[vim/vim] #18002 wayland gtk redraw slow on `:version` and `:highlight` (PR #19062)

dezza

unread,

Jan 2, 2026, 7:44:28 AMJan 2

to vim/vim, Subscribed

Since patch 9.1.1585: Wayland: gvim still needs GVIM_ENABLE_WAYLAND,
the message window has been slow at drawing especially :version and
:highlight.

Since wayland redraws entire screen between updates (contrary to X11),
there are most likely- many more gains in perf in other paths not
discovered.

The issue is easily reproduced on;
Fullscreen, fractionally scaled, HiDPI displays (4K)

You can view, comment on, or merge this pull request online at:

https://github.com/vim/vim/pull/19062

Commit Summary

5f788cb refactor: gui.is_wayland for checking display
907f675 perf: gtk-wayland slow redraw

File Changes

(4 files)

Patch Links:

—
Reply to this email directly, view it on GitHub.
You are receiving this because you are subscribed to this thread.

dezza

unread,

Jan 2, 2026, 7:55:12 AMJan 2

to vim/vim, Push

@dezza pushed 1 commit.

bddabb3 fix: ifdef

—
View it on GitHub or unsubscribe.
You are receiving this because you are subscribed to this thread.

Christian Brabandt

unread,

Jan 2, 2026, 8:16:05 AMJan 2

to vim/vim, Subscribed

@chrisbra commented on this pull request.

In src/gui.c:

> @@ -9,6 +9,9 @@
  */
 
 #include "vim.h"
+#if defined(FEAT_GUI_X11) && GTK_CHECK_VERSION(3,0,0)

I think this should be:
#if defined(FEAT_GUI_X11) && defined(GDK_WINDOWING_WAYLAND) && GTK_CHECK_VERSION(3,0,0)

according to https://docs.gtk.org/gdk4/wayland.html

—
Reply to this email directly, view it on GitHub, or unsubscribe.
You are receiving this because you are subscribed to this thread.

dezza

unread,

Jan 2, 2026, 8:31:35 AMJan 2

to vim/vim, Subscribed

@dezza commented on this pull request.

In src/gui.c:

> @@ -9,6 +9,9 @@
  */
 
 #include "vim.h"
+#if defined(FEAT_GUI_X11) && GTK_CHECK_VERSION(3,0,0)

You linked the gdk4 docs, I will look into it, thanks.

Made PR into a draft, see the tests failing and now it seems its back to slow for me since editing it.

Will continue trying- I was sure I had it.

—
Reply to this email directly, view it on GitHub, or unsubscribe.
You are receiving this because you are subscribed to this thread.

dezza

unread,

Jan 7, 2026, 10:42:21 PMJan 7

to vim/vim, Push

@dezza pushed 2 commits.

4d641f7 refactor: gui.is_wayland for checking display
ba6fef5 perf(wayland): skip compositing, use direct blit

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

Jan 8, 2026, 5:34:22 AMJan 8

to vim/vim, Push

@dezza pushed 1 commit.

977270e lint: vim codestyle brace after paren

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

Jan 8, 2026, 3:13:15 PMJan 8

to vim/vim, Push

@dezza pushed 1 commit.

2e822fd fix: scroll-up was buggy and repeated same lines down- need clip, save, restore

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

3:35 AM (8 hours ago) 3:35 AM

to vim/vim, Push

@dezza pushed 4 commits.

cab909c refactor: gui.is_wayland for checking display
719dd78 perf(gtk-wayland): avoid early redraws; compositor does redraw
ec87708 perf(gtk-wayland): avoid reallocs, optimize scroll copy
3434019 perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

4:18 AM (7 hours ago) 4:18 AM

to vim/vim, Push

@dezza pushed 2 commits.

3673452 perf(gtk-wayland): avoid reallocs, optimize scroll copy
3ed531a perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

4:21 AM (7 hours ago) 4:21 AM

to vim/vim, Push

@dezza pushed 2 commits.

21f245a perf(gtk-wayland): avoid reallocs, optimize scroll copy
5a41d82 perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

4:36 AM (7 hours ago) 4:36 AM

to vim/vim, Push

@dezza pushed 2 commits.

d71f5a2 perf(gtk-wayland): avoid reallocs, optimize scroll copy
a691f41 perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

4:52 AM (7 hours ago) 4:52 AM

to vim/vim, Push

@dezza pushed 4 commits.

8baecba refactor: gui.is_wayland for checking display
4e7f06e perf(gtk-wayland): avoid early redraws; compositor does redraw
c0e0710 perf(gtk-wayland): avoid reallocs, optimize scroll copy
8f9a305 perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

6:09 AM (6 hours ago) 6:09 AM

to vim/vim, Push

@dezza pushed 4 commits.

7821040 refactor: gui.is_wayland for checking display
2ee8f2c perf(gtk-wayland): avoid early redraws; compositor does redraw
0c3cab4 perf(gtk-wayland): avoid reallocs, optimize scroll copy
c69b160 perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

7:08 AM (5 hours ago) 7:08 AM

to vim/vim, Push

@dezza pushed 4 commits.

68528ad refactor: gui.is_wayland for checking display
b542ec0 perf(gtk-wayland): avoid early redraws; compositor does redraw
9c2ddbf perf(gtk-wayland): avoid reallocs, optimize scroll copy
55e824c perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

dezza

unread,

7:21 AM (4 hours ago) 7:21 AM

to vim/vim, Push

@dezza pushed 2 commits.

c97633d perf(gtk-wayland): avoid reallocs, optimize scroll copy
80db39b perf(gtk-wayland): don't block input loop

—
View it on GitHub or unsubscribe.

You are receiving this because you are subscribed to this thread.

Reply all

Reply to author

Forward