how is kotlin so much faster than java while using the same bytecode?

Why do you think that kotlin is much faster?

I tested them side by side after converting some java code

how did you test it? with JMH?

Is your code doing the same things?

yeah, i literally just used the coverter from java to kotlin, but i'll test it again later. i imagine there should be no reason it does?

Well, in theory, since a lot of stuff is mutable in Java, but immutable in Kotlin, the compiler can do more optimisations. Otherwise ¯\_(ツ)_/¯

okay!

Dynamic languages also have some great advantages, like being able to having a ‘real’ repl. I’ve seen some comparisons between java and kotlin, but the differences weren’t that big, and sometimes kotlin was slower.

@Hullaballoonatic home code testing hardly ever is reliable source of benchmarks.