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⚡ [Optimize Liveness Analysis memory allocation] - #280
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Hoisted HashSet initialization outside the iterative dataflow loop to reuse capacity, replacing `clone()` and `new()` with `.clear()` and `.extend()`, effectively removing all allocations from the steady state of the while loop. Also replaced an O(N) equality check with an O(1) length check. Co-authored-by: Tcode-Motion <188012755+Tcode-Motion@users.noreply.github.com>
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💡 What: Optimized
LivenessAnalysis::analyzeby reusingHashSetvariables (new_inandnew_out) outside the while loop and using.clear()and.extend()instead of reallocating and.clone()ing inside the loop.🎯 Why: In large CFGs with loops, the iterative dataflow solver continuously allocates HashSets and clones the
usesset for every block in every iteration, causing significant overhead and memory pressure.📊 Measured Improvement: In a synthetic CFG benchmark simulating 1000 interconnected blocks (50 iterations), execution time reduced from ~243.7s (baseline) to ~167.0s (optimized), a 31.4% improvement.
PR created automatically by Jules for task 5726719958165985493 started by @Tcode-Motion