[all-commits] [llvm/llvm-project] dca6f6: [NFC][clang-tidy]improve performance for misc-unus...

[Congcong Cai via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dca6f60bcdd4a8e6c5defad454d9c470a27701fe
      https://github.com/llvm/llvm-project/commit/dca6f60bcdd4a8e6c5defad454d9c470a27701fe
  Author: Congcong Cai <congcongcai0907 at 163.com>
  Date:   2024-01-16 (Tue, 16 Jan 2024)

  Changed paths:
    M clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.cpp
    M clang-tools-extra/clang-tidy/misc/UnusedUsingDeclsCheck.h

  Log Message:
  -----------
  [NFC][clang-tidy]improve performance for misc-unused-using-decls check (#78231)

`UnusedUsingDeclsCheck::removeFromFoundDecls` will be called with high
frequency. At current time it will check every `Context`.
This patch adds a cache to reduce algorithm complexity.