• Michael Lippautz's avatar
    cppgc: Add micro benchmark for tracing objects · 5ab27690
    Michael Lippautz authored
    The benchmarks cover static vs dynamic tracing of an object where the
    header is computed statically vs using the object start bitmap,
    respectively.
    
    $ out/x64.release/cppgc_basic_benchmarks --benchmark_filter=Trace/*
    
    Running out/x64.release/cppgc_basic_benchmarks
    Run on (56 X 3500 MHz CPU s)
    CPU Caches:
      L1 Data 32 KiB (x28)
      L1 Instruction 32 KiB (x28)
      L2 Unified 256 KiB (x28)
      L3 Unified 35840 KiB (x2)
    Load Average: 0.24, 0.26, 0.26
    --------------------------------------------------------
    Benchmark              Time             CPU   Iterations
    --------------------------------------------------------
    Trace/Static        1.78 ns         1.78 ns    393324147
    Trace/Dynamic       3.27 ns         3.27 ns    215078276
    
    2020-07-03T15: 21:25+02:00
    Change-Id: I8bf5a8ed71a8991873160353e26f96214c038730
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2280099
    Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
    Reviewed-by: 's avatarAnton Bikineev <bikineev@chromium.org>
    Reviewed-by: 's avatarOmer Katz <omerkatz@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#68675}
    5ab27690
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