c# - Get subarray of byte -

in c#, how can sub array of bytes this

byte[] arrbyte1 = {11,22,33,44,55,66}

i need reference sub array of 2 bytes 33 , 44 values.

i found multiple options there array.copy, arraysegment, linq (skip , take) in c#. best solution performance point of view?

easy perfomance test:

public void test() {     const int max = 1000000;      byte[] arrbyte1 = { 11, 22, 33, 44, 55, 66 };     byte[] arrbyte2 = new byte[2];     stopwatch sw = new stopwatch();      // array.copy     sw.start();     (int = 0; < max; i++)     {         array.copy(arrbyte1, 2, arrbyte2, 0, 2);     }     sw.stop();     console.writeline("array.copy: {0}ms", sw.elapsedmilliseconds);      // linq     sw.start();     (int = 0; < max; i++)     {         arrbyte2 = arrbyte1.skip(2).take(2).toarray();     }     sw.stop();     console.writeline("linq: {0}ms", sw.elapsedmilliseconds); } 

result:

array.copy: 28ms linq: 189ms 

perfomance test on large data:

public void test() {     const int max = 1000000;      int[] arrbyte1 = enumerable.range(0, 1000).toarray();     int[] arrbyte2 = new int[500];     stopwatch sw = new stopwatch();      // array.copy     sw.start();     (int = 0; < max; i++)     {         array.copy(arrbyte1, 500, arrbyte2, 0, 500);     }     sw.stop();     console.writeline("array.copy: {0}ms", sw.elapsedmilliseconds);      // linq     sw.start();     (int = 0; < max; i++)     {         arrbyte2 = arrbyte1.skip(500).take(500).toarray();     }     sw.stop();     console.writeline("linq: {0}ms", sw.elapsedmilliseconds); } 

result:

array.copy: 186ms linq: 12666ms 

as see, on large data linq have troubles.