	398.4375	398.4375	398.4375	8171734 B	1.000
OpenFile	csv	False	8,100.8 ns	363.04 ns	94.28 ns	0.006	0.00	0.0458	-	-	976 B	0.000
OpenSource	csv	False	208.9 ns	9.18 ns	2.38 ns	0.000	0.00	0.0372	-	-	624 B	0.000
OpenStream	csv	False	191.1 ns	4.16 ns	0.64 ns	0.000	0.00	0.0334	-	-	560 B	0.000

OpenMemory	csv	True	16,249,929.7 ns	860,810.46 ns	223,549.74 ns	1.00	0.02	375.0000	375.0000	375.0000	8176271 B	1.000
OpenFile	csv	True	15,479,351.8 ns	669,435.98 ns	173,850.40 ns	0.95	0.02	-	-	-	5620 B	0.001
OpenSource	csv	True	16,626,589.4 ns	329,350.54 ns	50,967.36 ns	1.02	0.01	406.2500	406.2500	406.2500	8181200 B	1.001
OpenStream	csv	True	17,644,402.5 ns	117,117.10 ns	18,124.00 ns	1.09	0.01	500.0000	500.0000	500.0000	16717660 B	2.045

OpenMemory	xls	False	1,523,972.4 ns	69,457.94 ns	18,038.01 ns	1.00	0.02	332.0313	332.0313	332.0313	11834486 B	1.000
OpenFile	xls	False	229,761.7 ns	6,061.87 ns	938.08 ns	0.15	0.00	0.4883	-	-	14480 B	0.001
OpenSource	xls	False	1,175,795.4 ns	129,626.48 ns	33,663.59 ns	0.77	0.02	396.4844	396.4844	396.4844	7646929 B	0.646
OpenStream	xls	False	2,309,531.4 ns	134,066.10 ns	20,746.88 ns	1.52	0.02	335.9375	335.9375	335.9375	27563448 B	2.329

OpenMemory	xls	True	37,520,355.7 ns	130,638.64 ns	33,926.44 ns	1.00	0.00	285.7143	285.7143	285.7143	11841153 B	1.000
OpenFile	xls	True	36,607,018.1 ns	96,187.46 ns	24,979.58 ns	0.98	0.00	-	-	-	21240 B	0.002
OpenSource	xls	True	39,630,489.2 ns	399,183.51 ns	61,774.09 ns	1.06	0.00	384.6154	384.6154	384.6154	11854453 B	1.001
OpenStream	xls	True	39,043,315.8 ns	684,384.70 ns	177,732.53 ns	1.04	0.00	461.5385	461.5385	461.5385	27570997 B	2.328

OpenMemory	xlsb	False	493,762.1 ns	31,083.72 ns	8,072.34 ns	1.00	0.02	333.0078	333.0078	333.0078	3882551 B	1.000
OpenFile	xlsb	False	66,070.5 ns	5,779.44 ns	894.37 ns	0.13	0.00	0.2441	-	-	5144 B	0.001
OpenSource	xlsb	False	487,566.1 ns	136,368.78 ns	35,414.54 ns	0.99	0.07	333.0078	333.0078	333.0078	3881639 B	1.000
OpenStream	xlsb	False	1,675,033.7 ns	135,922.82 ns	35,298.72 ns	3.39	0.08	361.3281	361.3281	361.3281	11223552 B	2.891

OpenMemory	xlsb	True	53,327,365.0 ns	694,159.37 ns	107,421.93 ns	1.00	0.00	300.0000	300.0000	300.0000	3889086 B	1.000
OpenFile	xlsb	True	51,590,346.0 ns	759,197.13 ns	117,486.60 ns	0.97	0.00	-	-	-	11774 B	0.003
OpenSource	xlsb	True	52,256,608.4 ns	1,275,937.56 ns	331,356.93 ns	0.98	0.01	300.0000	300.0000	300.0000	3890102 B	1.000
OpenStream	xlsb	True	55,777,588.1 ns	517,450.99 ns	80,076.11 ns	1.05	0.00	600.0000	600.0000	600.0000	11230784 B	2.888

OpenMemory	xlsx	False	902,548.4 ns	357,951.28 ns	92,958.81 ns	1.01	0.13	333.0078	333.0078	333.0078	6725383 B	1.000
OpenFile	xlsx	False	57,181.7 ns	1,712.16 ns	264.96 ns	0.06	0.01	0.1221	-	-	4008 B	0.001
OpenSource	xlsx	False	1,224,769.5 ns	32,675.88 ns	5,056.63 ns	1.37	0.13	427.7344	427.7344	427.7344	6726692 B	1.000
OpenStream	xlsx	False	1,827,635.9 ns	177,748.97 ns	46,160.84 ns	2.04	0.20	398.4375	398.4375	398.4375	14065810 B	2.091

