⚡️ Speed up function determine_dependency_manager by 15% in PR #1195 (liniting_issues)#1196
Merged
KRRT7 merged 1 commit intoliniting_issuesfrom Jan 29, 2026
Conversation
The optimization achieves a **14% runtime improvement** by caching `Path.cwd()` once at the start of the function instead of calling it twice during the lock file checks. **Key optimization:** - **Single Path.cwd() call**: The original code called `Path.cwd()` twice (lines checking `poetry.lock` and `uv.lock`), while the optimized version calls it once and reuses the result via the `cwd` variable. **Why this matters:** `Path.cwd()` is a relatively expensive operation that involves system calls to retrieve the current working directory. Line profiler results show: - Original: First lock check took 3.59ms (57.2% of total time), second took 2.26ms (36% of total time) - Optimized: The single `cwd = Path.cwd()` took 1.79ms (32.7%), with subsequent checks using the cached path taking 2.05ms (37.4%) and 1.22ms (22.1%) The net effect is reducing filesystem/system call overhead from ~5.85ms to ~5.05ms across the lock file checks. **Performance characteristics:** Based on the annotated tests, this optimization provides consistent **11-19% speedups** across nearly all test cases: - Best speedup (19.2%): Test with uv-prefixed keys like "uvApp" - Strong improvements (16-17%): Tests checking lock files or no tool sections - Consistent gains (11-15%): Tests with tool section parsing The optimization is particularly beneficial when `determine_dependency_manager` is called frequently, as indicated by the function_references showing it's invoked during GitHub Actions workflow generation (both in `generate_dynamic_workflow_content` and `customize_codeflash_yaml_content`). Since these are CI/CD initialization paths that may be called multiple times during repository setup, the cumulative savings become meaningful.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
⚡️ This pull request contains optimizations for PR #1195
If you approve this dependent PR, these changes will be merged into the original PR branch
liniting_issues.📄 15% (0.15x) speedup for
determine_dependency_managerincodeflash/cli_cmds/cmd_init.py⏱️ Runtime :
2.33 milliseconds→2.03 milliseconds(best of109runs)📝 Explanation and details
The optimization achieves a 14% runtime improvement by caching
Path.cwd()once at the start of the function instead of calling it twice during the lock file checks.Key optimization:
Path.cwd()twice (lines checkingpoetry.lockanduv.lock), while the optimized version calls it once and reuses the result via thecwdvariable.Why this matters:
Path.cwd()is a relatively expensive operation that involves system calls to retrieve the current working directory. Line profiler results show:cwd = Path.cwd()took 1.79ms (32.7%), with subsequent checks using the cached path taking 2.05ms (37.4%) and 1.22ms (22.1%)The net effect is reducing filesystem/system call overhead from ~5.85ms to ~5.05ms across the lock file checks.
Performance characteristics:
Based on the annotated tests, this optimization provides consistent 11-19% speedups across nearly all test cases:
The optimization is particularly beneficial when
determine_dependency_manageris called frequently, as indicated by the function_references showing it's invoked during GitHub Actions workflow generation (both ingenerate_dynamic_workflow_contentandcustomize_codeflash_yaml_content). Since these are CI/CD initialization paths that may be called multiple times during repository setup, the cumulative savings become meaningful.✅ Correctness verification report:
🌀 Click to see Generated Regression Tests
To edit these changes
git checkout codeflash/optimize-pr1195-2026-01-29T17.08.06and push.