Message 81750 - Python tracker

Message81750

Author	pitrou
Recipients	LambertDW, Rhamphoryncus, chemacortes, jcea, mark.dickinson, pitrou, rhettinger
Date	2009-02-12.12:09:20
SpamBayes Score	0.015705584
Marked as misclassified	No
Message-id	<1234440604.7414.14.camel@fsol>
In-reply-to	<1234429046.69.0.362401801997.issue5186@psf.upfronthosting.co.za>

Content
> Other than that, the patch looks fine to me; x ^= x >> 4 would be fine > too. I've just tried x ^= x >> 4 and the speedup is smaller on our microbenchmark (time_object_hash.py). I conjecture that trying to maintain the sequentiality of adresses may have beneficial cache locality effects. Should we care?

Content

> Other than that, the patch looks fine to me;  x ^= x >> 4 would be fine  
> too.

I've just tried x ^= x >> 4 and the speedup is smaller on our
microbenchmark (time_object_hash.py). I conjecture that trying to
maintain the sequentiality of adresses may have beneficial cache
locality effects. Should we care?

History
Date	User	Action	Args
2009-02-12 12:09:21	pitrou	set	recipients: + pitrou, rhettinger, jcea, chemacortes, mark.dickinson, Rhamphoryncus, LambertDW
2009-02-12 12:09:20	pitrou	link	issue5186 messages
2009-02-12 12:09:20	pitrou	create