Message 300123 - Python tracker

Message300123

Author	yselivanov
Recipients	methane, vstinner, yselivanov
Date	2017-08-10.21:46:08
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1502401568.1.0.958545967471.issue31179@psf.upfronthosting.co.za>
In-reply-to

Content
>> PyDict_Copy creates a new empty dict object and then inserts key/values into it one by one. > Why not creating a "preallocated" dict in that case? _PyDict_NewPresized() I don't think it's related to the proposed patch. Please take a look at the PR. `_PyDict_NewPresized` and inserting entries one by one will not be faster than a `memcpy`.

Content

>> PyDict_Copy creates a new empty dict object and then inserts key/values into it one by one.

> Why not creating a "preallocated" dict in that case? _PyDict_NewPresized()

I don't think it's related to the proposed patch.  Please take a look at the PR.  `_PyDict_NewPresized` and inserting entries one by one will not be faster than a `memcpy`.

History
Date	User	Action	Args
2017-08-10 21:46:08	yselivanov	set	recipients: + yselivanov, vstinner, methane
2017-08-10 21:46:08	yselivanov	set	messageid: <1502401568.1.0.958545967471.issue31179@psf.upfronthosting.co.za>
2017-08-10 21:46:08	yselivanov	link	issue31179 messages
2017-08-10 21:46:08	yselivanov	create