Message 151865 - Python tracker

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In-reply-to
Author	vstinner
Recipients	belopolsky, vstinner
Date	2012年01月24日.00:02:44
SpamBayes Score	1.7534768e-07
Marked as misclassified	No
Message-id	<1327363365.73.0.00740710968562.issue13845@psf.upfronthosting.co.za>

Content
Python implements time.time() using gettimeofday() which has only a resolution of 1 microsecond because it uses the timeval structure which is only able to store microseconds. Attached patch changes _PyTime_gettimeofday() to make it uses the timespec structure (which has a resolution has 1 nanosecond) and use GetSystemTimeAsFileTime() on Windows. So time.time() has a theorical resolution 10 times better than currently.

Content

Python implements time.time() using gettimeofday() which has only a resolution of 1 microsecond because it uses the timeval structure which is only able to store microseconds.
Attached patch changes _PyTime_gettimeofday() to make it uses the timespec structure (which has a resolution has 1 nanosecond) and use GetSystemTimeAsFileTime() on Windows. So time.time() has a theorical resolution 10 times better than currently.

History
Date	User	Action	Args
2012年01月24日 00:02:45	vstinner	set	recipients: + vstinner, belopolsky
2012年01月24日 00:02:45	vstinner	set	messageid: <1327363365.73.0.00740710968562.issue13845@psf.upfronthosting.co.za>
2012年01月24日 00:02:45	vstinner	link	issue13845 messages
2012年01月24日 00:02:45	vstinner	create

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