Asked By – rocketmonkeys
I’ve been using cProfile to profile my code, and it’s been working great. I also use gprof2dot.py to visualize the results (makes it a little clearer).
However, cProfile (and most other Python profilers I’ve seen so far) seem to only profile at the function-call level. This causes confusion when certain functions are called from different places – I have no idea if call #1 or call #2 is taking up the majority of the time. This gets even worse when the function in question is six levels deep, called from seven other places.
How do I get a line-by-line profiling?
Instead of this:
function #12, total time: 2.0s
I’d like to see something like this:
function #12 (called from somefile.py:102) 0.5s function #12 (called from main.py:12) 1.5s
cProfile does show how much of the total time “transfers” to the parent, but again this connection is lost when you have a bunch of layers and interconnected calls.
Ideally, I’d love to have a GUI that would parse through the data, then show me my source file with a total time given to each line. Something like this:
main.py: a = 1 # 0.0s result = func(a) # 0.4s c = 1000 # 0.0s result = func(c) # 5.0s
Then I’d be able to click on the second “func(c)” call to see what’s taking up time in that call, separate from the “func(a)” call. Does that make sense?
Now we will see solution for issue: How can I profile Python code line-by-line?
I believe that’s what Robert Kern’s line_profiler is intended for. From the link:
File: pystone.py Function: Proc2 at line 149 Total time: 0.606656 s Line # Hits Time Per Hit % Time Line Contents ============================================================== 149 @profile 150 def Proc2(IntParIO): 151 50000 82003 1.6 13.5 IntLoc = IntParIO + 10 152 50000 63162 1.3 10.4 while 1: 153 50000 69065 1.4 11.4 if Char1Glob == 'A': 154 50000 66354 1.3 10.9 IntLoc = IntLoc - 1 155 50000 67263 1.3 11.1 IntParIO = IntLoc - IntGlob 156 50000 65494 1.3 10.8 EnumLoc = Ident1 157 50000 68001 1.4 11.2 if EnumLoc == Ident1: 158 50000 63739 1.3 10.5 break 159 50000 61575 1.2 10.1 return IntParIO
This question is answered By – Joe Kington
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