RFR: 8223078: Add microbenchmark for array copying/clearing/resizing

[Claes Redestad]

I think these benchmarks looks OK. Thanks for doing this!

/Claes

On 2019-04-30 20:15, Martin Buchholz wrote:
> Webrev updated.
> More comments.
> 
> I now use
> 
>      @Param("999")
>      public int size;
> 
> All values of @Param are plausible, so only including one representative 
> one.