⚡ Bolt: Optimize AST traversal by avoiding eager list materialization - #173
⚡ Bolt: Optimize AST traversal by avoiding eager list materialization#173tachyon-beep wants to merge 2 commits into
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Modified `_assignment_callee` and `_collect_return_paths` to accept `Iterable[ast.AST]` instead of `list[ast.AST]`. Removed `list()` wrappers around `ast.iter_child_nodes` and `func_node.body` during recursive AST walks to prevent unnecessary memory allocations and generator materialization overhead. Co-authored-by: tachyon-beep <544926+tachyon-beep@users.noreply.github.com>
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Pull request overview
Optimizes the L2 taint analysis AST traversal by removing eager list() materialization during recursive walks, reducing allocation/GC overhead while preserving traversal semantics.
Changes:
- Updated
_assignment_calleeand_collect_return_pathsto acceptIterable[ast.AST]. - Removed
list()wrappers aroundfunc_node.bodyandast.iter_child_nodes(...)in recursive traversal. - Added a short internal note under
.jules/documenting the optimization rationale for future changes.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/wardline/scanner/taint/variable_level.py | Avoids eager list creation during AST recursion by accepting/passing iterables directly. |
| .jules/bolt.md | Documents the “avoid eager AST child node materialization” learning/action for future PRs. |
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Modified `_assignment_callee` and `_collect_return_paths` to accept `Iterable[ast.AST]` instead of `list[ast.AST]`. Removed `list()` wrappers around `ast.iter_child_nodes` and `func_node.body` during recursive AST walks to prevent unnecessary memory allocations and generator materialization overhead. Also fixed formatting in unrelated files that failed CI. Co-authored-by: tachyon-beep <544926+tachyon-beep@users.noreply.github.com>
💡 What: Modified
_assignment_calleeand_collect_return_pathsto acceptIterable[ast.AST]instead oflist[ast.AST]and removedlist()wrappers aroundast.iter_child_nodesandfunc_node.bodyduring recursive AST walks.🎯 Why: Creating new list objects for every AST node's children during deep recursive traversal causes unnecessary memory allocations and GC pressure.
📊 Impact: Reduces memory footprint and generator materialization overhead during L2 taint analysis.
🔬 Measurement: Run the test suite and observe successful execution; memory profiling would show fewer list allocations per AST walk.
PR created automatically by Jules for task 479154551959311224 started by @tachyon-beep