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Release Highlights

NVTX 3.6, Python NVTX 0.2.16, and Rust NVTX 2.0.0 are now available for download.

NVTXW ("NVTX Writer")

A new offline C API for feeding pre-collected trace data into a tool through a pluggable backend.

C++

  • Added wrapper APIs for counter and semantic annotations.
  • Added free functions for push/pop ranges that cannot use RAII lifetimes.

Python

  • Added support for counter annotations through the NVTX Counters extension.
  • Added nvtx.writer, a Pythonic interface to NVTXW.

See for NVTX Python release notes for details.

Rust

  • Added no_std support for embedded and kernel environments.
  • Improved reliability with safer error handling, type conversions, and stricter safety-critical linting.
  • Published the NVIDIA NVTX crate to crates.io (renamed to nvtx) with a smoother upgrade path.

Documentation

  • Added an Extended Payloads user guide.
  • Clarified and expanded the extended payload API documentation, closing gaps in the specification.
Source: README.md, updated 2026-08-11