[Webkit-unassigned] [Bug 173434] Support for 120Hz requestAnimationFrame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=173434

--- Comment #50 from mdrejhon <mark at blurbusters.com> ---
(In reply to Jeffrey Blanz from comment #46)
> It appears all Apple devices, including with external monitors on macs,
> support native animations except for iPhone Pros.

I have recently gotten mixed reports on native animations support for >120Hz, I have bought way more equipment and proudly own a MacBook for 10-hour Visual Studio Code sessions that needs 120Hz and HDR testing, so MacBook is my TestUFO development machine now!  TestUFO HDR launch is delayed until browsers become a bit less buggy in this area;

It's been a while, but if you connect a 144Hz monitor to a Mac, Safari stubbornly still does 120fps and scrolling stutters badly.  I need to do more tests, but there are possibly two reasons:

(1) The internal display (e.g. MacBook display is still at 120Hz).   
The animations may go native if you disconnect the display.  

(2) Or Apple may have fixed 144Hz+ support in some situations.

But with latest MacOS AND if you turn off the internal display, external displays now seem to go native - no more 120Hz interference from a concurrently-running 120Hz ProMotion display. 

Still wish my MacBook was OLED, as it's one of the blurriest 120Hz displays I've ever used -- Apple priorities good HDR and color, but definitely not 120Hz motion performance.  It's only 1.1x better than 60Hz in scrolling clarity.  Part of this is because LCD overdrive is disabled on almost all laptops, including Apple, and excellent-color LCDs are usually slower too.  But OLED lets you have cake and eat it too, and so I am absurdly excited about OLEDs speeding up the refresh rate race due to more everyday consumer benefit.  

TechSpot mainstream writer recently wrote (in their March 22, 2024 lack of OLED burnin update) "...The 240Hz refresh rate at 4K is much better than I was expecting for productivity work. Relative to the 144Hz LCD I was using, the combination of a higher refresh rate and faster response times makes this QD-OLED much nicer to use for everyday tasks. Especially when browsing the web and scrolling through text, the speed and refresh rate combination is noticeable and provides a smoother, clearer experience – so it's not just gaming where you'll benefit from a 240Hz refresh rate..."

(So, OLEDs makes the human-benefits of extra Hz much more visible -- 240Hz is no longer just for esports)

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