tiny performance improvement. add couple comments.
tiny performance improvement. add couple comments.

ggonzale/jstat,akrawitz/jstat,NorthDecoder/jstat,smarden1/jstat,akrawitz/jstat,JeebsM/jstat,ggonzale/jstat,jstat/jstat,jstat/jstat,JeebsM/jstat,cmpolis/jstat,jamescgibson/jstat,smarden1/jstat,NorthDecoder/jstat