[all-commits] [llvm/llvm-project] e03613: [scudo] Add a Timer class to assist performance me...

[ChiaHungDuan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e0361396c2281a108a36d186161ace1843925431
      https://github.com/llvm/llvm-project/commit/e0361396c2281a108a36d186161ace1843925431
  Author: Chia-hung Duan <chiahungduan at google.com>
  Date:   2023-03-23 (Thu, 23 Mar 2023)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/CMakeLists.txt
    M compiler-rt/lib/scudo/standalone/tests/CMakeLists.txt
    A compiler-rt/lib/scudo/standalone/tests/timing_test.cpp
    A compiler-rt/lib/scudo/standalone/timing.cpp
    A compiler-rt/lib/scudo/standalone/timing.h

  Log Message:
  -----------
  [scudo] Add a Timer class to assist performance measurement

Add Timer and TimingManager which provide convenient way to meause the
execution time of code snippets. The output looks like,

```
-- Average Operation Time -- -- Name (# of Calls) --
          1747.2(ns)            popBatch (59)
            92.3(ns)            popBatchImpl (73)
           101.6(ns)              EmptyBatchProcess (5)
          2587.0(ns)            pushBlocksImpl (13)
```

Note that `EmptyBatchProcess` is nested under the timer `popBatchImpl`.

Reviewed By: cferris

Differential Revision: https://reviews.llvm.org/D143626