mstange/samply

Health v2 · maintenance only

Adoption not part of the score

4392 stars · 102 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Samply is a command-line sampling CPU profiler for macOS, Linux, and Windows that records profiles of arbitrary commands and displays them in the Firefox profiler UI. It collects per-thread stack traces at high frequency (default 1000Hz) and serves symbol and source information via a local webserver.

Use cases

• profile a command-line application's CPU usage
• generate flame graphs for a program
• find which functions consume the most time in my code
• sample stack traces per thread at 1000Hz
• view a CPU profile in the Firefox profiler
• profile off-cpu time waiting on locks on macOS or Windows
• record a shareable performance profile of a build tool

When to choose

• you want a zero-config CLI profiler that works across macOS, Linux, and Windows
• you prefer the Firefox profiler UI with flame graphs, timelines, and source views
• you need high-frequency sampling with per-thread stack traces
• you want profiles kept local with optional sharing via upload

When to avoid

• you need continuous production monitoring or always-on profiling
• you need off-CPU analysis on Linux, which samply does not yet support
• you prefer integrated IDE profilers or tools like perf's own reporting UI

Facets

cli-tool · maturity active

benchmarking monitoring cli developer-tools developer-tools performance windows cli rust cpu-profiler sampling-profiler flame-graph firefox-profiler profiling command-line macos linux

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