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Go vs Node Web Service 1:1

Node6:
#[Mean    =    18267.195, StdDeviation   =     5206.857]
#[Max     =    27852.800, Total count    =       147705]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  222902 requests in 30.01s, 90.77MB read
  Socket errors: connect 0, read 0, write 0, timeout 244
Requests/sec:   7427.31
Transfer/sec:      3.02MB

Go 1.7:
#[Mean    =     2223.636, StdDeviation   =     2454.035]
#[Max     =    18792.448, Total count    =      1363554]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2152716 requests in 30.21s, 751.39MB read
  Socket errors: connect 0, read 0, write 0, timeout 65
Requests/sec:  71254.87
Transfer/sec:     24.87MB

24.87MB / 3.02MB = 8.23x

Go1.7 with hmac pool

#[Mean    =     1932.162, StdDeviation   =     2130.488]
#[Max     =    20496.384, Total count    =      1520471]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2293099 requests in 30.00s, 800.39MB read
Requests/sec:  76425.36
Transfer/sec:     26.68MB

#[Mean    =     3476.985, StdDeviation   =     3550.723]
#[Max     =    24100.864, Total count    =      1476363]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2196941 requests in 29.99s, 766.83MB read
Requests/sec:  73246.96
Transfer/sec:     25.57MB

#[Mean    =     2149.328, StdDeviation   =     2216.679]
#[Max     =    17580.032, Total count    =      1624747]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2430365 requests in 29.99s, 848.31MB read
  Socket errors: connect 0, read 0, write 0, timeout 52
Requests/sec:  81026.92
Transfer/sec:     28.28MB

Go1.7 without pool @ vdr

#[Mean    =     3767.579, StdDeviation   =     3354.624]
#[Max     =    24772.608, Total count    =      1489250]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2181695 requests in 29.99s, 761.51MB read
Requests/sec:  72736.80
Transfer/sec:     25.39MB
====
#[Mean    =     3845.379, StdDeviation   =     3210.762]
#[Max     =    22282.240, Total count    =      1343812]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  2067453 requests in 29.99s, 721.63MB read
Requests/sec:  68927.90
Transfer/sec:     24.06MB

Node6 at vdr

#[Mean    =    18253.479, StdDeviation   =     5200.446]
#[Max     =    28000.256, Total count    =       139499]
#[Buckets =           27, SubBuckets     =         2048]
----------------------------------------------------------
  211591 requests in 29.99s, 86.16MB read
  Socket errors: connect 0, read 0, write 0, timeout 232
Requests/sec:   7054.51
Transfer/sec:      2.87MB