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Slow UI performance on linux #3328

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#3533
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Slow UI performance on linux#3328
#3533
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bugSomething isn't working

Description

@smltr
smltr
opened on Jul 28, 2026

Describe the bug
The UI is very sluggish on linux. Things such as the automatic highlighting style change after hovering a message can take a half second.

Steps to reproduce

  1. Open the app
  2. Get an agent to start working on something
  3. Scroll
  4. Notice it takes significant time before scrolling happens
    Expected behavior
    What did you expect to happen?

Version and platform
Find your version at the bottom of the Settings sidebar. Write "unknown" if you can't determine it.

  • Buzz version: v0.4.26
  • OS: Linux Mint

Logs / additional context
Seems to be affected by whether or not an agent is running (worse when agent running)

Activity

  1. smltr
    added
    bugSomething isn't working
    on Jul 28, 2026
  2. JoeJoeflyn
    added 2 commits that reference this issue on Jul 29, 2026

    fix(desktop): disable backdrop-blur on Linux for perf (block#3328)

    cc1c867

    fix(desktop): disable backdrop-blur on Linux for perf (block#3328)

    ab6b668

  3. jordancannon88 commented on Aug 1, 2026

    @jordancannon88
    jordancannon88
    on Aug 1, 2026

    Reproduced on Fedora 42 (GNOME Wayland), v0.5.3 AppImage. Sluggish scrolling and delayed hover highlights.

    Tested:

    1. WEBKIT_DISABLE_DMABUF_RENDERER=1 and GDK_BACKEND=x11: marginal. Expected, since 0.5.3 already applies the dmabuf workaround when running as an AppImage (webkit_rendering.rs).
    2. Disabling agent typing indicator broadcasts on the relay side: minimal improvement while agents work.
    3. Rebuilding the same tag as an rpm in a Fedora 42 container, linked against the system WebKitGTK (Skia renderer): this fixed the issue for me. Scrolling is smooth. The WebKit bundled into the AppImage is the callout. A newer bundled WebKit, or official rpm or flatpak packages, should resolve this issue.

    Only issue with the rpm build is the scrolling is slightly slower inside a thread view.

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