<html> <head> <base href="https://bugzilla.gnome.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - GTK+ uses a lot more CPU under Wayland than under X11" href="https://bugzilla.gnome.org/show_bug.cgi?id=772075#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - GTK+ uses a lot more CPU under Wayland than under X11" href="https://bugzilla.gnome.org/show_bug.cgi?id=772075">bug 772075</a> from <a href="page.cgi?id=describeuser.html&login=gns%40gnome.org" title="Gustavo Noronha (kov) <gns@gnome.org>"> Gustavo Noronha (kov)</a> <pre>Created <a href="attachment.cgi?id=338532&action=diff" name="attach_338532" title="css shadows: repeat a painted surface rather than masking">attachment 338532</a> <a href="attachment.cgi?id=338532&action=edit" title="css shadows: repeat a painted surface rather than masking">[details]</a> <a href='review?bug=772075&attachment=338532'>[review]</a> css shadows: repeat a painted surface rather than masking After further investigating, it seems like doing a repeat masking is much slower than a repeat paint operation. Using an intermediate surface and repeating it improves performance a lot - I can now resize terminal and browser windows without hiccups, and the pixbufs demo runs much better. I still see a lot of overhead caused by the mixing of GL and 2D cairo in some test cases (such as <a href="https://webkit.org/blog-files/3d-transforms/poster-circle.html">https://webkit.org/blog-files/3d-transforms/poster-circle.html</a>), but the overhead caused by painting shadows pretty much disappears from my profiles (I'm testing mainly with gtk 3.20 on Fedora 24, but tried the patch on master as well).</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> </ul> </body> </html>