deduplicating lambda methods

[John Rose]

On Mar 2, 2018, at 6:14 PM, Brian Goetz <brian.goetz at oracle.com> wrote:
> 
> This seems more like a candidate for a jlink-time optimization.

Yes, good, although the very first time it is used in any large body like java.base it will discover the same basic top five. Those might as well be done unconditionally.  In which case the first batch can be done without de ending on jlink. 

Anyway, these are further steps. What Liam is starting with is great.