A modern programming language that makes developers happier.

kotlinlang

Just noticed that for JVM WHEN statement by string value with constant cases Kotlin produces else-if chains, while Java compiler make optimizations - generating switch by hash code with equals check.
Is there any plans for such optimization in Kotlin backend compiler side?

it should already be implemented, <https://youtrack.jetbrains.com/issue/KT-36846/Generate-TABLESWITCH-LOOKUPSWITCH-in-case-of-matching-hashCodes-in-JVMIR|https://youtrack.jetbrains.com/issue/KT-36846/Generate-TABLESWITCH-LOOKUPSWITCH-in-case-of-matching-hashCodes-in-JVMIR>

might not trigger if the subject is nullable?

I noticed it in 2.0.20-beta. Check on not nullable strings.

May be there is some number of cases after which it optimize. I was checking on 3 cases. Will check on more cases later.