Bug 515910 - Noticable lag (possibly caused by full-window updates)
Summary: Noticable lag (possibly caused by full-window updates)
Status: REPORTED
Alias: None
Product: konsole
Classification: Applications
Component: general (other bugs)
Version First Reported In: master
Platform: Other Linux
: NOR minor
Target Milestone: ---
Assignee: Konsole Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-12 15:45 UTC by Christoph Feck
Modified: 2026-02-12 15:45 UTC (History)
0 users

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Description Christoph Feck 2026-02-12 15:45:17 UTC 
Since updating Konsole, I experience a very noticable lag.

Steps to reproduce:
- resize terminal as large as possible (here: 346x99 characters)
- set high keyboard repeat rate (here: 60 per second)
- hold down any character key

Expected result:
- the characters appear and cursor moves on each repeat

Actual result:
- the characters appear delayed and cursor jumps with a noticable lag (~15 fps?)


This is a regression when I updated from bac719d to b7b2037.

If I understand commit b84fdda correctly, it causes a full viewport update on each cursor movement.

https://invent.kde.org/utilities/konsole/-/commit/b84fdda99382dde0eadc3a7a5cae32cfc6b4cba5#44da6138f6731f1622f59c0b0b6c2dd697e2160e_47_69