VizTracer

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library 1.1.1 ·python
verified May 22, 2026

VizTracer is a low-overhead logging, debugging, and profiling tool for Python that traces and visualizes code execution on a timeline. It supports multi-threading, multi-processing, asyncio, and PyTorch, and the front-end UI is powered by Perfetto. The current version is 1.1.1, and it has a regular release cadence with recent releases approximately every 1-2 months.

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