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Visualize Python profiles in the browser

Project description

tuna

CircleCI Code style: black PyPi Version GitHub stars

tuna is a Python profile viewer inspired by the amazing SnakeViz.

Create a runtime profile with

python -mcProfile -o program.prof yourfile.py

or an import profile with

python -X importprofile yourfile.py 2> import.log

and show it with

tuna program.prof

But tuna doesn't show the whole call tree!

Right, and that's because the whole timed call tree cannot be retrieved from profile data. Python developers made the decision to only store parent data in profiles because it can be computed with little overhead. To illustrate, consider the following program.

import time


def a(t0, t1):
    c(t0)
    d(t1)
    return


def b():
    return a(1, 4)


def c(t):
    time.sleep(t)
    return


def d(t):
    time.sleep(t)
    return


if __name__ == "__main__":
    a(4, 1)
    b()

The root process (__main__) calls a() which spends 4 seconds in c() and 1 second in d(). __main__ also calls b() which calls a(), this time spending 1 second in c() and 4 seconds in d(). The profile, however, will only store that c() spent a total of 5 seconds when called from a(), and likewise d(). The information that the program spent more time in c() when called in root -> a() -> c() than when called in root -> b() -> a() -> c() is not present in the profile.

tuna only displays the part of the timed call tree that can be deduced from the profile:

Installation

tuna is available from the Python Package Index, so simply type

pip install -U tuna

to install or upgrade.

Testing

To run the tuna unit tests, check out this repository and type

pytest

Distribution

To create a new release

  1. bump the __version__ number,

  2. tag and upload to PyPi:

    make publish
    

License

tuna is published under the MIT license.

Project details


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