Message 276483 - Python tracker

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Author	methane
Recipients	berker.peksag, methane, minrk, vstinner, xiang.zhang
Date	2016-09-14.20:16:59
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1473884219.69.0.826381374874.issue28147@psf.upfronthosting.co.za>
In-reply-to

Content
This issue is caused by dictresize() and _PyObjectDict_SetItem() 1. a.__dict__.pop('a') convert the dict to combined table which has double keysize. 2. a.a = 1 converts the dict to split table again if there are no instances sharing key with class. As I wrote before, pop, popitem, and del should not increase key size. And _PyObjectDict_SetItem shouldn't convert the dict to split-table when the dict doesn't share keys with the class before calling PyDict_SetItem.

This issue is caused by dictresize() and _PyObjectDict_SetItem()

1. a.__dict__.pop('a') convert the dict to combined table which has double keysize.
2. a.a = 1  converts the dict to split table again if there are no instances sharing key with class.

As I wrote before, pop, popitem, and del should not increase key size.

And _PyObjectDict_SetItem shouldn't convert the dict to split-table when the dict doesn't share keys
with the class before calling PyDict_SetItem.

History
Date	User	Action	Args
2016-09-14 20:16:59	methane	set	recipients: + methane, vstinner, berker.peksag, minrk, xiang.zhang
2016-09-14 20:16:59	methane	set	messageid: <1473884219.69.0.826381374874.issue28147@psf.upfronthosting.co.za>
2016-09-14 20:16:59	methane	link	issue28147 messages
2016-09-14 20:16:59	methane	create