Message 383777 - Python tracker

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In-reply-to
Author	vstinner
Recipients	vstinner
Date	2020年12月25日.22:50:34
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1608936634.73.0.0790209715879.issue42745@roundup.psfhosted.org>

Content
Currently, the type lookup cache is shared by all interpreter which causes multiple issues: * The version tag is currently protected by the GIL, but it would require a new lock if the GIL is made per interpreter (bpo-40512) * Clearing the cache in an interpreter clears the cache in all interpreters * The cache has a fixed size of 4096 entries. The cache misses increase with the number of interpreters, since each interpreter has its own types. I propose to make the type lookup cache per interpreter.

Content

Currently, the type lookup cache is shared by all interpreter which causes multiple issues:
* The version tag is currently protected by the GIL, but it would require a new lock if the GIL is made per interpreter (bpo-40512)
* Clearing the cache in an interpreter clears the cache in all interpreters
* The cache has a fixed size of 4096 entries. The cache misses increase with the number of interpreters, since each interpreter has its own types.
I propose to make the type lookup cache per interpreter.

History
Date	User	Action	Args
2020年12月25日 22:50:34	vstinner	set	recipients: + vstinner
2020年12月25日 22:50:34	vstinner	set	messageid: <1608936634.73.0.0790209715879.issue42745@roundup.psfhosted.org>
2020年12月25日 22:50:34	vstinner	link	issue42745 messages
2020年12月25日 22:50:34	vstinner	create

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