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24 lines
464 B
Go
24 lines
464 B
Go
package main
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import (
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"flag"
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"fmt"
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)
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var ngoroutine = flag.Int("n", 100000, "how many goroutines")
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func f(left, right chan int) { left <- 1 + <-right }
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func main() {
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flag.Parse()
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leftmost := make(chan int)
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var left, right chan int = nil, leftmost
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for i := 0; i < *ngoroutine; i++ {
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left, right = right, make(chan int)
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go f(left, right)
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}
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right <- 0 // bang!
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x := <-leftmost // wait for completion
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fmt.Println(x) // 100000, ongeveer 1,5 s
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}
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