ErrGroup-有错误返回的Goroutine控制

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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

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package main

import (
"fmt"
"golang.org/x/sync/errgroup"
"time"
)

func main() {

var (
g = &errgroup.Group{}
a int
b int
c int
)

timeNow := time.Now()

g.Go(func() error {
a = f1()
return nil
})

g.Go(func() error {
b = f2()
return nil
})

g.Go(func() error {
c = f3()
return nil
})

g.Wait()

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: 1.003517107s

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