Message 217787 - Python tracker

Message217787

Author	vstinner
Recipients	pitrou, vstinner
Date	2014-05-02.20:51:46
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1399063907.65.0.694619539973.issue21419@psf.upfronthosting.co.za>
In-reply-to

Content
Attached patch modifies long_lshift() to allocate the result using calloc() instead of malloc(). The goal is to avoid allocating physical memory for the least significat digits (zeros). According to my tests in issue #21233 (calloc), Linux and Windows have an optimized calloc() functions and at least Linux avoids allocating memory for pages initialized by zeros until pages at modified.

Content

Attached patch modifies long_lshift() to allocate the result using calloc() instead of malloc(). The goal is to avoid allocating physical memory for the least significat digits (zeros). According to my tests in issue #21233 (calloc), Linux and Windows have an optimized calloc() functions and at least Linux avoids allocating memory for pages initialized by zeros until pages at modified.

History
Date	User	Action	Args
2014-05-02 20:51:47	vstinner	set	recipients: + vstinner, pitrou
2014-05-02 20:51:47	vstinner	set	messageid: <1399063907.65.0.694619539973.issue21419@psf.upfronthosting.co.za>
2014-05-02 20:51:47	vstinner	link	issue21419 messages
2014-05-02 20:51:47	vstinner	create