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Time a block of code

Project description


Time a block of code.

Use as the context expression of a ``with`` statement:

.. code:: pyconsole

>>> from harrison import Timer
>>> with Timer() as t:
>>> ...
>>> print t.elapsed_time_ms

When a description string is passed on initialization, the elapsed time
will be printed on completion, keyed by this description.

.. code:: pyconsole

>>> with Timer('My expensive block of code'):
>>> ...
My expensive block of code: 12345 ms

You can also start and stop a Timer explicitly:

.. code:: py

timer = Timer()

print timer.elapsed_time_s

print timer.elapsed_time_s

You can also time each execution of a function using a decorator:

.. code:: py

from harrison import profile

@profile('Describes the function')
def some_function():

# Without args, the function name (e.g. 'some_function') will be used
# as the description.
def another_function():

You can also use ``RegisteredTimer``, which groups together a bunch of
named timers, provides utilities for serializing their times, and an
optional global timer registry.

Named after John Harrison, the English carpenter and clockmaker who
invented the `marine
chronometer <>`__.

Similar libraries

This is similar to the library
`contexttimer <>`__, but that
library is licensed under the GPLv3 which is more restrictive than
two-clause BSD license used here.


.. code:: sh

pip install -r requirements_dev.txt
rake lint


- Issue Tracker:
- Source Code:

Pull requests welcome!


If you are having issues, please let us know.


The project is licensed under the two-clause BSD license.

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