Message 259617 - Python tracker

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Author	yselivanov
Recipients	pitrou, serhiy.storchaka, vstinner, yselivanov
Date	2016-02-05.02:07:53
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1454638074.35.0.0871962001647.issue26289@psf.upfronthosting.co.za>
In-reply-to

Content
The attached patch optimizes floor division for ints. ### spectral_norm ### Min: 0.319087 -> 0.289172: 1.10x faster Avg: 0.322564 -> 0.294319: 1.10x faster Significant (t=21.71) Stddev: 0.00249 -> 0.01277: 5.1180x larger -m timeit -s "x=22331" "x//2;x//3;x//4;x//5;x//6;x//7;x//8;x/99;x//100;" with patch: 0.298 without: 0.515

The attached patch optimizes floor division for ints.

### spectral_norm ###
Min: 0.319087 -> 0.289172: 1.10x faster
Avg: 0.322564 -> 0.294319: 1.10x faster
Significant (t=21.71)
Stddev: 0.00249 -> 0.01277: 5.1180x larger


-m timeit -s "x=22331" "x//2;x//3;x//4;x//5;x//6;x//7;x//8;x/99;x//100;"

with patch: 0.298
without:    0.515

History
Date	User	Action	Args
2016-02-05 02:07:54	yselivanov	set	recipients: + yselivanov, pitrou, vstinner, serhiy.storchaka
2016-02-05 02:07:54	yselivanov	set	messageid: <1454638074.35.0.0871962001647.issue26289@psf.upfronthosting.co.za>
2016-02-05 02:07:54	yselivanov	link	issue26289 messages
2016-02-05 02:07:53	yselivanov	create