[PATCH] D102487: Avoid underestimating the number of DIEs for a given debug info size.

[Simon Giesecke via Phabricator via llvm-commits]

simon.giesecke added a comment.

I came across this when analyzing a perf profile of running llvm-gsymutil. I noticed that quite a lot of time was spent in resizing the DieArray, and then checking the actual number of entries relative to getDebugInfoSize() and found it to be rather in the range of 6-12 bytes (in most cases 6-8 actually). This was a RelWithDebInfo build using clang 12.

Surely, this is purely anecdotal. I don't know where the original estimate of 14-20 bytes came from either.


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  https://reviews.llvm.org/D102487/new/

https://reviews.llvm.org/D102487