ErrGroup-有错误返回的Goroutine控制

sync
留言 
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package main

import (
	"fmt"
	"time"
)

func main() {

	timeNow := time.Now()

	a := f1()

	b := f2()

	c := f3()

	fmt.Println("和为:", a+b+c)

	fmt.Println("耗时:", time.Since(timeNow))

}

func f1() int {

	time.Sleep(1e9)

	return 1
}

func f2() int {

	time.Sleep(1e9)

	return 2
}

func f3() int {

	time.Sleep(1e9)

	return 3
}

运行结果为:

1
2
和为: 6
耗时: 3.00640904s