⚡️ Speed up function getActionChildrenPeekData by 21%#49
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⚡️ Speed up function getActionChildrenPeekData by 21%#49codeflash-ai[bot] wants to merge 1 commit intoreleasefrom
getActionChildrenPeekData by 21%#49codeflash-ai[bot] wants to merge 1 commit intoreleasefrom
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The optimized code achieves a **21% runtime improvement** (256μs → 212μs) through three targeted optimizations that reduce overhead in the hot iteration path: **Key Performance Improvements:** 1. **Iterator Optimization**: Replaced `Object.keys(definitions).forEach()` with a cached-length `for` loop (`for (let i = 0, len = keys.length; i < len; i++)`). This eliminates the forEach callback closure allocation on every iteration, which the line profiler confirms was expensive (17.4% of time spent on the forEach line in the original). 2. **Function Object Reuse**: Created a single `EMPTY_FN` constant instead of allocating a new empty function object each time "run" or "clear" is encountered. In TypeScript/JavaScript, function expressions create new objects, so this prevents redundant allocations when processing multiple actions or definitions with these keys. 3. **Early Exit + Switch Statement**: Changed from nested if-else chains to an early `continue` for keys containing "!" followed by a `switch` statement for the special cases. The line profiler shows the original compound conditional check (`if (key === "data" || key === "isLoading" || key === "responseMeta")`) consumed 78.2% of execution time. The switch statement provides better branch prediction and reduces the number of equality comparisons needed per iteration. **Test Performance Patterns:** - **Small/medium definitions** (~10 keys): 8-52% faster in individual tests (e.g., "should handle action with isLoading as false" shows 52.8% improvement) - **Large definitions** (500 keys): 16.6% faster, with the optimization showing its value when iterating over many keys - **Edge cases with minimal work**: Similar performance to baseline (as expected when the hot path isn't exercised) The optimization is particularly effective for actions with typical definition sizes (5-20 keys), which appear to be the common case based on the test patterns. The changes maintain identical behavior while reducing per-key iteration overhead through better memory efficiency and branch prediction.
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📄 21% (0.21x) speedup for
getActionChildrenPeekDatainapp/client/src/utils/FilterInternalProperties/Action.ts⏱️ Runtime :
256 microseconds→212 microseconds(best of250runs)📝 Explanation and details
The optimized code achieves a 21% runtime improvement (256μs → 212μs) through three targeted optimizations that reduce overhead in the hot iteration path:
Key Performance Improvements:
Iterator Optimization: Replaced
Object.keys(definitions).forEach()with a cached-lengthforloop (for (let i = 0, len = keys.length; i < len; i++)). This eliminates the forEach callback closure allocation on every iteration, which the line profiler confirms was expensive (17.4% of time spent on the forEach line in the original).Function Object Reuse: Created a single
EMPTY_FNconstant instead of allocating a new empty function object each time "run" or "clear" is encountered. In TypeScript/JavaScript, function expressions create new objects, so this prevents redundant allocations when processing multiple actions or definitions with these keys.Early Exit + Switch Statement: Changed from nested if-else chains to an early
continuefor keys containing "!" followed by aswitchstatement for the special cases. The line profiler shows the original compound conditional check (if (key === "data" || key === "isLoading" || key === "responseMeta")) consumed 78.2% of execution time. The switch statement provides better branch prediction and reduces the number of equality comparisons needed per iteration.Test Performance Patterns:
The optimization is particularly effective for actions with typical definition sizes (5-20 keys), which appear to be the common case based on the test patterns. The changes maintain identical behavior while reducing per-key iteration overhead through better memory efficiency and branch prediction.
✅ Correctness verification report:
🌀 Click to see Generated Regression Tests
📊 Performance Profile
View detailed line-by-line performance analysis
To edit these changes
git checkout codeflash/optimize-getActionChildrenPeekData-ml2839taand push.