.NET Core到底有多强?

时间 2019-12-09

标签 core 到底繁體版

原文原文链接

测试代码:
C# Release 未优化java

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
测试

Framework 4.6.1
优化

C# Release 优化.net

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

Framework 4.6.1
pwa

go 未优化(照抄C#)code

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:
}

go 优化(照抄C#)blog

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:
}

java 8 未优化（照抄C#）
string

java 8 优化（照抄C#）
it

因为go没有静态变量
class

.net core 非静态

java 8