[New-bugs-announce] [issue44206] Add a version number to dict keys.

[Mark Shannon]

New submission from Mark Shannon <mark at hotpy.org>:

Add a version number to dict keys.

PEP 509 added a version number to dicts. Unfortunately this is no use for optimizing attribute loads and store on instances.
We need to know whether the keys are as expected, not the dict as that is likely to be different each time.

We can add a 32 bit version number and actually reduce memory use by taking advantage of the redundancy in the rest of the keys object.

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assignee: Mark.Shannon
messages: 394120
nosy: Mark.Shannon, methane, vstinner
priority: normal
severity: normal
stage: needs patch
status: open
title: Add a version number to dict keys.
type: performance

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44206>
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