Home Original page

[Python-Dev] "Global freepool"

Serhiy Storchaka storchaka at gmail.com
Thu Jun 1 16:16:53 EDT 2017 
01.06.17 21:44, Larry Hastings пише:
> p.s. Speaking of freelists, at one point Serhiy had a patch adding a 
> freelist for single- and I think two-digit ints.  Right now the only int 
> creation optimization we have is the array of constant "small ints"; if 
> the int you're constructing isn't one of those, we use the normal slow 
> allocation path with PyObject_Alloc etc.  IIRC this patch made things 
> faster.  Serhiy, what happened to that patch?  Was it actually a bad 
> idea, or did it just get forgotten?

The issue [1] still is open. Patches neither applied nor rejected. They 
exposes the speed up in microbenchmarks, but it is not large. Up to 40% 
for iterating over enumerate() and 5-7% for hard integer computations 
like base85 encoding or spectral_norm benchmark.

[1] https://bugs.python.org/issue25324
More information about the Python-Dev mailing list