About speedscope
speedscope is an open source, interactive flamegraph viewer. It helps developers see where time is spent in a program by opening profile files in the browser.
What it does
You drag a profile file onto the page or browse for one, and speedscope draws it as a flamegraph you can explore. Keyboard shortcuts help you move around the profile, and the documentation lists the supported file formats. An example profile is available if you want to try the tool first.
Key features
- Opens profile files by drag and drop
- Interactive flamegraph view
- Keyboard shortcuts for navigating profiles
- Built-in example profile to try
- Documented list of supported profile formats
Who it's for
Developers who profile programs and want a quick way to read the results in the browser. It is useful for performance work where a flamegraph is the clearest way to see hot code paths.
Pricing and good to know
speedscope is free and released under the MIT license on GitHub. It runs in the browser, and issues are reported on its GitHub repository.
Highlights
- Opens profile files by drag and drop
- Interactive flamegraph view
- Keyboard shortcuts for navigating profiles
- Built-in example profile to try
- Documented list of supported profile formats
