On Sat, 15 Jun 2019 22:02:35 -0600
Neil Schemenauer <nas-pyt...@arctrix.com> wrote:
> On 2019-06-15, Antoine Pitrou wrote:
> > We should evaluate what problem we are trying to solve here, instead
> > of staring at micro-benchmark numbers on an idle system.  
> 
> I think a change to obmalloc is not going to get accepted unless we
> can show it doesn't hurt these micro-benchmarks.  To displace the
> status quo, it has to give other advantages as well.  I don't have
> any agenda or "problem to solve".  After Tim made a PR to allow
> obmalloc to use larger pools, I thought it would be interesting to
> see if a arena mapping scheme based on radix trees should be
> performance competitive.  I'm not proposing any changes to CPython
> at this point.  I'm sharing the results of an experiment.  I thought
> it was interesting.  I guess you don't.

I'm not saying it's not interesting.  I'm just saying that you can't
validate memory allocator changes only on short-running
micro-benchmarks with well-behaved allocation patterns.

Regards

Antoine.
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