[PATCH] D52242: [sanitizer] Destroy and close a range's vmar if all its memory was unmapped

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad added a comment.

Some before & after numbers for one of the benchmarks involved:

  1552377     207294    1121659    2214385    1550481 nanoseconds              N/A Thread/CreateAndJoin
  451883      35547     374475     984192     448331 nanoseconds              N/A Thread/CreateAndJoin


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D52242