[clang] [analyzer] Workaround for unintended slowdown (scope increase) (PR #136720)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

> But I was shocked that sometimes intuition fails, and we didn't check the RT for that patch.

This is a legacy project with many skeletons hidden in various closets... The main moral of this story is probably that we should be more paranoid about measuring runtime (I'm thinking about whether we can set up some regular or semi-regular runtime measurements in our CI), but this also shows why we should work on reducing the technical debt.

https://github.com/llvm/llvm-project/pull/136720