yggdrasil-go/misc/tests/channelbenchmark.go

package main

import "time"
import "fmt"
import "sync"

func main() {
  fmt.Println("Testing speed of recv+send loop")
  const count = 10000000
  c := make(chan []byte, 1)
  c<-[]byte{}
  var wg sync.WaitGroup
  worker := func () {
    for idx := 0 ; idx < count ; idx++ {
      p := <-c
      select {
        case c<-p:
        default:
      }
    }
    wg.Done()
  }
  nIter := 0
  start := time.Now()
  for idx := 0 ; idx < 1 ; idx++ {
    go worker()
    nIter += count
    wg.Add(1)
  }
  wg.Wait()
  stop := time.Now()
  timed := stop.Sub(start)
  fmt.Printf("%d iterations in %s\n", nIter, timed)
  fmt.Printf("%f iterations per second\n", float64(nIter)/timed.Seconds())
  fmt.Printf("%s per iteration\n", timed/time.Duration(nIter))
}