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by user_7832 776 days ago
Could you explain what JIT would allow? Would sideloading allow this to "work" or would it need OS support?
1 comments
fl_rn_st 776 days ago
JIT (Just-In-Time) compilation is a technique that allows certain programs to run significantly faster by compiling code at runtime, rather than ahead of time.

Apple enabled this for iOS 14+, but killed it again with iOS 17. It's basically the reason why we currently don't have full speed VM's on iOS / iPadOS devices.

While Sideloading / Altstore / Sidestore allows you to install any IPA, this still doesn't enable JIT for these apps. There are currently some workarounds that involve running certain software on your local network (search SideJITServer on Github).

link
user_7832 775 days ago
Thanks!

> but killed it again with iOS 17

Aah, this explains why UTM (iirc) allowed VMs on iOS 16 on M1 macs but not on 17.

> There are currently some workarounds that involve running certain software on your local network (search SideJITServer on Github).

If I understand right this requires another computer to run some code, right?

link