VizTracer, trace and visualize your Python code execution

In plain words

VizTracer is a Python code execution tracer and visualizer that records how programs run and displays the results visually. It helps developers understand program flow and performance by showing which functions execute, how long they take, and in what order. Developers use it to debug, optimize, and analyze Python applications. The tool is available on GitHub and launched in 2020.

written from the facts on this page · September 2026

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