fast way to infer caller

[Kasper Nielsen]

>
> nope, see my previous mail to Ceki, the VM is cheating here if it can
> inline the call to MethodHandles.lookup()
>

Does how the VM cheats really matter? The fact is that the code in the JDK
can
get the calling class and implement something like MethodHandles.lookup() so
it takes ~3 ns. If you implemented something like a lookup class as a normal
user your best bet would be StackWalker.GetCallingClass() and you would end
up with something that is at least 2 magnitudes slower. That is probably not
an issue for most use cases. But for some, it might be a bit of a steep
cost.

/Kasper