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swift-mirror/stdlib/public/runtime/MetadataCache.h
Mike Ash fc6cfbbf32 [Runtime] Have MetadataCacheKey::operator== try memcmp before deeper comparison. 
Experiment shows that the vast majority (~99.99%) of keys with equal hashes have equal bytes. Fast-path that case by doing a memcmp before doing the deeper comparison.

rdar://110478978
2023-10-23 13:04:28 -04:00

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