[Python-ideas] Keep free list of popular iterator objects

[M.-A. Lemburg]

On 15.09.2013 08:26, Kyle Fisher wrote:
> I've realized that my original example is far too complex, so I've
> simplified it:
> 
> Status quo:
> ./python -m timeit -r 100 -s "a=[1]" "iter(a)"
> 10000000 loops, best of 100: 0.0662 usec per loop
> 
> With patch:
> ./python -m timeit -r 100 -s "a=[1]" "iter(a)"
> 10000000 loops, best of 100: 0.0557 usec per loop
> List iter allocations: 6
> List iter reuse through freelist: 1011111554
> 100.00% reuse rate
> 
> Which seems to show a 15% speedup.  I'd be curious what others get.

I'd suggest to open a ticket for this and then continue
the discussion there.

Given how often iterators are used nowadays in Python, a separate
free list may actually make sense (for the same reasons it makes
sense to have around for lists, tuples, etc.).

-- 
Marc-Andre Lemburg
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