Using runtime.Gosched() to force schedule Goroutines

A goroutine can run and occupy a thread for a long time. This should be avoided by using runtime.Gosched() to force schedule Goroutines to switch context.

package main

import (
    "fmt"
    "time"
)

func main() {
    go func() {
        for i := 1; i <= 50; i++ {
            fmt.Println("I am Goroutine 1")
        }
    }()

    go func() {
        for i := 1; i <= 50; i++ {
            fmt.Println("I am Goroutine 2")
        }
    }()

    time.Sleep(time.Second)
}

// The result will look like below, 
// one goroutine held the thread for so long.
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 1
// ...

package main

import (
    "fmt"
    "runtime"
    "time"
)

func main() {
    go func() {
        for i := 1; i <= 50; i++ {
            fmt.Println("I am Goroutine 1")
            runtime.Gosched()
        }
    }()

    go func() {
        for i := 1; i <= 50; i++ {
            fmt.Println("I am Goroutine 2")
            runtime.Gosched()
        }
    }()

    time.Sleep(time.Second)
}

// The result will look better like below
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 2
// I am Goroutine 2
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 1
// I am Goroutine 2
// I am Goroutine 2
// ...