Resizing window lags when history buffer has lots of lines #20473

New Issue

claunia · 2026-01-31T07:14:49Z

claunia commented

2026-01-31 07:14:49 +00:00

Originally created by @mailinglists35 on GitHub (Sep 13, 2023).

Windows Terminal version

1.18.1462.0

Windows build number

10.0.22621.1848

Other Software

No response

Steps to reproduce

Settings - Defaults - Advanced - History size - 999999
Open powershell tab
issue ls -r or similar to fill the history buffer (not necessarily fill up, just ensure there are plenty of lines)
Click and drag the lower edge of the window to resize it

Expected Behavior

smooth movement

Actual Behavior

laggy movement like I have a 486 computer

Originally created by @mailinglists35 on GitHub (Sep 13, 2023). ### Windows Terminal version 1.18.1462.0 ### Windows build number 10.0.22621.1848 ### Other Software _No response_ ### Steps to reproduce Settings - Defaults - Advanced - History size - 999999 Open powershell tab issue `ls -r` or similar to fill the history buffer (not necessarily fill up, just ensure there are plenty of lines) Click and drag the lower edge of the window to resize it ### Expected Behavior smooth movement ### Actual Behavior laggy movement like I have a 486 computer

claunia added the Area-Output Issue-Bug Priority-3 In-PR Needs-Tag-Fix Product-Terminal labels 2026-01-31 07:14:49 +00:00

claunia closed this issue

2026-01-31 07:14:50 +00:00

claunia commented

2026-01-31 07:14:51 +00:00

@lhecker commented on GitHub (Sep 13, 2023):

Good news! I already opened a PR to fix it: #15701

@lhecker commented on GitHub (Sep 13, 2023): Good news! I already opened a PR to fix it: #15701

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dev/duhowett/wprp

dev/miniksa/bitmap-mad-with-power

dev/migrie/f/resize-quirk

dev/migrie/f/reflow-buffer-on-resize-002

wpf-renderer-revert

dev/miniksa/draw

release-0.9

dev/miniksa/tabs-color-fix

dev/miniksa/4309

dev/migrie/f/just-wrapping

dev/migrie/b/3490-try-another-resize-algo

release-0.8

dev/migrie/b/3490-a-simpler-resize

dev/migrie/b/3490-resize-down

dev/miniksa/4254

dev/migrie/f/conpty-wrapped-lines-2

dev/migrie/b/be-better-at-hiding

dev/migrie/f/3327-xaml-theming-proto

dev/miniksa/gardening2

release-0.7

dev/duhowett/conpty-flags

dev/migrie/f/603-vintage-opacity

dev/migrie/PR#3181-comments

dev/duhowett/font-64

release-0.5

dev/migrie/b/663-paste-lf-always

dev/migrie/b/2011-reordered-fallthrough-strings

dev/migrie/b/411-init-tab-stops

dev/migrie/b/json-patching-is-hard

dev/migrie/b/2455-try-getting-tests-working

dev/migrie/b/1223-change-256-table

dev/migrie/f/2171-openterm.cmd

dev/migrie/f/drag-panes

dev/migrie/f/2046-command-palette

release-0.3

dev/miniksa/manager

dev/migrie/f/non-terminal-panes

dev/migrie/f/passthrough-2019

dev/miniksa/shared_pch

dev/migrie/f/1897-less-duplicated-work

release-0.2

dev/cazamor/mcs/viewport-selection

dev/duhowett/version_hack

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Reference: starred/terminal#20473