Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: chromium-browser (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1923431
Title:
Chrome/Chromium is composited slower without "system title bar and
borders"
Status in Mutter:
Unknown
Status in chromium-browser package in Ubuntu:
Confirmed
Status in mutter package in Ubuntu:
Triaged
Bug description:
Chrome/Chromium is composited slower without "system title bar and
borders".
I had a feeling I could see a difference on my 4K monitor and weak
Intel GPU. Enabling "Use system title bar and borders" eliminated
stutters and gave me a smoother experience. So now I've taken some
measurements from gnome-shell (CLUTTER_SHOW_FPS=1) running Chromium,
not stuttering but playing a smoothly rendered video:
---
Xorg
Use system title bar and borders ON:
*** X11 screen frame timings over 1.0s: 59.96 FPS, average: 1.0ms, peak: 2.8ms
*** X11 screen frame timings over 1.0s: 60.03 FPS, average: 0.9ms, peak: 2.4ms
*** X11 screen frame timings over 1.0s: 59.99 FPS, average: 1.0ms, peak: 2.2ms
*** X11 screen frame timings over 1.0s: 59.96 FPS, average: 1.3ms, peak: 2.9ms
*** X11 screen frame timings over 1.0s: 59.99 FPS, average: 1.5ms, peak: 2.9ms
Use system title bar and borders OFF:
*** X11 screen frame timings over 1.0s: 56.92 FPS, average: 3.8ms, peak: 5.7ms
*** X11 screen frame timings over 1.0s: 59.94 FPS, average: 3.9ms, peak: 5.5ms
*** X11 screen frame timings over 1.0s: 60.11 FPS, average: 3.7ms, peak: 4.6ms
*** X11 screen frame timings over 1.0s: 59.98 FPS, average: 3.8ms, peak: 4.8ms
*** X11 screen frame timings over 1.0s: 60.00 FPS, average: 3.9ms, peak: 5.4ms
---
Xwayland
Use system title bar and borders ON:
*** DP-2 frame timings over 1.0s: 60.00 FPS, average: 0.9ms, peak: 1.6ms
*** DP-2 frame timings over 1.0s: 58.95 FPS, average: 1.2ms, peak: 2.0ms
*** DP-2 frame timings over 1.0s: 60.02 FPS, average: 1.0ms, peak: 2.2ms
*** DP-2 frame timings over 1.0s: 60.00 FPS, average: 1.0ms, peak: 1.6ms
*** DP-2 frame timings over 1.0s: 60.05 FPS, average: 1.0ms, peak: 1.7ms
Use system title bar and borders OFF:
*** DP-2 frame timings over 1.0s: 56.99 FPS, average: 1.4ms, peak: 2.9ms
*** DP-2 frame timings over 1.0s: 58.98 FPS, average: 1.7ms, peak: 2.7ms
*** DP-2 frame timings over 1.0s: 60.00 FPS, average: 1.5ms, peak: 2.2ms
*** DP-2 frame timings over 1.0s: 58.04 FPS, average: 1.5ms, peak: 2.6ms
*** DP-2 frame timings over 1.0s: 59.99 FPS, average: 1.3ms, peak: 2.5ms
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