OpenMemory	xlsx	True	70,219,577.0 ns	114,758.28 ns	17,758.97 ns	1.00	0.00	250.0000	250.0000	250.0000	6733346 B	1.000
OpenFile	xlsx	True	70,467,349.4 ns	682,284.16 ns	105,584.23 ns	1.00	0.00	-	-	-	12236 B	0.002
OpenSource	xlsx	True	70,163,185.7 ns	362,789.01 ns	94,215.15 ns	1.00	0.00	250.0000	250.0000	250.0000	6737994 B	1.001
OpenStream	xlsx	True	72,466,058.6 ns	1,452,960.44 ns	377,329.21 ns	1.03	0.00	285.7143	285.7143	285.7143	14073713 B	2.090

ExcelReader.Benchmarks.NativeRowReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
NextRowBlob	51.04 ms	1.676 ms	0.435 ms	1.00	300.0000	300.0000	300.0000	3.71 MB	1.00
NextRowDecoded	56.94 ms	0.839 ms	0.130 ms	1.12	222.2222	222.2222	222.2222	3.71 MB	1.00
ReadAllBlob	55.63 ms	1.660 ms	0.431 ms	1.09	1000.0000	888.8889	-	21.06 MB	5.68
ReadAllDecoded	78.13 ms	1.880 ms	0.291 ms	1.53	571.4286	571.4286	571.4286	5.71 MB	1.54

ExcelReader.Benchmarks.NativeTypedParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
ParseTyped	46.30 ms	0.401 ms	0.104 ms	1.00	0.00	272.7273	272.7273	272.7273	3.71 MB	1.00
ParseArrow	43.13 ms	3.851 ms	1.000 ms	0.93	0.02	250.0000	250.0000	250.0000	3.72 MB	1.00

ExcelReader.Benchmarks.ParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
ExcelParserSync	50000	16.05 ms	0.279 ms	0.073 ms	1.00	0.01	218.7500	3959.13 KB	1.000
ExcelParserSyncSharedStrings	50000	15.01 ms	0.113 ms	0.029 ms	0.94	0.00	140.6250	2348.98 KB	0.593
ExcelParserStructSync	50000	15.12 ms	0.118 ms	0.018 ms	0.94	0.00	93.7500	1615.38 KB	0.408
RefStructModelSync	50000	13.55 ms	0.078 ms	0.012 ms	0.84	0.00	-	4.05 KB	0.001
ExcelParserAsync	50000	17.31 ms	0.033 ms	0.005 ms	1.08	0.00	218.7500	3959.23 KB	1.000
ExcelParserXlsbSync	50000	11.05 ms	0.135 ms	0.035 ms	0.69	0.00	234.3750	3959.36 KB	1.000
ExcelParserXlsbAsync	50000	11.89 ms	0.229 ms	0.059 ms	0.74	0.00	234.3750	3959.47 KB	1.000
OfficeIMO	50000	158.19 ms	13.278 ms	2.055 ms	9.86	0.12	-	5834.04 KB	1.474
Sylvan	50000	89.64 ms	2.070 ms	0.320 ms	5.59	0.03	-	10726.71 KB	2.709
SylvanAsync	50000	91.27 ms	3.466 ms	0.900 ms	5.69	0.06	-	10727.74 KB	2.710

ExcelReader.Benchmarks.ReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 3.39GHz), 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
ExcelReader	50000	10.761 ms	0.1432 ms	0.0372 ms	1.00	0.00	-	3.51 KB	1.00
ExcelReaderAsync	50000	11.441 ms	0.0552 ms	0.0143 ms	1.06	0.00	-	3.58 KB	1.02
ExcelReaderXlsb	50000	6.250 ms	0.0154 ms	0.0024 ms	0.58	0.00	-	3.74 KB	1.07
ExcelReaderXlsbAsync	50000	6.320 ms	0.0183 ms	0.0048 ms	0.59	0.00	-	3.81 KB	1.09
ExcelReaderMaterialized	50000	12.748 ms	0.0466 ms	0.0121 ms	1.18	0.00	62.5000	1614.84 KB	460.35
Sylvan	50000	57.968 ms	1.0896 ms	0.1686 ms	5.39	0.02	-	1939.18 KB	552.82
OfficeIMO	50000	176.228 ms	87.8192 ms	13.5901 ms	16.38	1.12	-	7003.67 KB	1,996.59
OfficeIMOXlsb	50000	16.003 ms	0.2609 ms	0.0404 ms	1.49	0.01	250.0000	6858.38 KB	1,955.17

