Eli Zaretskii <e...@gnu.org> writes: > Po Lu, any other ideas or suggestions? > >> FYI there are other reports online of people noticing major latency in HiDPI >> mode with the PGTK version, especially when the frame is fullscreen (so >> there's more pixels to update): >> >> https://old.reddit.com/r/emacs/comments/ucv0at/awful_performance_with_pgtk_on_wayland/ >> >> https://old.reddit.com/r/emacs/comments/1acdieh/pgtk_emacs_high_input_lag_at_large_frame_sizes_on/ > > I don't doubt what you report is real.
I proposed a theory in a number of other tickets concerning this lag, specifically that the GTK 3 toolkit cannot take advantage of hardware accelerated graphics on Wayland, which produces perceptible delays on large displays.
