Does Mesa commit f7a355556ef5fe23056299a77414f9ad8b5e5a1d help?
(It works around DRI3 sync slowdown, but there are also other slowdown bugs for DRI3 here in FDO bugtracker, just search for "DRI3".)
Does Epiphany/WebKitGTK+ uses GL for something else besides WebGL, or do these problematic pages use WebGL? Or how Mesa is involved in this (DRI3 is mainly X server side thing)?
Does Mesa commit f7a355556ef5fe2 3056299a77414f9 ad8b5e5a1d help?
(It works around DRI3 sync slowdown, but there are also other slowdown bugs for DRI3 here in FDO bugtracker, just search for "DRI3".)
Does Epiphany/WebKitGTK+ uses GL for something else besides WebGL, or do these problematic pages use WebGL? Or how Mesa is involved in this (DRI3 is mainly X server side thing)?