CMake Instrumentation!

Image below is from default build of https://github.com/steve-downey/optional/tree/cmakeinstrument .

It spends all its time building gtest. :sad:

@Sdowney fused gtest is kinda slow to build, I ended up building it with optimizations disabled since it didn’t affect test performance much
@vitaut
I'm split between working on its build time and just switching to something lighter weight.
I really had no idea it was dominating the build time that way. Builds tend to show when things start, not when they end.