Author pitrou
Recipients Danilo Shiga, Jelle Zijlstra, mark.dickinson, martin.panter, osantana, pitrou, serhiy.storchaka
Date 2017-05-25.10:13:54
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Message-id <1495707234.79.0.292099278273.issue30441@psf.upfronthosting.co.za>
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> Isn't list(dict) atomic? At least in CPython.

I doubt it. There's no special code for list(dict), it uses regular iteration which could probably hit the GC and then release the GIL.

> I suspect that protecting *all* accesses to _data with a lock will hit the performance and invalidate the reason of using _data for caching.

I'm not convinced os.environ is performance-critical.  Perhaps getenv() is really expensive on some systems?
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Date User Action Args
2017-05-25 10:13:54pitrousetrecipients: + pitrou, mark.dickinson, martin.panter, serhiy.storchaka, osantana, Jelle Zijlstra, Danilo Shiga
2017-05-25 10:13:54pitrousetmessageid: <1495707234.79.0.292099278273.issue30441@psf.upfronthosting.co.za>
2017-05-25 10:13:54pitroulinkissue30441 messages
2017-05-25 10:13:54pitroucreate