Make sure you have Austin (<a href="https://github.com/P403n1x87/austin" rel="nofollow">https://github.com/P403n1x87/austin</a>) installed.<p>See <a href="https://p403n1x87.github.io/how-to-bust-python-performance-issues.html" rel="nofollow">https://p403n1x87.github.io/how-to-bust-python-performance-i...</a> for an example.