[PATCH] D28068: Whenever reasonable, merge ASAN quarantine batches to save memory.

[Aleksey Shlyapnikov via Phabricator via llvm-commits]

alekseyshl added a comment.

PTAL

Doing even minimal work under cache spin lock on Put proven to be too slow in certain conditions (many threads, many allocations). The spin lock contention hits slow path (__sanitizer::internal_sched_yield()) and context switch results in dramatically slower execution (up to 20x slowdown observed in tests).


https://reviews.llvm.org/D28068