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Date:      Mon, 07 Mar 2016 20:26:47 +0000
From:      bugzilla-noreply@freebsd.org
To:        gecko@FreeBSD.org
Subject:   [Bug 203732] www/firefox: High CPU usage when playing HTML5 video when audio/alsa-plugins is built with BUFSZ_P2=off
Message-ID:  <bug-203732-21738-Hrv3nnVdG2@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-203732-21738@https.bugs.freebsd.org/bugzilla/>
References:  <bug-203732-21738@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D203732

--- Comment #14 from Jan Beich <jbeich@FreeBSD.org> ---
(In reply to Arto Pekkanen from comment #12)
> If I disable XRender, then Firefox would use more CPU whilst X.org would =
use less.

XRender can be disabled just for web content but not compositing:
layers.use-image-offscreen-surfaces -> true (hidden pref). However, upstream
disabled for both in Firefox 47.

https://bugzilla.mozilla.org/show_bug.cgi?id=3D1180942#c17
https://bugzilla.mozilla.org/show_bug.cgi?id=3D1241832#c6

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