.NET Core到底有多强?

时间：2019-04-03 18:26:52 阅读：167 评论：0 收藏：0 [点我收藏+]

测试代码:
C# Release 未优化

class Program
    {
        static long counter = 0;
        static void Main(string[] args)
        {
            for (int m = 0; m < 100; m++)
            {
                Stopwatch s = new Stopwatch();
                s.Start();
                for (long i = 0; i < 200000000; i++)
                {
                    counter = counter * 2 + 3;
                }
                s.Stop();
                Console.WriteLine(s.Elapsed.TotalMilliseconds + " ms");
            }
            Console.ReadLine();
        }
    }

Core 2.2
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Framework 4.6.1
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C# Release 优化

class Program
    {
        static long counter = 0;
        static void Main(string[] args)
        {
            for (int m = 0; m < 100; m++)
            {
                Stopwatch s = new Stopwatch();
                s.Start();
                long temp = counter;
                for (long i = 0; i < 200000000; i++)
                {
                    temp = temp * 2 + 3;
                    counter = temp;
                }
                s.Stop();
                Console.WriteLine(s.Elapsed.TotalMilliseconds + " ms");
            }
        }
    }

Core 2.2
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Framework 4.6.1

go 未优化(照抄C#)

var counter int64 = 0
func ExampleLinq_3() {
    for m := 0; m < 100; m++ {
        t1 := time.Now()
        for i := 0; i < 200000000; i++ {
            counter = counter*2 + 3
        }
        fmt.Println("用时:", time.Now().Sub(t1))
    }
    // Output:
}

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go 优化(照抄C#)

var counter int64 = 0
func ExampleLinq_4() {
    for m := 0; m < 100; m++ {
        t1 := time.Now()
        temp := counter
        for i := 0; i < 200000000; i++ {
            temp = temp*2 + 3
            counter = temp
        }
        fmt.Println("用时:", time.Now().Sub(t1))
    }
    // Output:
}

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