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Use unbuffered chan in parallel func for processesing the data #162

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Use unbuffered chan in parallel func for processesing the data #162

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17 changes: 12 additions & 5 deletions utils.go
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,16 @@ func parallel(start, stop int, fn func(<-chan int)) {
procs = count
}

c := make(chan int, count)
for i := start; i < stop; i++ {
c <- i
}
close(c)
c := make(chan int)
done := make(chan struct{})

go func(c chan<- int) {
defer close(done)
for i := start; i < stop; i++ {
c <- i
}
close(c)
}(c)

var wg sync.WaitGroup
for i := 0; i < procs; i++ {
Expand All @@ -46,6 +51,8 @@ func parallel(start, stop int, fn func(<-chan int)) {
fn(c)
}()
}

<-done
wg.Wait()
}

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