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Speedscope

by Speedscope Community

Browser-based interactive flamegraph visualizer that imports pprof, perf, Chrome DevTools, and Instruments profiles for collaborative APAC performance investigation without server deployment.

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AIMenta verdict
Decent fit
4/5

"Interactive flamegraph visualizer — APAC developers use Speedscope to explore pprof, perf, and Chrome profiler output as interactive zoomable flamegraphs in the browser, sharing APAC performance profiles for collaborative optimization without deploying servers."

Features
6
Use cases
1
Watch outs
3
What it does

Key features

  • Browser-based: no APAC server required for flamegraph visualization and sharing
  • Multi-format: pprof, Linux perf, Chrome DevTools, Firefox, Instruments for APAC profiles
  • Interactive views: Left Heavy, Sandwich, and time-order flamegraph modes
  • URL sharing: share APAC performance profiles as links for collaborative investigation
  • Self-hostable: run on APAC internal infrastructure for data-sensitive profiles
  • Zero cost: open-source with free hosted speedscope.app for APAC teams
When to reach for it

Best for

  • APAC developers and performance engineers who want on-demand flamegraph visualization for specific incidents without continuous profiling infrastructure — sharing profiles via URL for collaborative APAC team analysis.
Don't get burned

Limitations to know

  • ! No continuous collection — APAC teams must manually capture profiles for each investigation
  • ! Uploaded profiles stored on speedscope.app — use self-hosted for APAC sensitive production data
  • ! No historical profile comparison — point-in-time APAC analysis only, unlike Pyroscope/Parca
Context

About Speedscope

Speedscope is a browser-based interactive flamegraph visualizer that renders CPU and memory profiles — in pprof, Linux perf, Chrome DevTools, Firefox Profiler, Instruments (macOS), Stackprof, and v8 heap formats — as interactive, zoomable flamegraphs without requiring any server deployment. APAC developers and performance engineers use Speedscope to explore profiler output locally (drag-and-drop a .prof file) or share profiles as URLs via the hosted speedscope.app service.

The collaborative profile-sharing use case is Speedscope's distinctive value: an APAC developer captures a pprof profile from a production Go service, uploads it to speedscope.app, and shares the URL with the rest of the APAC team for collaborative performance investigation in a weekly engineering review — without setting up Pyroscope, Parca, or any observability infrastructure. The profile renders as an interactive flamegraph in any browser, enabling APAC team members to zoom, search for specific functions, and switch between Left Heavy, Sandwich, and time-order views.

For APAC backend teams who do not run continuous profiling infrastructure but want to investigate specific performance incidents, Speedscope provides an on-demand profile analysis workflow: capture a profile during the incident, visualize it in Speedscope, identify the hot function, fix it, capture another profile to verify. This lightweight workflow has zero infrastructure dependency and costs nothing.

Speedscope is open-source and can be self-hosted — APAC teams with data sensitivity requirements run it on internal infrastructure rather than using speedscope.app for profile uploads.

Beyond this tool

Where this category meets practice depth.

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