Re: [Bug gcov-profile/99105] profile streaming scales poorly to projects with many source files

[Jan Hubicka]

> Ah, yeah, that will make a big difference.
> So clang is using 'make check', running a test-suite for a PGO build, right?
It uses 
make check-llvm
make check-clang
and then it rebuilds whole llvm with the instrumented compiler.

Honza