Bug 138772 - Libre office calc runs very slow after upgrade
Summary: Libre office calc runs very slow after upgrade
Status: RESOLVED WORKSFORME
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Calc (show other bugs)
Version:
(earliest affected)
6.4.7.2 release
Hardware: All Windows (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-12-09 12:07 UTC by TimStevenson
Modified: 2020-12-09 19:10 UTC (History)
1 user (show)

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Description TimStevenson 2020-12-09 12:07:34 UTC
On recent auto upgrage to 6.4.7.2 (x64) Loading and any use or saving of a spreadsheet is unacceptably slow.
Spreadsheet is ~1.2Mb on disk. 18 columns, ~900 rows, a good few but simple formulae. One graph covering much of the data.
Until the update used to work fine except that it once was similarly slow, but not as bad - cured by a tip found on-line to disable "rendering" (I don't remember details and cannot now find the tip.
Task Manager shows memory usage over 50% but nowhere near 100%. Occurs regardless of other tasks running.
(Open Office calc is also a bit slow now, but useable.)
Comment 1 TimStevenson 2020-12-09 14:36:57 UTC
MORE: Actually I *think* it was anti-aliasing that I turned of last time to restore speed. That did not seem to work this time but disabling "Use open GL for all rendering" in the Options / LibreOffice / View page and re-starting does seem to have recovered the speed of operation.

So on the air again, and I will remember what to do next time, but it would be good if this setting was preserved during an auto-update.

Tim.
Comment 2 Julien Nabet 2020-12-09 19:10:55 UTC
Great you noticed it was OpenGL related! In general, you can use this to do the first checks:
https://wiki.documentfoundation.org/QA/FirstSteps

In future version OpenGL will be removed and be replaced with Skia.
Meanwhile, it may help you check you got last version of your graphic driver + Windows udpate

Since you found the way to make LO full speed again, let's put this one to WFM then.