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chromium / chromium / src / 816a39452c97fba8945c55469f96713d436fee7e
commit816a39452c97fba8945c55469f96713d436fee7e[log] [tgz]
authorEgor Pasko <pasko@chromium.org>Mon Jul 04 18:03:23 2022
committerChromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com>Mon Jul 04 18:03:23 2022
treef34e05b5e16c444e89379cd093268c81306fcd39
parent3244b11310257bda1731759df8a141db77d65f47 [diff]
base/android: Revive ThreadInstructionCount::Now()

Convenience wrappers around __NR_perf_event_open. They were recently
removed as part of cleanup in tracing [1].

Bring it back as a standalone utility, only for Android. It allows to
roughly compare performance of two functions that are being called
frequently. Recent example of such estimation: [2].

[1] Remove Support for Instruction Count
    http://crrev.com/1016741

[2] Reduce overhead from numerous calls to IsFeatureEnabled()
    http://crbug.com/1341292

Bug: 1341292
Change-Id: I000f0f823d945efcaf4025964de1dbd1025db580
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3738191
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Egor Pasko <pasko@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1020632}
3 files changed
tree: f34e05b5e16c444e89379cd093268c81306fcd39
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython
  61. .vpython3
  62. .yapfignore
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. ENG_REVIEW_OWNERS
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

Logo Chromium

Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web.

The project's web site is https://www.chromium.org.

To check out the source code locally, don't use git clone! Instead, follow the instructions on how to get the code.

Documentation in the source is rooted in docs/README.md.

Learn how to Get Around the Chromium Source Code Directory Structure .

For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.

If you found a bug, please file it at https://crbug.com/new.