[Libreoffice-bugs] [Bug 113104] MacOS: CPU utilization while scrolling through a plain text document is around 90%

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=113104

--- Comment #7 from Martin Jungowski <martin.jungowski at schumacher-packaging.com> ---
All these bugs about LibreOffice user interface sluggishness under macOS are
related. LibreOffice performance in macOS is horribly abysmal, and that's the
nicest way I can put this without getting kicked off the internet for good.

The problem seems to lie somewhere in the way LibreOffice draws its user
interface. On high-resolution Retina displays LibreOffice is so slow that you
can't even scroll down an EMPTY (!!!) Writer document or an EMPTY (!!!)
spreadsheet smoothly. No way, no how. Scrolling is so jumpy and laggy. When
moving objects in Draw, such as text boxes, embedded images, forms, etc. the
entire UI seems to choke up and lags behind by more than 1-2 seconds. Resizing
an image in a Draw document is practically impossible as it takes anywhere
between 2-10 seconds for screen contents to update to reflect the new size.

Starting LibreOffice in Low Resolution improves performance noticeably but in
return makes the entire application appear blurry, so that's not a solution
either.

This has been going on for YEARS now. I can't tell how long for sure but
definitely since the early days of LibreOffice somewhere around Version 4.x.
LibreOffice under macOS is unusable on every Mac released after 2012, because
that is when Apple introduced their high-resolution Retina display. It is now
late 2018, we have 6-core MacBook Pros and 18-core iMac Pros and LibreOffice
remains completely unusable under macOS on all of these. In fact, performance
is so bad I have resorted to using Microsoft Office for editing OpenDocument
files because using LibreOffice to edit a simple spreadsheet or text document
feels like getting punched repeatedly in the face. With a sledgehammer. Swung
by Thor. On Speed.

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