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kotlinlang

Hi, I want to ask about local functions. Is there any penalty to calling a function which defines a local function inside it? Does it get "redefined" every call or is there something clever in the compiler?

AFAIK on the JVM, local functions are compiled just like lambdas expressions : it is compiled as a class implementing `Function`. If that function captures variables from its closure, then an instance of the class is created at call site ; otherwise the same instance is reused.