.. _sec-request-profiling: Profiling requests ================== Once you have a development environment set up, you will need to launch OctoPrint using ``serve --debug`` as parameters. At this point, you are able to make the exact same requests as before. To profile a specific request, just add ``?perfprofile`` or ``&perfprofile`` to the request parameters. The request will be rendered as usual, but you will receive an html document with the profiling results instead of the contents of the response. Errors ------ If you receive a ``500: Internal Server Error`` and a ``ModuleNotFoundError: No module named 'pyinstrument'`` in the console, you didn't install development dependencies. Do that now using ``pip install -e '.[develop]'``.