How is pattern matching in Scala implemented at the bytecode level?

Question

How is pattern matching in Scala implemented at the bytecode level?

Is it like a series of if (x instanceof Foo) constructs, or something else? What are

Answer 1

Since version 2.8, Scala has had the @switch annotation. The goal is to ensure, that pattern matching will be compiled into tableswitch or lookupswitch instead of series of conditional if statements.