> On 27 Mar 2022, at 18:16, Jonathan Fine <jfine2...@gmail.com> wrote: > > Hi > > Thank you Inada for your prompt and helpful reply. Here's a link for cached > hash in bytes object: https://bugs.python.org/issue46864 > <https://bugs.python.org/issue46864> > > What I have in mind is making selected objects smaller, for example by using > smaller pointers. But how to know the performance benefit this will give?
That will limit python to 2GiB or maybe 4GiB of memory - I routinely run beyond that size in production systems. There is a memory model that GCC supports that is 32bit pointers and 64bit ints. I do not recall the performance comparisons, buts it is not used very much. > > I think it would be helpful to know how much SLOWER things are when we make > Python objects say 8 or 16 bytes LARGER. This would give an estimate of the > improvement from making all Python objects smaller. > > I've not done much performance testing before. Anyone here interested in > doing it, or helping me do it? (Warning - I've never built Python before.) Performance tests is hard to get right. I do this as my day job for a big Cloud app written mostly in Python. There is an excellent book on performance measurement by Brendan Greg "Systems Performance; Enterprise and the Cloud". Barry > > with best regards > > Jonathan > _______________________________________________ > Python-ideas mailing list -- python-ideas@python.org > To unsubscribe send an email to python-ideas-le...@python.org > https://mail.python.org/mailman3/lists/python-ideas.python.org/ > Message archived at > https://mail.python.org/archives/list/python-ideas@python.org/message/PMDNJFXMWXU3LQH5KXO4MM5SCGSP2J4P/ > Code of Conduct: http://python.org/psf/codeofconduct/
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