[Kde-pim] Review Request: Reuse QString instances in parseAddrList

[Volker Krause]

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Ship it!


Currently there's only one user of ItemFetchJob (and thus this code) in threads I'm aware of, the legacy KRes compat bridges. Since it's supported and working, I think we need the mutex to keep it that way, even if not used much right now.

I've looked at KMime AddrSpec/Mailbox, which probably should be changed to storing the joint version rather than three parts, but that can't be easily done in a BC way, the members are not in a private class.

- Volker Krause


On Oct. 13, 2012, 8:06 p.m., Milian Wolff wrote:
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> http://git.reviewboard.kde.org/r/106836/
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> (Updated Oct. 13, 2012, 8:06 p.m.)
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> 
> Review request for KDEPIM and KDEPIM-Libraries.
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> Description
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> Leverage QString implicit sharing to reduce memory consumption. In my tests, the memory decreases roughly by ~20MB from a total of 300 down to about 280MB.
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> My question is rather, whether this really needs to be thread safe or not. Maybe also some performance testing is required?
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> Diffs
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>   plugins/akonadi_serializer_mail.h cf43949 
>   plugins/akonadi_serializer_mail.cpp 096073a 
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> Diff: http://git.reviewboard.kde.org/r/106836/diff/
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> Testing
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> Ran KMail, not noticeably slower but uses less ram. Nothing else seems to have changed.
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> Thanks,
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> Milian Wolff
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>

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