Elixir Profiling with Kcachegrind

Anurag Jain
1 min readAug 26, 2020

There are multiple ways available.

if you want to profile a function then you can use fprof. The problem I see with Fprof is it’s a huge text file and it’s very difficult to interpret. So Kcachegrind will help you in visualising. Here are the steps how can you use Kcachegrind.

Step1 — Download Kcachegrind

incase of mac-os use qcachegrind. (if you have higher mac-os version qcachegrind doesn’t work, you can use these change and create qcachegrind binary for yourself https://github.com/anuragjain67/kcachegrind/tree/qcachegrind_macos_catlina_support)

Step2 — Download erlgrind script


(This will help you in converting fprof output in .grind output.)

Step3 — Create fprof file

Step4 — Convert .fprof file to .cgrind file:

erlgrind outputfile.frof outputfil.cgrind

Step5 — Open this file in kcachegrind or qcachegrind (mac)

Image ref — http://kcachegrind.sourceforge.net/html/Shot3Large.html
Image Ref — http://kcachegrind.sourceforge.net/html/Shot3Large.html