ExcelReader.Benchmarks.RealDataReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 9V74 2.60GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
Xlsx_ExcelReader	52.332 ms	0.8652 ms	0.1339 ms	1.00	0.00	-	7408 B	1.00
Xlsx_Sylvan	230.347 ms	0.9381 ms	0.1452 ms	4.40	0.01	-	659688 B	89.05
Xlsx_ExcelReader_Materialized	56.719 ms	0.2279 ms	0.0592 ms	1.08	0.00	-	17107 B	2.31
Xlsx_ExcelReader_Prefetch	37.274 ms	9.3308 ms	2.4232 ms	0.71	0.04	-	23872 B	3.22
Xlsx_ExcelReader_Memory	52.971 ms	2.1755 ms	0.5650 ms	1.01	0.01	-	7152 B	0.97
Xlsx_ExcelReader_Memory_Prefetch	35.398 ms	7.2521 ms	1.8833 ms	0.68	0.03	-	23724 B	3.20
Xlsm_ExcelReader	52.326 ms	0.1776 ms	0.0275 ms	1.00	0.00	-	7408 B	1.00
Xlsm_Sylvan	230.082 ms	2.4235 ms	0.3750 ms	4.40	0.01	-	659528 B	89.03
Xlsm_ExcelReader_Materialized	55.968 ms	0.5330 ms	0.0825 ms	1.07	0.00	-	17104 B	2.31
Xlsm_ExcelReader_Prefetch	34.954 ms	8.3362 ms	2.1649 ms	0.67	0.04	-	23808 B	3.21
Xlsm_ExcelReader_Memory	53.675 ms	0.1770 ms	0.0460 ms	1.03	0.00	-	7152 B	0.97
Xlsm_ExcelReader_Memory_Prefetch	34.660 ms	6.1922 ms	0.9582 ms	0.66	0.02	-	23552 B	3.18
Xlsb_ExcelReader	26.172 ms	0.0774 ms	0.0120 ms	0.50	0.00	-	6952 B	0.94
Xlsb_Sylvan	35.215 ms	0.1786 ms	0.0464 ms	0.67	0.00	-	346670 B	46.80
Xlsb_ExcelReader_Materialized	29.219 ms	0.4220 ms	0.0653 ms	0.56	0.00	-	16648 B	2.25
Xlsb_ExcelReader_Prefetch	15.400 ms	2.1702 ms	0.5636 ms	0.29	0.01	-	13000 B	1.75
Xlsb_ExcelReader_Memory	26.491 ms	0.1402 ms	0.0217 ms	0.51	0.00	-	8696 B	1.17
Xlsb_ExcelReader_Memory_Prefetch	15.140 ms	1.4985 ms	0.2319 ms	0.29	0.00	-	14850 B	2.00
Xls_ExcelReader	12.749 ms	0.1966 ms	0.0510 ms	0.24	0.00	-	12304 B	1.66
Xls_Sylvan	21.762 ms	0.2103 ms	0.0326 ms	0.42	0.00	-	190366 B	25.70
Xls_ExcelReader_Materialized	14.866 ms	0.2071 ms	0.0538 ms	0.28	0.00	-	22000 B	2.97
Xls_ExcelReader_Memory	12.558 ms	0.1187 ms	0.0308 ms	0.24	0.00	-	12168 B	1.64
Csv_ExcelReader	6.443 ms	0.0717 ms	0.0186 ms	0.12	0.00	-	840 B	0.11
Csv_Sylvan	5.353 ms	0.0299 ms	0.0078 ms	0.10	0.00	-	41226 B	5.57
Csv_ExcelReader_Materialized	23.904 ms	0.2431 ms	0.0631 ms	0.46	0.00	2218.7500	37443448 B	5,054.46
Csv_ExcelReader_Memory	6.165 ms	0.0242 ms	0.0063 ms	0.12	0.00	-	568 B	0.08

ExcelReader.Benchmarks.RealDataTypedParseBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 9V74 2.60GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
Xlsx_ExcelParser	63.73 ms	3.144 ms	0.816 ms	1.00	0.02	500.0000	8.02 MB	1.00
Xlsb_ExcelParser	34.75 ms	0.355 ms	0.055 ms	0.55	0.01	466.6667	8.02 MB	1.00

