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flutter / third_party / perfetto / refs/heads/dev/altimin/transform_column
commit367a5d948e6d57e7beae23b7d9bdad2eb7f5185b[log] [tgz]
authorAlexander Timin <alexander@timin.me>Mon Oct 20 00:36:08 2025 +0100
committerAlexander Timin <alexander@timin.me>Mon Nov 03 21:42:50 2025 +0000
tree7c8b79faa7ff62997ae69b991898b4dec3c12bd0
parent9a8645a12cd03303e921ea9c1e5938f96ad45fe1 [diff]
ui: add support for transforming columns in table viewer

Initial version of supporting transformation of the table columns in the table
viewer. For now, transformations of the string columns are supported:
- length
- substr
- extract_regexp
- remove_prefix / remove_suffix
4 files changed
tree: 7c8b79faa7ff62997ae69b991898b4dec3c12bd0
  1. .github/
  2. bazel/
  3. build_overrides/
  4. buildtools/
  5. contrib/
  6. debian/
  7. docs/
  8. examples/
  9. gn/
  10. include/
  11. infra/
  12. protos/
  13. python/
  14. src/
  15. test/
  16. third_party/
  17. tools/
  18. ui/
  19. .bazelignore
  20. .bazelrc
  21. .bazelversion
  22. .clang-format
  23. .clang-tidy
  24. .git-blame-ignore-revs
  25. .gitallowed
  26. .gitattributes
  27. .gitignore
  28. .gn
  29. .style.yapf
  30. AGENTS.md
  31. Android.bp
  32. Android.bp.extras
  33. BUILD
  34. BUILD.extras
  35. BUILD.gn
  36. CHANGELOG
  37. codereview.settings
  38. CONTRIBUTORS.txt
  39. DIR_METADATA
  40. heapprofd.rc
  41. LICENSE
  42. meson.build
  43. METADATA
  44. MODULE.bazel
  45. MODULE.bazel.lock
  46. MODULE_LICENSE_APACHE2
  47. OWNERS
  48. perfetto.rc
  49. perfetto_flags.aconfig
  50. PerfettoIntegrationTests.xml
  51. persistent_cfg.pbtxt
  52. README.chromium
  53. README.md
  54. TEST_MAPPING
  55. traced_perf.rc
  56. WATCHLISTS
  57. WORKSPACE
README.md

Perfetto - System profiling, app tracing and trace analysis

Perfetto is an open-source suite of SDKs, daemons and tools which use tracing to help developers understand the behaviour of complex systems and root-cause functional and performance issues on client and embedded systems.

It is a production-grade tool that is the default tracing system for the Android operating system and the Chromium browser.

Core Components

Perfetto is not a single tool, but a collection of components that work together:

  • High-performance tracing daemons: For capturing tracing information from many processes on a single machine into a unified trace file.
  • Low-overhead tracing SDK: A C++17 library for direct userspace-to-userspace tracing of timings and state changes in your application.
  • Extensive OS-level probes: For capturing system-wide context on Android and Linux (e.g. scheduling states, CPU frequencies, memory profiling, callstack sampling).
  • Browser-based UI: A powerful, fully local UI for visualizing and exploring large, multi-GB traces on a timeline. It works in all major browsers, requires no installation, and can open traces from other tools.
  • SQL-based analysis library: A powerful engine that allows you to programmatically query traces using SQL to automate analysis and extract custom metrics.

Why Use Perfetto?

Perfetto was designed to be a versatile and powerful tracing system for a wide range of use cases.

  • For Android App & Platform Developers: Debug and root-cause functional and performance issues like slow startups, dropped frames (jank), animation glitches, low memory kills, and ANRs. Profile both Java/Kotlin and native C++ memory usage with heap dumps and profiles.
  • For C/C++ Developers (Linux, macOS, Windows): Use the Tracing SDK to instrument your application with custom trace points to understand its execution flow, find performance bottlenecks, and debug complex behavior. On Linux, you can also perform detailed CPU and native heap profiling.
  • For Linux Kernel & System Developers: Get deep insights into kernel behavior. Perfetto acts as an efficient userspace daemon for ftrace, allowing you to visualize scheduling, syscalls, interrupts, and custom kernel tracepoints on a timeline.
  • For Chromium Developers: Perfetto is the tracing backend for chrome://tracing. Use it to debug and root-cause issues in the browser, V8, and Blink.
  • For Performance Engineers & SREs: Analyze and visualize a wide range of profiling and tracing formats, not just Perfetto's. Use the powerful SQL interface to programmatically analyze traces from tools like Linux perf, macOS Instruments, Chrome JSON traces, and more.

Getting Started

We‘ve designed our documentation to guide you to the right information as quickly as possible, whether you’re a newcomer to performance analysis or an experienced developer.

  1. New to tracing? If you're unfamiliar with concepts like tracing and profiling, start here:

  2. Ready to dive in? Our “Getting Started” guide is the main entry point for all users. It will help you find the right tutorials and documentation for your specific needs:

  3. Want the full overview? For a comprehensive look at what Perfetto is, why it's useful, and who uses it, see our main documentation page:

Community & Support

Have questions? Need help?

We follow Google's Open Source Community Guidelines.