[llvm-branch-commits] [llvm] [BOLT] Fix counts aggregation in merge-fdata (PR #119652)

[Amir Ayupov via llvm-branch-commits]

aaupov wrote:

> Since you are switching to regex, are there any changes in parsing performance?

With updated version (on top of #119942), it's neutral/slightly faster than current merge-fdata 
> 1.04 ± 0.07 times faster

https://github.com/llvm/llvm-project/pull/119652