Measure NAPI perf for nanomsg perf benchmark

[aruneshchandra]

No description provided.

[boingoing]

Here is a dump of the perf numbers with a summary at the end:

V8	Napi
real 0m10.998s	real 0m11.212s
user 0m1.968s	user 0m1.956s
sys 0m0.588s	sys 0m0.624s
-----------------------	-----------------------
real 0m10.967s	real 0m11.105s
user 0m1.980s	user 0m1.992s
sys 0m0.552s	sys 0m0.580s
-----------------------	-----------------------
real 0m10.886s	real 0m11.172s
user 0m1.940s	user 0m1.948s
sys 0m0.560s	sys 0m0.620s
-----------------------	-----------------------
real 0m11.033s	real 0m11.120s
user 0m1.960s	user 0m1.944s
sys 0m0.596s	sys 0m0.604s
-----------------------	-----------------------
real 0m10.998s	real 0m11.193s
user 0m1.940s	user 0m2.000s
sys 0m0.636s	sys 0m0.552s
-----------------------	-----------------------
real 0m11.098s	real 0m11.000s
user 0m1.972s	user 0m1.960s
sys 0m0.580s	sys 0m0.564s
-----------------------	-----------------------
real 0m10.984s	real 0m11.091s
user 0m1.912s	user 0m1.968s
sys 0m0.608s	sys 0m0.576s
-----------------------	-----------------------
real 0m10.949s	real 0m11.119s
user 0m1.932s	user 0m1.928s
sys 0m0.576s	sys 0m0.608s
-----------------------	-----------------------
real 0m11.051s	real 0m11.137s
user 0m1.944s	user 0m1.936s
sys 0m0.588s	sys 0m0.596s
-----------------------	-----------------------
real 0m10.945s	real 0m11.225s
user 0m1.960s	user 0m1.952s
sys 0m0.600s	sys 0m0.600s
-----------------------	-----------------------
real 0m10.910s	real 0m10.912s
user 0m1.964s	user 0m1.968s
sys 0m0.576s	sys 0m0.588s
-----------------------	-----------------------
real 0m11.371s	real 0m10.954s
user 0m1.912s	user 0m1.924s
sys 0m0.600s	sys 0m0.624s
-----------------------	-----------------------
real 0m11.112s	real 0m11.004s
user 0m1.980s	user 0m1.944s
sys 0m0.556s	sys 0m0.640s
-----------------------	-----------------------
real 0m10.945s	real 0m11.148s
user 0m1.984s	user 0m1.932s
sys 0m0.524s	sys 0m0.648s
-----------------------	-----------------------
real 0m10.975s	real 0m11.018s
user 0m1.996s	user 0m1.956s
sys 0m0.496s	sys 0m0.588s
-----------------------	-----------------------
avg(real) 11.0148	avg(real) 11.094 (+0.7%)

[aruneshchandra]

Closing this issue. Perf measurement after error handling will be covered via issue #57