~~~ package main import ( "fmt" "sync" "sync/atomic" "time" ) func main() { const numGoroutines = 100 const iterations = 100000 var data int32 // 使用int32類型以支持原子操作 var wg sync.WaitGroup startTime := time.Now() for i := 0; i < numGoroutines; i++ { wg.Add(1) go func() { for j := 0; j < iterations; j++ { atomic.AddInt32(&data, 1) // 使用原子操作代替互斥鎖 } wg.Done() }() } wg.Wait() endTime := time.Now() elapsedTime := endTime.Sub(startTime) fmt.Println("Final data value:", data) fmt.Println("Total time taken:", elapsedTime) } ~~~