Review Request 121453: Cache QTimeZone for the lifespan of the TimeSource don't recreate every minute

[David Edmundson]

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https://git.reviewboard.kde.org/r/121453/
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(Updated Dec. 11, 2014, 9:30 p.m.)


Review request for Plasma.


Repository: plasma-workspace


Description
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cache QTimeZone for the lifespan of the TimeSource don't recreate every minute

QTimeZone::systemTimeZoneId() will open /etc/localtime every single time it is called.

We are calling this in ::updateTime which happens every single minute.


Diffs
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  dataengines/time/timesource.h 5ee1ef6 
  dataengines/time/timesource.cpp 934ed49 

Diff: https://git.reviewboard.kde.org/r/121453/diff/


Testing (updated)
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Ran strace -e open plasmashell without crying

Selected a few zones and mouse-wheeled between them.


Thanks,

David Edmundson

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