How can I profile Python functions line-by-line in Google App Engine?

Question

I'd like to use line_profiler to profile a single large method line by line in my GoogleAppEngine application.

Unfortunately GAE doesn't seem to let you import .so libraries, even on a local dev server.

How could I go about achieving my goal? I'd be happy to use a python-only solution, if there's one out there, or take suggestions as to how to write my own.

Can you [*try this*](http://stackoverflow.com/a/4299378/23771)? — Mike Dunlavey, Sep 25 '12 at 20:33
The stdlib cProfile module works. See e.g. http://code.google.com/p/rietveld/source/browse/main.py#74 — Guido van Rossum, Sep 26 '12 at 04:17
Do you need to profile this method in the development server or in production? — proppy, Nov 15 '12 at 23:14

score 0 · Answer 1 · answered Jan 28 '13 at 03:49

Use gae_mini_profiler.

It can either keep track of all function calls and their timings (instrumented) or can periodically examine the call stack to figure out in which functions time is being spent during a request (sampling). You can see an example of it in action here - http://mini-profiler.appspot.com/

How can I profile Python functions line-by-line in Google App Engine?

1 Answers1