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  Commit

• Author : Behdad Esfahbod
  Date : 2023-08-09 12:00:41
  Hash : 9a7afe92
  Message : [perf] Benchmark glyph painting

• Files
• Makefile.am
• README.md
• benchmark-font.cc
• benchmark-map.cc
• benchmark-ot.cc
• benchmark-set.cc
• benchmark-shape.cc
• benchmark-subset.cc
• fonts
• meson.build
• texts

• README.md

• Building and Running

  Benchmarks are implemented using Google Benchmark.

  To build the benchmarks in this directory you need to set the benchmark option while configuring the build with meson:

  meson build -Dbenchmark=enabled --buildtype=release
  

  or:

  meson build -Dbenchmark=enabled --buildtype=debugoptimized
  

  Then build a specific benchmark binaries with ninja:

  ninja -Cbuild perf/benchmark-set
  

  or just build the whole project:

  ninja -Cbuild
  

  Finally, to run one of the benchmarks:

  ./build/perf/benchmark-set
  

  It's possible to filter the benchmarks being run and customize the output via flags to the benchmark binary. See the Google Benchmark User Guide for more details.

  Profiling

  Configure the build to include debug information for profiling:

  CXXFLAGS="-fno-omit-frame-pointer" meson --reconfigure build -Dbenchmark=enabled --buildtype=debug
  ninja -Cbuild
  

  Then run the benchmark with perf:

  perf record -g build/perf/benchmark-subset --benchmark_filter="BM_subset_codepoints/subset_notocjk/100000" --benchmark_repetitions=5
  

  You probably want to filter to a specific benchmark of interest and set the number of repititions high enough to get a good sampling of profile data.

  Finally view the profile with:

  perf report