Using CLUTTER_PAINT=damage-region seems to show the difference/problem is the custom window borders being repainted constantly. That doesn't happen when "Use system title bar and borders" is enabled.
** Description changed: 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 running Chromium, not stuttering but playing a smoothly - rendered video: + 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 --- Wayland 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 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1923431 Title: Chrome/Chromium is composited slower without "system title bar and borders" Status in chromium-browser package in Ubuntu: New 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 --- Wayland 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1923431/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
