llvm-project

aee51b4d - [clang-tidy][NFC] optimize cache for config option (#121406)

[clang-tidy][NFC] optimize cache for config option (#121406) Current implement will cache `OptionsSource` for each path, it will create lots of copy of `OptionsSource` when project has deep nested folder structure. New implement use vector to store `OptionsSource` and only cache the index. It can reduce memory usage and avoid meaningless copy.