User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0 Build ID: 20171026100047 Steps to reproduce: turn on gfx.webrender.enabled turn on gfx.webrender.blob-images turn on layers.acceleration.force-enabled 1. Navigate to https://about.me/mattiamaestrini 2. (Optional) Select "MATTIA MAESTRINI" Actual results: Very high CPU use, fans spin up as soon as page loads. Text selection is extremely slow (selection takes seconds before highlight appears when dragging across text). Expected results: Same behavior as when WebRender is not enabled.
Nightly 58 x64 20171026100047 de_DE @ Debian Testing (KDE, Radeon RX480, AMD FX(tm)-8150 Eight-Core Processor) fresh profile: layers.acceleration.force-enabled, gfx.webrender.enabled (also tested: + gfx.webrender.blob-images) Can't reproduce, everything is fast. ksysguard shows firefox 2% + Web 1% for ca. 1 second. Afterwards, the "CPU %" column is empty again (=too low).
Can confirm this page basically locks up my entire machine on macos. Subsequent visits lock up without doing anything at all.
I cannot reproduce this in my local MacOS machine.
Now works for me. 10:38.82 INFO: Narrowed inbound regression window from [ab416cb2, 4c387a97] (3 builds) to [ab416cb2, d64ad998] (2 builds) (~1 steps left) 10:38.82 INFO: No more inbound revisions, bisection finished. 10:38.82 INFO: First good revision: d64ad9981d9bc5834c38c75128d8258c149772a3 10:38.82 INFO: Last bad revision: ab416cb2c8db72b0c153cebe7eac201d141f1ba4 10:38.82 INFO: Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=ab416cb2c8db72b0c153cebe7eac201d141f1ba4&tochange=d64ad9981d9bc5834c38c75128d8258c149772a3 Likely fixed by Bug 1414271.