rust-lang/measureme

Support crate for rustc's self-profiling feature

391

stars

429

commits

Rust

primary language

Aug 7, 2026

updated

Browse cluster: Rust language tooling and development →

README

measureme

Support crate for rustc's self-profiling feature

This crate is maintained by the Rust compiler team and in particular by the self-profile working group. It is currently only meant to be used within rustc itself, so APIs may change at any moment.

Tools

measureme

measureme is the core library which contains a fast, efficient framework for recording events and serializing them to a compact binary format. It is integrated into rustc via the unstable -Z self-profile flag.

summarize

summarize produces a human readable summary of measureme profiling data. It contains two main modes:

summarize which groups the profiling events and orders the results by time taken.
diff which compares two profiles and outputs a summary of the differences.

stack_collapse

stack_collapse reads measureme profiling data and outputs folded stack traces compatible with the Flame Graph tools.

flamegraph

flamegraph reads measureme profiling data and outputs Flame Graph.

crox

crox turns measureme profiling data into files that can be visualized by the Chromium performance tools.

mmedit

mmedit is for editing .mm_profdata files generated by measureme.

mmview

mmview is for printing the event data generated by measureme.

analyzeme

analyzeme is a library with common functionality for measureme tools.

decodeme

decodeme holds the decoding definitions of the profiling event data from measureme.

How to make a release

Bump version of measureme, decodeme and analyzeme crates in the root Cargo.toml file
- Update both workspace.version and workspace.dependencies.[analyzeme/decodeme/measureme].version
Update changelog with latest changes
- You can use https://github.com/rust-lang/measureme/compare/<last-released-tag>...master to see what has changed since the last released tag
Merge a PR with the changes above (e.g. https://github.com/rust-lang/measureme/pull/240)
Create a git tag based on the merged PR, and push it
Create a GitHub release manually based on that tag, CI will then take care of publishing the crates

Contributors

(top 30 of 40)

156 commits

michaelwoerister

88 commits

29 commits

26 commits

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rust-lang/measureme

Support crate for rustc's self-profiling feature

391

stars

429

commits

Rust

primary language

Aug 7, 2026

updated

Browse cluster: Rust language tooling and development →

README

measureme

Support crate for rustc's self-profiling feature

This crate is maintained by the Rust compiler team and in particular by the self-profile working group. It is currently only meant to be used within rustc itself, so APIs may change at any moment.

Tools

measureme

measureme is the core library which contains a fast, efficient framework for recording events and serializing them to a compact binary format. It is integrated into rustc via the unstable -Z self-profile flag.

summarize

summarize produces a human readable summary of measureme profiling data. It contains two main modes:

summarize which groups the profiling events and orders the results by time taken.
diff which compares two profiles and outputs a summary of the differences.

stack_collapse

stack_collapse reads measureme profiling data and outputs folded stack traces compatible with the Flame Graph tools.

flamegraph

flamegraph reads measureme profiling data and outputs Flame Graph.

crox

crox turns measureme profiling data into files that can be visualized by the Chromium performance tools.

mmedit

mmedit is for editing .mm_profdata files generated by measureme.

mmview

mmview is for printing the event data generated by measureme.

analyzeme

analyzeme is a library with common functionality for measureme tools.

decodeme

decodeme holds the decoding definitions of the profiling event data from measureme.

How to make a release

Bump version of measureme, decodeme and analyzeme crates in the root Cargo.toml file
- Update both workspace.version and workspace.dependencies.[analyzeme/decodeme/measureme].version
Update changelog with latest changes
- You can use https://github.com/rust-lang/measureme/compare/<last-released-tag>...master to see what has changed since the last released tag
Merge a PR with the changes above (e.g. https://github.com/rust-lang/measureme/pull/240)
Create a git tag based on the merged PR, and push it
Create a GitHub release manually based on that tag, CI will then take care of publishing the crates

Similar repos

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Website for graphing performance of rustc

733

shared contributors

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Run experiments across parts of the Rust ecosystem!

764

shared contributors

flamegraph-rs/flamegraph

Easy flamegraphs for Rust projects and everything else, without Perl or pipes <3

6,024

EmbarkStudios/puffin

🐦 Friendly little instrumentation profiler for Rust 🦀

1,740

semgrep/pyro-caml

A statistical continuous profiler for OCaml compatible with Pyroscope

22

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642

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The Rust Function Tracer.

48

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Tracy client libraries for Rust

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Contributors

(top 30 of 40)

156 commits

michaelwoerister

88 commits

29 commits

26 commits

Languages

Rust

100.0%