ExcelReader.Benchmarks.RecordWriteBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
Xlsx	50000	17.538 ms	0.1057 ms	0.0163 ms	1.00	500.0000	500.0000	500.0000	4.02 MB	1.00
Xlsb	50000	10.421 ms	0.0852 ms	0.0221 ms	0.59	500.0000	500.0000	500.0000	4.02 MB	1.00
Xls	50000	7.919 ms	0.4844 ms	0.0750 ms	0.45	250.0000	250.0000	250.0000	4.03 MB	1.00
Csv	50000	7.103 ms	0.0849 ms	0.0131 ms	0.40	500.0000	500.0000	500.0000	4 MB	1.00
XlsxMapped	50000	19.404 ms	0.6372 ms	0.1655 ms	1.11	500.0000	500.0000	500.0000	4.02 MB	1.00
XlsbMapped	50000	12.563 ms	0.1558 ms	0.0405 ms	0.72	500.0000	500.0000	500.0000	4.02 MB	1.00
CsvMapped	50000	7.822 ms	0.1208 ms	0.0187 ms	0.45	500.0000	500.0000	500.0000	4 MB	1.00

ExcelReader.Benchmarks.StringHeavyReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 9V74 2.60GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
Xlsx_ExcelReader	65536	42.30 ms	0.479 ms	0.124 ms	1.00	0.00	-	-	-	2.18 MB	1.00
Xlsx_ExcelReader_Prefetch	65536	33.04 ms	4.913 ms	1.276 ms	0.78	0.03	-	-	-	2.21 MB	1.01
Xlsx_Sylvan	65536	233.77 ms	9.237 ms	1.429 ms	5.53	0.03	666.6667	333.3333	-	17.41 MB	7.99
Xlsx_ExcelReader_Materialized	65536	79.66 ms	2.305 ms	0.599 ms	1.88	0.01	1000.0000	857.1429	285.7143	15.25 MB	7.00
Xlsx_ExcelReader_Materialized_Interned	65536	79.58 ms	12.879 ms	1.993 ms	1.88	0.04	1000.0000	857.1429	285.7143	15.26 MB	7.00
Xlsb_ExcelReader	65536	37.99 ms	1.668 ms	0.433 ms	0.90	0.01	-	-	-	2.18 MB	1.00
Xlsb_ExcelReader_Prefetch	65536	26.33 ms	3.460 ms	0.899 ms	0.62	0.02	-	-	-	2.22 MB	1.02
Xlsb_Sylvan	65536	87.56 ms	20.628 ms	5.357 ms	2.07	0.12	1166.6667	1000.0000	333.3333	17.38 MB	7.97
Xlsb_ExcelReader_Materialized	65536	68.00 ms	1.889 ms	0.491 ms	1.61	0.01	1000.0000	857.1429	285.7143	15.25 MB	7.00
Xlsb_ExcelReader_Materialized_Interned	65536	72.45 ms	13.524 ms	3.512 ms	1.71	0.08	1000.0000	875.0000	250.0000	15.26 MB	7.00
Xlsb_ExcelReader_Memory	65536	36.66 ms	0.467 ms	0.121 ms	0.87	0.00	-	-	-	6.46 MB	2.97

ExcelReader.Benchmarks.WriteBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
ExcelReaderWriter	50000	16.554 ms	0.1595 ms	0.0414 ms	1.00	500.0000	500.0000	500.0000	4.02 MB	1.00
ExcelReaderWriterSharedStrings	50000	16.101 ms	0.0370 ms	0.0057 ms	0.97	500.0000	500.0000	500.0000	4.06 MB	1.01
ExcelReaderWriterPrefetch	50000	12.584 ms	1.6537 ms	0.2559 ms	0.76	484.3750	484.3750	484.3750	4.03 MB	1.00
ExcelReaderXlsbWriter	50000	10.399 ms	0.1737 ms	0.0451 ms	0.63	500.0000	500.0000	500.0000	4.02 MB	1.00
ExcelReaderXlsbWriterSharedStrings	50000	10.176 ms	0.4387 ms	0.1139 ms	0.61	500.0000	500.0000	500.0000	4.06 MB	1.01
ExcelReaderXlsbWriterPrefetch	50000	8.972 ms	0.5494 ms	0.1427 ms	0.54	484.3750	484.3750	484.3750	4.03 MB	1.00
OfficeIMO	50000	23.960 ms	0.0634 ms	0.0098 ms	1.45	312.5000	312.5000	312.5000	4.02 MB	1.00
SpreadCheetah	50000	20.803 ms	0.3130 ms	0.0813 ms	1.26	1437.5000	718.7500	718.7500	15.84 MB	3.94

