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I've been working in Java for more than 20 years now, the last 10 with unperformant, yet performance critical enterprise slop.

I can only really say one thing here: they are really late to the party with this but it's good. The performance boost will be welcome, and would probably change ORMs forever if applied right.

Nullability rules should of course be also part of this domain-constricted types concept, since it would solve a lot of accidental mistakes. Because that's what a type system is for, right? Validation of programmer input.



yeah 100% agree! In some critical area, I'm forced to drop all the "good things" and pack 2 shorts into 1 int to build a tuple(short,short)...




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