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The test suite spends 20% of it's time in gc.collect() #6705
Description
Thu Jul 07 14:33:31 2016 matplotlib_cProfile_fulltest.pstat
192634679 function calls (182051956 primitive calls) in 345.231 seconds
Ordered by: internal time
List reduced from 9374 to 3 due to restriction <3>
ncalls tottime percall cumtime percall filename:lineno(function)
2986 75.105 0.025 75.107 0.025 {gc.collect}
1250 19.139 0.015 19.139 0.015 {matplotlib._png.write_png}
2257 9.801 0.004 9.801 0.004 {matplotlib._png.read_png_int}
Mostly this is due to this call
Python is very memory effective because of reference counting (object is freed when refcount drops to zero even with gc.disable) and gc.collect only forces him to run cyclic garbage collector immediately. If it is not acceptable to to remove this call, can we have option to tuning this?
Activity
tacaswell commentedon Jul 8, 2016
👍 on removing that line.
That line went in in 42fa2b6 where @mdboom notes it makes debugging memory usage easier. However, I am willing to trade 20% on the tests for inflicting pain on the dev who does memory debugging 😈 .
Kojoley commentedon Jul 8, 2016
We can add turnable plugin for this case.