benfred/py-spy

Health v2 · maintenance only

Adoption not part of the score

15553 stars · 552 forks observed · 2026-10-08

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

py-spy is a sampling profiler for Python programs written in Rust. It visualizes where a running Python process spends time without restarting it or modifying code, making it safe for production use.

Use cases

• profile a running python process without restarting it
• generate flame graphs of python program execution
• find which functions are slow in production python code
• view live top functions consuming CPU in a python app
• dump stack traces of a hung python process
• profile python code with native C extensions

When to choose

• you need low-overhead profiling of live or production Python processes
• you want flame graphs or speedscope profiles without code changes
• you need to diagnose hangs or CPU hotspots in CPython 2.3-3.14

When to avoid

• you need deterministic line-by-line tracing or memory profiling
• you profile non-CPython interpreters like PyPy or Jython
• you need an in-process API for programmatic profiling

Facets

cli-tool · maturity stable

benchmarking monitoring developer-tools cli developer-tools performance windows cli rust python profiler sampling-profiler flame-graph python-profiling production-debugging command-line linux macos

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