alexmojaki/heartrate

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1840 stars · 121 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Python library that provides a real-time visualisation of program execution, showing line hit counts, recent activity bars, and a live stacktrace in a browser. It traces selected files via a simple trace() call and serves the visualisation from a local HTTP server.

Use cases

• visualize which lines of my Python code execute in real time
• see how often each line is hit while my program runs
• debug a Python program with a live stacktrace in the browser
• trace execution of specific files in a Python app
• understand program flow of a running Python script

When to choose

• you want lightweight, zero-config execution visualisation for a Python script
• you need a quick visual sense of hot code paths and current execution point
• you prefer a browser-based live view over a full debugger

When to avoid

• you need step debugging, breakpoints, or variable inspection - use a full debugger like pdb or IDE debuggers
• you need production-grade profiling with performance metrics
• you need multi-threaded tracing out of the box - each thread must be traced separately

Facets

library · maturity maintenance

monitoring developer-tools data-visualization developer-tools python cross-platform debugger code-visualization line-tracing live-stacktrace profiling debugging python web-server

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markdown · JSON · MCP: product_card(name="alexmojaki/heartrate")