Bug 155036

Summary:	Very slow sheet scrolling in Calc on macOS
Product:	LibreOffice	Reporter:	Dan Dascalescu <ddascalescu+freedesktop>
Component:	Calc	Assignee:	Not Assigned <libreoffice-bugs>
Status:	NEW ---
Severity:	normal	CC:	buzea.bogdan, lo, telesto
Priority:	medium	Keywords:	perf
Version:	7.5.2.2 release
Hardware:	x86-64 (AMD64)
OS:	macOS (All)
See Also:	https://bugs.documentfoundation.org/show_bug.cgi?id=152406 https://bugs.documentfoundation.org/show_bug.cgi?id=153985 https://bugs.documentfoundation.org/show_bug.cgi?id=155286 https://bugs.documentfoundation.org/show_bug.cgi?id=155266
Whiteboard:
Crash report or crash signature:		Regression By:
Bug Depends on:
Bug Blocks:	113023

Description Dan Dascalescu 2023-04-26 19:39:46 UTC

I use the same 10,000-row file on two machines, a Linux box with mediocre specs, and a powerful MacBook Pro M1 Max with 32GB RAM. On the Mac, scrolling is much, much slower than on the Linux laptop.

A test case is in this related bug,
https://bugs.documentfoundation.org/attachment.cgi?id=185775&action=edit

Version: 7.5.2.2 (X86_64) / LibreOffice Community
Build ID: 53bb9681a964705cf672590721dbc85eb4d0c3a2
CPU threads: 10; OS: Mac OS X 13.3.1; UI render: default; VCL: osx
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded

Comment 1 Telesto 2023-04-26 20:50:05 UTC

It's not really fast at zoom-level 65%. It's faster at zoom 160%. I have no linux comparison..

but there is lag between releasing fn + arrow up and the scrolling on screen.

Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 066b23115c2a360507e306a88da572554daefab7
CPU threads: 8; OS: Mac OS X 12.6.3; UI render: Skia/Raster; VCL: osx
Locale: nl-NL (nl_NL.UTF-8); UI: en-US
Calc: threaded

Comment 2 ady 2023-04-27 04:57:36 UTC

(In reply to Dan Dascalescu from comment #0)

> A test case is in this related bug,
bug 153985

Comment 3 Dan Dascalescu 2023-11-07 23:27:34 UTC

Scrolling is also painfully slow if running LibreOffice as root, see https://bugs.documentfoundation.org/show_bug.cgi?id=153985#c15

Comment 4 Telesto 2024-06-29 07:59:11 UTC

No issue with
Version: 25.2.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 9c1a48f844eaefc505a5914338b6f444011bf315
CPU threads: 8; OS: macOS 14.3; UI render: Skia/Raster; VCL: osx
Locale: nl-NL (nl_NL.UTF-8); UI: en-US
Calc: threaded