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kotlinlang

hmm, so I'm doing a little bit of performance sensitive compiler-ee things for a DSL, I'm wondering what the extra GC churn of

```
typealias UnaryOp = (Double) -&gt; Double
object cos: UnaryOp by Math::cos
```

is compared to

```
object cos: ((Double) -&gt; Double) {
  override fun invoke(arg: Double) = Math.cos(arg)
}
```

any ideas? is this a compiler optimization or will `UnaryOp by Math::cos` create a closure and have `cos.invoke(arg)` call `$delegateClosure.invoke(arg)`