[all-commits] [llvm/llvm-project] ebd6f7: [NFC][clang-tidy]improve performance for misc-unus...

[Congcong Cai via All-commits]

  Branch: refs/heads/users/ccc/improve-pref-UnusedUsingDeclsCheck
  Home:   https://github.com/llvm/llvm-project
  Commit: ebd6f7648c7b4feeb88061b1127d96cf5e23d098
      https://github.com/llvm/llvm-project/commit/ebd6f7648c7b4feeb88061b1127d96cf5e23d098
  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

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