Concurrency in Go Chapter1 (7)

package mainimport (
"fmt"
"sync"
"time"
)
func main() {
var wg sync.WaitGroup
var sharedLock sync.Mutex
const runtime = 1 * time.Second
greedyWorker := func() {
defer wg.Done()
var count int
for begin := time.Now(); time.Since(begin) <= runtime; {
sharedLock.Lock()
time.Sleep(3 * time.Nanosecond)
sharedLock.Unlock()
count++
}
fmt.Printf("Greedy worker was able to execute %v work loops\n", count)
}
politeWorker := func() {
defer wg.Done()
var count int
for begin := time.Now(); time.Since(begin) < runtime; {
sharedLock.Lock()
time.Sleep(1 * time.Nanosecond)
sharedLock.Unlock()
sharedLock.Lock()
time.Sleep(1 * time.Nanosecond)
sharedLock.Unlock()
sharedLock.Lock()
time.Sleep(1 * time.Nanosecond)
sharedLock.Unlock()
count++
}
fmt.Printf("Polite worker was able to execute %v work loops\n", count)
}
wg.Add(2)
go greedyWorker()
go politeWorker()
wg.Wait()
}
Greedy worker was able to execute 688386 work loops
Polite worker was able to execute 339861 work loops

--

--

--

Software engineer

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Takanori Ishibashi

Takanori Ishibashi

Software engineer

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