Apache Benchmark

ab

ab -n 32 -c 32 "http://127.0.0.1:8080/"
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking 127.0.0.1 (be patient).....done


Server Software:
Server Hostname:        127.0.0.1
Server Port:            8080

Document Path:          /
Document Length:        11 bytes

Concurrency Level:      32
Time taken for tests:   1.012 seconds
Complete requests:      32
Failed requests:        0
Total transferred:      4096 bytes
HTML transferred:       352 bytes
Requests per second:    31.62 [#/sec] (mean)
Time per request:       1012.074 [ms] (mean)
Time per request:       31.627 [ms] (mean, across all concurrent requests)
Transfer rate:          3.95 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    1   0.5      1       2
Processing:  1008 1009   0.3   1009    1009
Waiting:     1006 1008   0.4   1008    1009
Total:       1009 1010   0.7   1010    1011

Percentage of the requests served within a certain time (ms)
  50%   1010
  66%   1011
  75%   1011
  80%   1011
  90%   1011
  95%   1011
  98%   1011
  99%   1011
 100%   1011 (longest request)

main.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"time"
)

func main() {
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		time.Sleep(1 * time.Second)
		fmt.Fprint(w, "Hello World")
	})
	log.Fatal(http.ListenAndServe(":8080", nil))
}