Low performance with python3 compare to python2 on the same platform
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https://bugs.busybox.net/show_bug.cgi?id=15832
--- Comment #1 from Vincent Fazio <[email protected]> --- What's the output of python -m cProfile test_python.py 10000000 on each?
I do see some variances even in Docker containers but not to that degree. On an rpi CM3 it doesn't take anywhere near the numbers you're posting below (only 8s).
One option would be to profile the python interpreter itself. 3.12 has hooks for perf but they may not be representative of the situation you're seeing as recent interpreters try to perform opcode specialization. Otherwise you may have to build the interpreter with profiling enabled and use another external tool to collect that data.
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https://bugs.busybox.net/show_bug.cgi?id=15832
--- Comment #2 from [email protected] --- (In reply to Vincent Fazio from comment #1)
Thank you for your reply.
Here are the outputs of our test with the cProfile module:
```
# python2 -m cProfile test_python.py 10000000
2 function calls in 18.871 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 18.871 18.871 18.871 18.871 test_python.py:3(<module>)
1 0.000 0.000 0.000 0.000 {method 'disable' of
'_lsprof.Profiler' objects}
# python3 -m cProfile test_python.py 10000000
3 function calls in 53.225 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 53.224 53.224 53.224 53.224 test_python.py:3(<module>)
1 0.000 0.000 53.225 53.225 {built-in method builtins.exec}
1 0.000 0.000 0.000 0.000 {method 'disable' of
'_lsprof.Profiler' objects}
```Is the line built-in method builtins.exec relevant?
On the other hand, I am attempting to profile the cpython interpreter. I recompiled python3 with options --enable-optimizations and --enable-profiling, run my test and got the gmon.out.
I have no time accumulated when I run gprof on the output. So far I have no idea why the profiling output has no result. I need to investigate further.
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https://bugs.busybox.net/show_bug.cgi?id=15832
Yann E. MORIN <[email protected]> changed:
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--- Comment #3 from Yann E. MORIN <[email protected]> --- Thank you for your report.
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