[NETBEANS-6039] Scrolling is choppy and laggy on Apple Mac Book Air M1 (at certain font size)

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 12.1, 12.2, 12.3, 12.4
• Labels: applesilicon scrolling

Environment

roduct Version: Apache NetBeans IDE 12.4

Java: 11.0.11; OpenJDK 64-Bit Server VM 11.0.11+9-LTS

Runtime: OpenJDK Runtime Environment 11.0.11+9-LTS

System: Mac OS X version 11.6 running on aarch64; UTF-8; it_IT (nb)

User directory: /Users/picov/Library/Application Support/NetBeans/12.4

Cache directory: /Users/picov/Library/Caches/NetBeans/12.4

• Assignee: Unassigned
• Reporter: Pier Luigi
• Created: 21/Sep/21 13:54
• Updated: 28/Sep/21 19:29

Description

The scroll of source code is not smooth as it should be on a MacBook Air M1.

The keyboard navigation inside the source code using arrow keys is also laggy.  

Changing version of Java does not affect this behaviour (tested with Azul Zulu OpenJDK builds 1.8 and 11 for ARM 64bit (aarc-64).

Check the "Open in low resolution" option of the executable does not affect this behaviour.

UPDATE:

I've discovered that the problem seems related to font size.

In my case I use "MS Reference Sans Serif" and the laggy scroll occurs if I set the font size equals or greater than 15.

The behaviour seems related to font family: with San Francisco Mono the lag start at size 17 or more, with Robot Mono at 14 or more.

On my Intel Mac the scroll is fast even at higher font size.