The profiler for agents and humans.

Find it, fix it, share it. Any running program, no code changes.

curl -fsSL https://perfr.dev/install.sh | sh

The service runs on Linux, macOS and Windows. The viewer runs in any browser.

The evolution of Orbit, from its original author.

Drag to pan · wheel over the ruler to zoom · click a thread · right-click a scope · Home to fit Open it on its own

Share a capture with one click: anyone with the link opens it in the browser, no install.

What perfr is

Profile a running program with no code changes, using sampling and dynamic instrumentation. For finer detail, add scopes by hand through bindings for C, C++, Rust, Python, Go and more. See what each records.