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A comment on Why I quit using SwiftUI. Parent comment

Re:Why I quit using SwiftUI by int_19h on Monday August 29, 2022 @01:30AM (#32635062)
I don't think it's very surprising once one considers all the complications of Unicode text layout: combining marks, ligatures, right-to-left etc.
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Re:Why I quit using SwiftUI by stephc_int13 on Monday August 29, 2022 @10:40AM (#32638863)
Well, text layout is not trivial. But computers are incredibly fast when dealing with small amount of data.

I don't see why all of text layout calculations could not be done at maximum speed with everything in L1. Probably with quite a few branch miss-prediction, but still.

The amount of work you can achieve in 1ms on a modern CPU is astonishing.

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Re:Why I quit using SwiftUI by kevingadd on Monday August 29, 2022 @02:57PM (#32642049)
My intuition is that there are probably a bunch of O(NNN) complexity algorithms in typesetting for things like ligatures, and that's where the time goes... but I haven't written a shaping engine.
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Re:Why I quit using SwiftUI by stephc_int13 on Monday August 29, 2022 @08:40PM (#32645373)
Even with O(n^3) algorithms, how many symbols can you put on a display?

And to be fair, more than 90% of those symbols are very likely to be plain old ASCII...

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