Message 336719 - Python tracker

Message336719

Author	vstinner
Recipients	ammar2, josh.r, larry, serhiy.storchaka, vstinner, xtreak
Date	2019-02-26.22:41:32
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1551220892.48.0.0433733079274.issue36127@roundup.psfhosted.org>
In-reply-to

Content
> How much bigger does the core interpreter + built-in extension modules get when you make this change? How much more memory is used by real world programs? Well, any optimization is a matter of trade-off between memory and CPU. Last years, CPU are not really getting way faster (especially when you consider that Python is usually only able to use a single CPU thread), whereas computers are getting more and more RAM. > It should be tested on a number of systems too; any losses to cache unfriendliness would be highly dependent on the size of the CPU cache. I prefer to no pay too much attention to assumptions on the hardware. I prefer to only trust benchmarks :-)

Content

> How much bigger does the core interpreter + built-in extension modules get when you make this change? How much more memory is used by real world programs?

Well, any optimization is a matter of trade-off between memory and CPU. Last years, CPU are not really getting way faster (especially when you consider that Python is usually only able to use a single CPU thread), whereas computers are getting more and more RAM.


> It should be tested on a number of systems too; any losses to cache unfriendliness would be highly dependent on the size of the CPU cache.

I prefer to no pay too much attention to assumptions on the hardware. I prefer to only trust benchmarks :-)

History
Date	User	Action	Args
2019-02-26 22:41:32	vstinner	set	recipients: + vstinner, larry, serhiy.storchaka, josh.r, ammar2, xtreak
2019-02-26 22:41:32	vstinner	set	messageid: <1551220892.48.0.0433733079274.issue36127@roundup.psfhosted.org>
2019-02-26 22:41:32	vstinner	link	issue36127 messages
2019-02-26 22:41:32	vstinner	create