Beat up your CPU for 10 seconds

main.go

package main

import (
    "runtime"
    "time"
)

func main() {
    n := runtime.NumCPU()
    runtime.GOMAXPROCS(n)

    quit := make(chan bool)

    for i := 0; i < n; i++ {
        go func() {
            for {
                select {
                case <-quit:
                    return
                default:
                }
            }
        }()
    }

    time.Sleep(10 * time.Second)
    for i := 0; i < n; i++ {
        quit <- true
    }
}