⚡ Bolt: Optimize tight scanning loop and file open#95
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✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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OpenCode Review Overview
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OpenCode Agent approved this PR.
The PR optimizes the scanner by using tuples for rule caching and built-in open for file reading, which reduces overhead in hot paths. The changes are well-contained and do not introduce security or functional regressions.
- Result: APPROVE
- Reason: Performance optimizations in the scanner are safe and improve efficiency.
- Head SHA:
f07f7345657804eb4b315a275a53cd9906451e58 - Workflow run: 27781986795
- Workflow attempt: 1
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Pull request overview
This PR optimizes the CLI scanner’s hot path by reducing per-line overhead during file scanning, primarily by caching rule metadata in tuple form and using the built-in open() for file reads.
Changes:
- Convert the per-extension rules cache from dictionaries to tuples and unpack directly in
_scan_file’s inner loop. - Switch file reading from
Path.open()to the built-inopen()in_scan_file. - Apply formatting-only adjustments (string quoting, wrapping long prints/collections) and document the optimization in
.jules/bolt.md.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| scanner/cli/vibesec.py | Optimizes scanning loop by caching rule fields as tuples and unpacking in the inner loop; switches to built-in open(); formatting refactors. |
| .jules/bolt.md | Adds a Bolt note describing the tuple-cache optimization and open() change. |
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| ## 2024-06-18 - Optimize scanner loop using tuples | ||
| **Learning:** In highly repetitive parsing loops running on thousands of files (like a codebase scanner), unpacking values from a dictionary into the hot loop path repeatedly incurs a small overhead per element, per line scanned. Accessing dictionary keys introduces hash map lookup costs. | ||
| **Action:** When a static configuration object is frequently accessed in a tight loop, cache or map the list of dictionaries into a list of tuples with pre-resolved attributes ahead of time, which enables immediate and fast unpacking into variables. Additionally, standard `open()` avoids `pathlib.Path.open()`'s minor object-method overhead in paths executed repeatedly. |
💡 What: Changed the rules cache to store tuples instead of dictionaries, avoiding dictionary lookup and attribute access in the inner loop. Also switched to the built-in
openfunction.🎯 Why: The tight scanning loop
_scan_fileexecuted for every file line checks rules unpacked from dictionaries, which introduces overhead.📊 Impact: Reduces loop iteration time slightly, lowering the file scan constant overhead.
🔬 Measurement: Benchmark using standard test suite timings on large repositories.
PR created automatically by Jules for task 9988947823875522181 started by @seonghobae