Author larry
Recipients Mark.Shannon, eric.snow, jeremy.kloth, jkloth, larry, maciej.szulik, nanjekyejoannah, ncoghlan, phsilva, rhettinger, shihai1991, vstinner
Date 2020-03-17.18:17:23
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Message-id <1584469043.32.0.622554823246.issue39511@roundup.psfhosted.org>
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> The problem with having a single immortal `None`, is that it will
> cause data cache thrashing as two different CPUs modify the
> refcount on the shared `None` object.

That's a very reasonable theory. Personally, I find modern CPU architecture bewildering and unpredictable.  So I'd prefer it if somebody tests such performance claims, rather than simply asserting them and having that be the final design.
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Date User Action Args
2020-03-17 18:17:23larrysetrecipients: + larry, rhettinger, ncoghlan, vstinner, jkloth, phsilva, jeremy.kloth, Mark.Shannon, eric.snow, maciej.szulik, nanjekyejoannah, shihai1991
2020-03-17 18:17:23larrysetmessageid: <1584469043.32.0.622554823246.issue39511@roundup.psfhosted.org>
2020-03-17 18:17:23larrylinkissue39511 messages
2020-03-17 18:17:23larrycreate