perf: optimize MappedCrossoverInsertMutator::mutate to eliminate redu…#3742
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perf: optimize MappedCrossoverInsertMutator::mutate to eliminate redu…#3742ayush78490 wants to merge 1 commit intoAFLplusplus:mainfrom
ayush78490 wants to merge 1 commit intoAFLplusplus:mainfrom
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…ndant operations This commit addresses issue AFLplusplus#3731 by consolidating redundant input loading and mapping operations in MappedCrossoverInsertMutator::mutate. Previously, the function was: 1. Loading and mapping the corpus input in a first borrow scope to calculate size 2. Getting the same testcase again and loading/mapping it again in a second scope This resulted in: - 2x get_from_all() calls - 2x load_input() calls - 2x input_mapper() invocations - Unnecessary borrow complexity - Reduced code readability CHANGES: - Consolidate input loading and mapping into a single scope - Clone the mapped result to allow early borrow release - Drop testcase borrow before state mutations - Use match statement for cleaner error handling PERFORMANCE IMPACT: - 50% reduction in redundant corpus accesses - 50% reduction in load operations - 50% reduction in mapper invocations - Improved code clarity and maintainability TESTING: All 7 mutation-related tests pass Fixes AFLplusplus#3731
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This commit addresses issue #3731 by consolidating redundant input loading and mapping operations in MappedCrossoverInsertMutator::mutate.
Previously, the function was:
This resulted in:
CHANGES:
PERFORMANCE IMPACT:
TESTING:
All 7 mutation-related tests pass
Fixes #3731
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