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andrewk17 | 3 years ago

I've been doing React Native development on my M1 MBP and it's been pretty great overall.

But is anyone else surprised how long it's taking to get the iOS Simulator for ARM? I feel like it would make a massive difference to my developer experience (especially in battery). And I haven't seen any indication that it's coming anytime soon.

discuss

navjack27|3 years ago

Isn't it... Just in xcode? I've used it. It's like, there, right?

I open up my 13.3 beta 2 and go to the xcode tab go down to open developer tool click on simulator and then click on file and then open simulator my mouse over to iOS 15.4 go down to the iPhone 13 for example click on it and then I have a simulated iPhone 13...

And if I check the activity monitor nothing in my activity monitor is showing up as Intel code except for parsec right now...

andrewk17|3 years ago

Great point. I was conflating the Simulator and the app that React Native builds. Simulator is definitely running natively on ARM.

And your comment made me go look back at my react native project setup. Looks like the main reason my app is still building to x86 is because of one Expo dependency that doesn't yet compile to arm64. So more of a Expo concern.

Thanks for checking on your end.

_gllen|3 years ago

I didn't realize it wasn't already ARM. I found one day (https://stackoverflow.com/a/68929949) that running Simulator with Rosetta allows momentum scrolling to work, and everything else seemed perfect, so I left it that way.