noinline

final class noinline extends StaticAnnotation

An annotation for methods that the optimizer should not inline.

Note that by default, the Scala optimizer is disabled and no callsites are inlined. See -opt:help for information how to enable the optimizer and inliner.

When inlining is enabled, the inliner will never inline methods or callsites annotated @noinline.

Examples:

@inline final def f1(x: Int) = x @noinline final def f2(x: Int) = x final def f3(x: Int) = x def t1 = f1(1) // inlined if possible def t2 = f2(1) // not inlined def t3 = f3(1) // may be inlined (the inliner heuristics can select the callsite) def t4 = f1(1): @noinline // not inlined (override at callsite) def t5 = f2(1): @inline // inlined if possible (override at callsite) def t6 = f3(1): @inline // inlined if possible def t7 = f3(1): @noinline // not inlined }

Note: parentheses are required when annotating a callsite within a larger expression.

def t1 = f1(1) + f1(1): @noinline // equivalent to (f1(1) + f1(1)): @noinline def t2 = f1(1) + (f1(1): @noinline) // the second call to f1 is not inlined
class Object
trait Matchable
class Any