Bug 124968 - UI Performance Sllooowwww on 27" Retina iMac 2019 Model
Summary: UI Performance Sllooowwww on 27" Retina iMac 2019 Model
Status: RESOLVED DUPLICATE of bug 113104
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: UI (show other bugs)
(earliest affected) release
Hardware: All Mac OS X (All)
: medium normal
Assignee: Not Assigned
Depends on:
Blocks: HiDPI Scrolling-PageUpDown
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Reported: 2019-04-26 00:55 UTC by Damien
Modified: 2019-04-29 07:07 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:


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Description Damien 2019-04-26 00:55:35 UTC
Using either Text Doc, Spreadsheet or Presentation, normal operation is very slow to the point of being unusable. Simply scrolling the window on a new document in any app is very laggy. I checked the CPU usage, and it spikes to 50% very quickly. Was trying to create a slide presentation of 20 slides and some small images (appts 8Mb in total) and the CPU was sitting around 100%. It seems to be a core UI issue across all Apps I have used.

I have just bought a new 2019 27" iMac, 32GB, 2TB SSD. Clean install with Mojave. Clean install of LibreOffice Am running it side by side with my old 27in iMac, which does not show the problem. Seems to be a Retina issue?

Note: I can't select checkbox "Use Hardware Acceleration" it is greyed out and unchecked.

Steps to Reproduce:

1.Open any doc, eg a spreadsheet
2.Fill in a column worth of numbers, anything really.
3.Scroll up and down or left and right, very laggy.
4.Also watch CPU usage while doing this. 

Actual Results:
UI responsiveness is very slow.

Expected Results:
UI responsiveness not be very slow.

Reproducible: Always

User Profile Reset: Yes

OpenGL enabled: Yes

Additional Info:
Comment 1 Alex Thurgood 2019-04-29 07:07:04 UTC

*** This bug has been marked as a duplicate of bug 113104 ***