| commit | ff7b42c194e0fa23e6a76f0a33a80c0c3af14e7d | [log] [tgz] |
|---|---|---|
| author | Kazu Hirata <kazu@google.com> | Sun Nov 24 21:08:54 2024 -0800 |
| committer | GitHub <noreply@github.com> | Sun Nov 24 21:08:54 2024 -0800 |
| tree | 1420d356236d4a090ea76ea38a254a589ced5168 | |
| parent | 9e3215ac167b80dcf51d6693ecdd6275c4e89954 [diff] |
[memprof] Speed up llvm-profdata (#117446)
CallStackRadixTreeBuilder::build takes the parameter
MemProfFrameIndexes by value, involving copies:
std::optional<const llvm::DenseMap<FrameIdTy, LinearFrameId>>
MemProfFrameIndexes
Then "build" makes another copy of MemProfFrameIndexe and passes it to
encodeCallStack for every call stack, which is painfully slow.
This patch changes the type to a pointer so that we don't have to make
a copy every time we pass the argument.
Without this patch, it takes 553 seconds to run "llvm-profdata merge"
on a large MemProf raw profile. This patch shortenes that down to 67
seconds.
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