fmt: benchmark floating point. mallocs per Sprintf("%x"): 1 mallocs per Sprintf("%g"): 4
fmt: benchmark floating point.
mallocs per Sprintf("%x"): 1
mallocs per Sprintf("%g"): 4

R=golang-dev, gri
CC=golang-dev
http://codereview.appspot.com/5449106
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go