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bpo-34093: Stablize FLAG_REF usage (two-pass version) #8293

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bpo-34093: Stablize FLAG_REF usage (two-pass version) #8293

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methane
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@methane methane commented Jul 16, 2018 •
edited by bedevere-bot

@methane
Make marshal stable
e170116 
marshal used refcnt() to decide use FLAG_REF or not.

Even when one object is used only once in marshled object,
FLAG_REF could be used.

This commit makes marshal two-pass.  It counts refs
at first pass.  In second pass, mashal objects and
use FLAG_REF only when the object is used more than twice.
@methane
Make *stable* optional
9d7e8f1
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methane commented Jul 16, 2018

I don't like the option name stable, because it is very unclear what is stable.
It just helps reproducible pyc build.

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Wow, this is very similar to a PR I made for the same problem (before you pointed me here): gh-28379. The biggest difference is that I literally call w_object() twice, where the first pass determines how many times an object is used (and the result bytes are discarded).

@ericsnowcurrently ericsnowcurrently mentioned this pull request Sep 16, 2021
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@methane methane mentioned this pull request May 2, 2022
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@methane methane closed this May 4, 2022
@methane methane deleted the stable-marshal-1 branch May 4, 2022 01:08
@methane methane mentioned this pull request Apr 10, 2022
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