gothreads.go

package main

import (
    )

func main() {
    for i := 0; i<1000000; i++ {
        c := create_empty_goroutine()
        <-c
    }
}

func create_empty_goroutine() chan int {
    c := make(chan int)
    go func() { c <- 1 }()
    return c
}

[samuel gotest]$ for i in $(seq 1 1 4); do export GOMAXPROCS=$i; echo "Starting $i threads..."; time ./goroutinetest; done;
Starting 1 threads...

real    0m0.874s
user    0m0.852s
sys 0m0.052s
Starting 2 threads...

real    0m4.100s
user    0m4.992s
sys 0m2.300s
Starting 3 threads...

real    0m4.086s
user    0m5.196s
sys 0m2.536s
Starting 4 threads...

real    0m3.690s
user    0m4.824s
sys 0m2.064s