[sown]

I'm a fan of line_profiler: https://github.com/rkern/line_profiler

        % cat > l.py
        @profile
        def slow_func():
            for i in xrange(1048576):
                continue
            
            return -1
        
        @profile
        def fast_func():
            for i in xrange(10):
                continue
            
            return -1
        @profile
        def the_func():
            for i in xrange(10):
                slow_func()
                fast_func()
                
        if __name__ == "__main__":
            the_func()
            
        % kernprof -l l.py
        % python -m line_profiler l.py.lprof
          Timer unit: 1e-06 s
            
            Total time: 5.21814 s
            File: l.py
            Function: slow_func at line 1
            
            Line #      Hits         Time  Per Hit   % Time  Line Contents
            ==============================================================
                    1                                           @profile
                    2                                           def slow_func():
                    3  10485770      2644263      0.3     50.7      for i in xrange(1048576):
                    4  10485760      2573875      0.2     49.3          continue
                    5                                               
                    6        10            5      0.5      0.0      return -1
            
            Total time: 8.9e-05 s
            File: l.py
            Function: fast_func at line 8
            
            Line #      Hits         Time  Per Hit   % Time  Line Contents
            ==============================================================
                    8                                           @profile
                    9                                           def fast_func():
                    10       110           61      0.6     68.5      for i in xrange(10):
                    11       100           26      0.3     29.2          continue
                    12                                               
                    13        10            2      0.2      2.2      return -1
            
            Total time: 10.5501 s
            File: l.py
            Function: the_func at line 14
            
            Line #      Hits         Time  Per Hit   % Time  Line Contents
            ==============================================================
                    14                                           @profile
                    15                                           def the_func():
                    16        11            3      0.3      0.0      for i in xrange(10):
                    17        10     10549853 1054985.3    100.0          slow_func()
                    18        10          203     20.3      0.0          fast_func()