.NET Core到底有多強?

時間 2019-12-09

標籤 core 到底简体版

原文原文鏈接

測試代碼:
C# Release 未優化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
測試

Framework 4.6.1
優化

C# Release 優化.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 未優化(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("用時:", time.Now().Sub(t1))
    }
    // Output:
}

go 優化(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("用時:", time.Now().Sub(t1))
    }
    // Output:
}

java 8 未優化（照抄C#）
string

java 8 優化（照抄C#）
it

因爲go沒有靜態變量
class

.net core 非靜態

java 8