[libcxx-commits] [PATCH] D75954: Cache uwnind frame headers as they are found.

[Sterling Augustine via Phabricator via libcxx-commits]

saugustine created this revision.
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This improves unwind performance quite substantially, and follows
a somewhat similar approach used in libgcc_s as described in the
thread here:

https://gcc.gnu.org/ml/gcc/2005-02/msg00625.html

On certain extremely exception heavy internal tests, the time
drops from about 80 minutes to about five minutes.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D75954

Files:
  libunwind/src/AddressSpace.hpp
  libunwind/src/FrameHeaderCache.hpp

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