for example, when you call `listOf(1, 2, 3).map { ...

# getting-started

[Leon K]

for example, when you call listOf(1, 2, 3).map { it * 2 }, the compiler takes your { it * 2} lambda and the things that map does with it (most likely call it inside a for loop or something) and replaces your .map call with the implementation of map. This makes .map have no additional overhead over a for-loop