ExcelReader.Benchmarks.WritePathBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Mean	Error	StdDev	Allocated
NativeStrings_Xlsx	27.780 ms	0.0909 ms	0.0141 ms	18448 B
NativeStrings_Csv	7.214 ms	0.0201 ms	0.0031 ms	416 B
ArrowStrings_Xlsx	36.517 ms	0.2767 ms	0.0719 ms	18496 B
StyledRows_Xlsx	10.218 ms	0.0231 ms	0.0036 ms	18632 B

ExcelReader.Benchmarks.XlsReadBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 3.39GHz), 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	Gen0	Gen1	Allocated	Alloc Ratio
ExcelReader	50000	4.918 ms	0.0616 ms	0.0160 ms	1.00	-	-	2.84 KB	1.00
ExcelReaderAsync	50000	4.573 ms	0.0466 ms	0.0072 ms	0.93	-	-	2.91 KB	1.02
Sylvan	50000	7.834 ms	0.1798 ms	0.0467 ms	1.59	62.5000	7.8125	1717.73 KB	605.70
OfficeIMO	50000	10.204 ms	0.2313 ms	0.0601 ms	2.07	421.8750	-	10499.2 KB	3,702.20

ExcelReader.Benchmarks.XlsWriteBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v3

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
XlsWriter	50000	7.802 ms	0.0869 ms	0.0226 ms	1.00	484.3750	484.3750	484.3750	16.03 MB	1.00
XlsxWriter	50000	16.080 ms	0.1309 ms	0.0203 ms	2.06	500.0000	500.0000	500.0000	4.02 MB	0.25

ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark


BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.5 LTS (Noble Numbat)
AMD EPYC 9V74 2.60GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.401
  [Host]     : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4
  Job-MEHJPP : .NET 10.0.12 (10.0.12, 10.0.1226.42308), X64 RyuJIT x86-64-v4

IterationCount=5  WarmupCount=1

Method	Rows	Mean	Error	StdDev	Ratio	RatioSD	Allocated	Alloc Ratio
EndToEnd	65536	42.130 ms	0.2185 ms	0.0567 ms	1.00	0.00	2285656 B	1.00
EndToEnd_Prefetch	65536	33.316 ms	2.6779 ms	0.6954 ms	0.79	0.02	2319424 B	1.01
SharedStringPrologue	65536	13.216 ms	0.9705 ms	0.2520 ms	0.31	0.01	764792 B	0.33
Stored_EndToEnd	65536	23.804 ms	0.2979 ms	0.0774 ms	0.56	0.00	2284976 B	1.00
Stored_SharedStringPrologue	65536	4.939 ms	0.2062 ms	0.0319 ms	0.12	0.00	764112 B	0.33
IndexParse_Utf8Parser	65536	2.745 ms	0.0109 ms	0.0017 ms	0.07	0.00	-	0.00
IndexParse_DigitLoop	65536	1.630 ms	0.0026 ms	0.0007 ms	0.04	0.00	-	0.00

The generated factory was `new T()`, which fails with CS9035 when T or a base type declares a required member. It now sets every required member to default in the object initializer and lets the parse overwrite the ones it maps, matching FromAttributes, whose Activator.CreateInstance the runtime never checks. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

… benchmarks for native open operations

… across C++, Python, and Rust implementations

…rmats to reflect improved performance metrics

…merator overhead based on recent measurements

GabrielMarquezMatte and others added 30 commits October 7, 2026 13:41

chore: promote public API for v6.0.0

6fcd15c

Merge pull request #137 from GabrielMarquezMatte/chore/promote-public…

d3a3c3a

…-api-v6.0.0 chore: promote public API for v6.0.0

feat(python): enhance Arrow stream handling with GIL management and t…

d86e4af

…hreading support

Merge branch 'develop' of https://github.com/GabrielMarquezMatte/Exce…

5947e6e

…lReader into develop

feat(core): open a workbook from any byte source through a seekable view

57dc08c

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(core): cache a byte source in blocks fetched once

fcb2605

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(native): add source and buffering options and keep accepting the…

5574daa

… 6.0 options layout Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

fix(native): make the 6.0 options size a constant and document it

d46ec61

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(native): open a workbook over a source the caller serves

6bc46a0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(native): open a workbook over a stream that cannot seek

