Message 139300 - Python tracker

➜

This issue tracker has been migrated to GitHub , and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

In-reply-to
Author	alex
Recipients	alex
Date	2011年06月27日.15:29:44
SpamBayes Score	0.00019962502
Marked as misclassified	No
Message-id	<1309188584.96.0.531711570592.issue12422@psf.upfronthosting.co.za>

Content
All storing immutable objects in the memo dict does is slow stuff down, due to having a larger hash table, and on some other Python's causing hilarious levels of GC pressure. Using http://paste.pocoo.org/show/421310/ as a benchmark, CPython get's a 2x speedup on the deepcopy portion, and PyPy a 20x. Patch is attached.

Content

All storing immutable objects in the memo dict does is slow stuff down, due to having a larger hash table, and on some other Python's causing hilarious levels of GC pressure. Using http://paste.pocoo.org/show/421310/ as a benchmark, CPython get's a 2x speedup on the deepcopy portion, and PyPy a 20x. Patch is attached.

History
Date	User	Action	Args
2011年06月27日 15:29:45	alex	set	recipients: + alex
2011年06月27日 15:29:44	alex	set	messageid: <1309188584.96.0.531711570592.issue12422@psf.upfronthosting.co.za>
2011年06月27日 15:29:44	alex	link	issue12422 messages
2011年06月27日 15:29:44	alex	create

homepage