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0 pointsWowfunhappy2y ago0 comments

> I wonder why anyone would turn ProMotion off considering that 120Hz massively improves responsiveness.

The first reason that comes to mind is battery life. That's probably the most broadly applicable use case.

But also, if I was still doing e.g. frontend web development, I would want to confirm that my css animations looked nice at 60 hz.

Edit: My first use case is likely wrong, thank you to replies for reminding me Apple uses adaptive refresh down to 1 hz.

0 comments

jwells892y ago

macOS is very good at adaptively reducing refresh rate when nothing is happening on screen, with the panel reportedly supporting the full range of 1-120hz so barring badly engineered apps that are permanently pinned at max refresh, the battery impact of keeping ProMotion on is minimal for most use cases.

londons_explore2y ago

Which raises the question even more why the refresh rate matters during early bootup - surely you could just start with an apple logo and a 1 Hz refresh rate, and then up the rate later during boot when it's time to do some animation...

lxgr2y ago

Changing the refresh rate makes the screen go blank for a second or so.

GP of this thread links to a post arguing that Apple is going out of their way to avoid just that during the boot sequence.

1 more reply

WowfunhappyOP2y ago

Oops, thank you, I completely forgot they were doing the adaptive refresh thing!

vvillena2y ago

Isn't battery life a reason to keep it on? The refresh rate will be down to 24hz most of the time.

beebeepka2y ago

Why would 60 FPS CSS animations look bad on high refresh displays?

WowfunhappyOP2y ago

Well the CSS transition wouldn't run at 60 fps, it would run at 120 fps, no?

An animation that looks slick at 120 fps might look too fast/slow/complex/whatever on a common 60 hz screen. So if I was still doing this sort of development, I'd prefer to be working on a 60 hz monitor.

beebeepka2y ago

Aren't CSS animations capped at 60, same as requestAnimationFrame?

I've been advocating (and using) high refresh displays for over two decades and I find your reasoning preposterous. Downgrading to crappy 60 Hz monitor for nothing.

3 more replies

c-hendricks2y ago

I'm not even sure CSS animations can go above 60fps, and am unsure why you'd think it would be faster / slower on a different refresh rate screen: CSS transitions are defined by time, not frames.

1 more reply

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0 pointsWowfunhappy2y ago0 comments

> I wonder why anyone would turn ProMotion off considering that 120Hz massively improves responsiveness.

The first reason that comes to mind is battery life. That's probably the most broadly applicable use case.

But also, if I was still doing e.g. frontend web development, I would want to confirm that my css animations looked nice at 60 hz.

Edit: My first use case is likely wrong, thank you to replies for reminding me Apple uses adaptive refresh down to 1 hz.

0 comments

jwells892y ago

londons_explore2y ago

lxgr2y ago

Changing the refresh rate makes the screen go blank for a second or so.

GP of this thread links to a post arguing that Apple is going out of their way to avoid just that during the boot sequence.

1 more reply

WowfunhappyOP2y ago

Oops, thank you, I completely forgot they were doing the adaptive refresh thing!

vvillena2y ago

Isn't battery life a reason to keep it on? The refresh rate will be down to 24hz most of the time.

beebeepka2y ago

Why would 60 FPS CSS animations look bad on high refresh displays?

WowfunhappyOP2y ago

Well the CSS transition wouldn't run at 60 fps, it would run at 120 fps, no?

beebeepka2y ago

Aren't CSS animations capped at 60, same as requestAnimationFrame?

I've been advocating (and using) high refresh displays for over two decades and I find your reasoning preposterous. Downgrading to crappy 60 Hz monitor for nothing.

3 more replies

c-hendricks2y ago

I'm not even sure CSS animations can go above 60fps, and am unsure why you'd think it would be faster / slower on a different refresh rate screen: CSS transitions are defined by time, not frames.

1 more reply

j / k navigate · click thread line to collapse