0e20232

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(native): open a workbook through xl_open_source from C

4714b45

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(rust): open a workbook from a Source or any Read

c933af8

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(rust): pin source release counts and the new ABI layouts

962e872

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(cpp): open a workbook from an xl::Source or an xl::InputStream

4db2192

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(python): open a workbook from a Source or a readable stream

2b1b3ad

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

fix(python): register a source only after every fallible step, and gu…

995dec9

…ard stream reads Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: read workbooks from your own sources and streams

fe9a3b6

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat: enhance CSV stream handling to support schema inference and rep…

e269dc6

…lay functionality

Removing unnecessary comments

77f97b6

Merge pull request #138 from GabrielMarquezMatte/dependabot/nuget/dev…

4f8535d

…elop/analyzers-55e46a7a66 Bump the analyzers group with 1 update

Merge pull request #139 from GabrielMarquezMatte/dependabot/nuget/tes…

1975041

…ts/ExcelReader.Tests/develop/test-4352e14058 Bump the test group with 2 updates

feat: add Huffman decode-table builder for the managed inflate decoder

1514726

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat: add a managed streaming inflate decoder

d7f1559

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test: fuzz the managed inflate decoder against DeflateStream

58bb3ca

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

perf: benchmark the managed inflate decoder against DeflateStream

0929fc6

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: record the managed inflate measurements

408b76e

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

GabrielMarquezMatte and others added 10 commits October 8, 2026 14:54

fix: update binary file for ExcelReader native integration

5997074

perf(native): regenerate the static PGO profile after the inflate fas…

1d3afab

…t-loop change FastLoop lost a parameter, so the previous profile no longer matched it by signature. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Merge branch 'develop' of https://github.com/GabrielMarquezMatte/Exce…

640a6e2

…lReader into develop

Merge branch 'master' into develop

fc6e38a

perf(native): regenerate the static PGO profile after the native colu…

d2ec3cf

…mn buffers ColumnBuilder.Append and Concat changed signature, so the previous profile no longer matched them. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ci: run InflateBenchmark with the read group

df3634c

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

GabrielMarquezMatte and others added 5 commits October 8, 2026 18:36

feat(native): add support for auto-detecting CSV format and implement…

65945b4

… benchmarks for native open operations

perf(docs): update benchmark results for improved performance metrics…

415d97f

… across C++, Python, and Rust implementations

perf(docs): update benchmark results for XLSX, XLSM, XLSB, and CSV fo…

7e04748

…rmats to reflect improved performance metrics

perf(docs): update performance metrics for NativeAOT XLSX and CSV enu…

4aa3766

…merator overhead based on recent measurements

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What does this change?

Open a workbook from your own bytes

Managed inflate decoder

Typed parse builds columns in native memory

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Benchmark Results

Moved by at least 10%

ExcelReader.Benchmarks.ArrowConversionBenchmark

ExcelReader.Benchmarks.ChunkedParseBenchmark

ExcelReader.Benchmarks.ColdStartBenchmark

ExcelReader.Benchmarks.CsvParallelParseBenchmark

ExcelReader.Benchmarks.CsvParallelVsSepBenchmark

ExcelReader.Benchmarks.CsvParseBenchmark

ExcelReader.Benchmarks.CsvReadBenchmark

ExcelReader.Benchmarks.CsvWriteBenchmark

ExcelReader.Benchmarks.DataReaderBenchmark

ExcelReader.Benchmarks.EncryptedWorkbookBenchmark

ExcelReader.Benchmarks.InflateBenchmark

ExcelReader.Benchmarks.NativeOpenBenchmark

ExcelReader.Benchmarks.NativeRowReadBenchmark

ExcelReader.Benchmarks.NativeTypedParseBenchmark

ExcelReader.Benchmarks.ParseBenchmark

ExcelReader.Benchmarks.ReadBenchmark

ExcelReader.Benchmarks.RealDataReadBenchmark

ExcelReader.Benchmarks.RealDataTypedParseBenchmark

ExcelReader.Benchmarks.RecordWriteBenchmark

ExcelReader.Benchmarks.StringHeavyReadBenchmark

ExcelReader.Benchmarks.WriteBenchmark

ExcelReader.Benchmarks.WritePathBenchmark

ExcelReader.Benchmarks.XlsReadBenchmark

ExcelReader.Benchmarks.XlsWriteBenchmark

ExcelReader.Benchmarks.XlsxSharedStringHotPathBenchmark

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GabrielMarquezMatte commented Oct 8, 2026 •

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