Firefox/Content Performance Program/Observations: Difference between revisions

Firefox/Content Performance Program/Observations (view source)

Revision as of 15:07, 22 October 2015

1,419 bytes added , 22 October 2015

Two monitors configurations (between browsers) - added data

Avih

Confirmed users

95

edits

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 ===== Two monitors configurations (between browsers) =====
 * performed by: avih
-TBD
+* Test how well browsers use the correct refresh rate in a two monitors configuration.
+* tested using: http://www.vsynctester.com/index.html
+* Procedure - with a single browser window, check all combinations of the following variables:
+** Browser: Firefox release / nightly / Chrome / IE / Edge (win10 only)
+** OS: Windows 8.1 / Windows 10
+** Windows "main" display: laptop's built-in / external monitor
+** The browser window is at: laptop's built-in / external monitor
+** Laptop's built in display refresh rate: lower/identical/higher than that of the external monitor
+* Observations:
+** When both monitors have the same rate - all browsers behave optimally.
+** Firefox is the best, with only a single suboptimal case (and not worse than other browsers in this case):
+*** When the Windows "main" display has lower rate than the extended-to display (regardless if the main is the built-in/external, or windows 8.1/10), then the animation rate on the extended-to display is the refresh rate of the "main" display (therefore lower than it should be).
+** Chrome comes second:
+*** Same issue as Firefox, plus few other cases where it incorrectly uses the rate of the "other" monitor.
+** IE/Edge are last:
+*** Same issues as Firefox and Chrome, plus when the main display is the laptop, and it has a lower rate than the external display, on both win8/10 -> it uses weird rAF rate (67hz, 64hz) which doesn’t match any monitor.
 ===== Memory usage of e10s, non e10s (Firefox and others) =====