node.js vs go on deserlizing/serializing 1k json

benchmark.txt

~/code/http-bench
// go GOMAXPROCS=1 go run webserver.go
// go 1.5
❯ wrk -d10s -t10 -spost_json.lua http://127.0.0.1:8080
Running 10s test @ http://127.0.0.1:8080
  10 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     2.35ms    8.83ms 141.01ms   98.36%
    Req/Sec   737.67    232.61     6.24k    90.63%
  73018 requests in 10.10s, 84.75MB read
Requests/sec:   7227.97
Transfer/sec:      8.39MB

~/code/http-bench 10s
// node webserver.js
// node v4.2.1
❯ wrk -d10s -t10 -spost_json.lua http://127.0.0.1:7070
Running 10s test @ http://127.0.0.1:7070
  10 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     1.36ms  709.16us  21.22ms   87.31%
    Req/Sec   754.88    195.42     2.52k    78.29%
  75464 requests in 10.10s, 90.61MB read
Requests/sec:   7470.72
Transfer/sec:      8.97MB