perf: Use heap in make_distinct() for O(n log n) complexity#110
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perf: Use heap in make_distinct() for O(n log n) complexity#110
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Replace O(n²) linear search for biggest interval with heap-based approach. The previous implementation searched all intervals linearly on each iteration of the outer loop. Now we use a max-heap to find the biggest interval in O(log n) amortized time. Key changes: - Use heapq with negative sizes for max-heap behavior - Track valid intervals with a set for O(1) membership checks - Re-add intervals to heap with updated sizes after tightening - Handle stale heap entries by verifying sizes before use This improves performance for diffs with many overlapping edit bounds. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Changes
In
bounds.py:make_distinct(), the previous implementation searched all intervals linearly on each iteration to find the biggest interval. This made the overall complexity O(n²).Now we use a max-heap (via
heapqwith negative sizes) to find the biggest interval in O(log n) amortized time:Complexity Analysis
Test plan
🤖 Generated with Claude Code