demonstration gevent and line_profiler playing nicely together (note: gevent.sleep(0) counts as all the time it spends waiting; if the primary case of sleeps is waiting for network or CPU bound tasks, this is valid; e.g. under high load this profiling will start to break down)

gevent_profile_test.py

import gevent
import hashlib
import os

import line_profiler

profiler = line_profiler.LineProfiler()


@profiler
def task_one():
    for i in range(100):
        os.urandom(1024)
        gevent.sleep(0)


def task_two():
    for i in range(1000):
        hashlib.md5(repr(i)).digest()
        gevent.sleep(0)


if __name__ == "__main__":
    gr1 = gevent.spawn(task_one)
    gr2 = gevent.spawn(task_two)
    gr1.join(30)
    gr2.join(10)
    profiler.print_stats()

output.txt

$ python gevent_profile_test.py
Timer unit: 6.98413e-08 s

File: gevent_profile_test.py
Function: task_one at line 10
Total time: 0.0149639 s

Line #      Hits         Time  Per Hit   % Time  Line Contents
==============================================================
    10                                           @profiler
    11                                           def task_one():
    12       101         3157     31.3      1.5      for i in range(100):
    13       100        97349    973.5     45.4          os.urandom(1024)
    14       100       113750   1137.5     53.1          gevent.sleep(0)