tuna
Visualize Python performance profiles
Decision gist · record as of 2026-08-14
Yes. tuna is actively maintained, has no runtime dependencies, supports current Python versions (3.10+), and solves a real problem—accurate profile visualization—that SnakeViz handles incorrectly. The GPLv3 license is a constraint for proprietary use but not a blocker for most development workflows. Install it if you need to understand where your Python code spends time.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Low friction: pure Python wheel with no runtime dependencies.
- Actively maintained as of June 2026, with 1597 repository stars and regular releases since 2018.
License · maintenance · safety
GPL-3.0-or-later (copyleft) — GPLv3 copyleft license. Any derivative work or distribution must also be licensed under GPLv3; using tuna in proprietary projects requires careful consideration of linking and distribution obligations.
last release 2026-05-19 (87 days) · last repo commit 2026-06-16 · 1,597 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 252,687 downloads/mo, #8,537 on PyPI
Alternatives
Verify before relying
pip install tuna
python -mcProfile -o program.prof yourfile.py
tuna program.prof- Whether the web interface requires a specific browser or JavaScript runtime to function.
- Whether tuna can be used programmatically as a library or only as a CLI tool.
- Performance characteristics when analyzing very large profile files.
What it is and what it does
tuna is a lightweight Python profile viewer that reads output from Python's built-in cProfile and importtime profilers and displays them in an interactive web interface. It was designed as a modern alternative to SnakeViz, focusing on accuracy: it only displays timing information that can be reliably reconstructed from profile data, avoiding the incorrect call-tree reconstructions that SnakeViz produces. The tool uses d3 and bootstrap for visualization and has no runtime dependencies, making it quick to install and run.
You generate a profile by running your Python code with cProfile or importtime, then pass the resulting file to tuna's command-line interface. tuna launches a web viewer showing the call tree, function timings, and performance bottlenecks. It also includes IPython magic commands for profiling code directly in notebooks, offering a drop-in replacement for the prun magic.
Use it for
- Identify which functions consume the most CPU time in a Python application.
- Analyze import-time performance to find slow module initialization.
- Debug performance regressions by comparing profiles across code versions.
- Visualize call hierarchies to understand which code paths dominate execution time.
- Profile IPython/Jupyter notebooks using the tuna magic command.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
tuna is actively maintained, has no runtime dependencies, supports current Python versions (3.10+), and solves a real problem—accurate profile visualization—that SnakeViz handles incorrectly. The GPLv3 license is a constraint for proprietary use but not a blocker for most development workflows. Install it if you need to understand where your Python code spends time.
Install
tuna on PyPI
Before you install
Low friction: pure Python wheel with no runtime dependencies. Actively maintained as of June 2026, with 1597 repository stars and regular releases since 2018.
Requires Python 3.10 or later.
License in practice
GPLv3 copyleft license. Any derivative work or distribution must also be licensed under GPLv3; using tuna in proprietary projects requires careful consideration of linking and distribution obligations.
Quickstart
pip install tuna
python -mcProfile -o program.prof yourfile.py
tuna program.profVerify before relying
- Whether the web interface requires a specific browser or JavaScript runtime to function.
- Whether tuna can be used programmatically as a library or only as a CLI tool.
- Performance characteristics when analyzing very large profile files.
Package facts
| License | GPL-3.0-or-later copyleft |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 87 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 252,687 / month, #8,537 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Software Development :: User InterfacesTopic :: Utilities |
Evidence: tuna-0.5.15-py3-none-any.whl
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See also pyprof2calltree · snakeviz · line-profiler · pyinstrument · tensorboard-plugin-profile · scalene · flameprof · fastapi-profiler · keke · guppy3