Performance comparison of arrays, list<>, ArrayList

Tag:list<t>    performance     array    

Static void main (String[] args) {    stopwatch sw = new  Stopwatch ();    int[] intarray = new int[100];     Sw. Start ();    for  (int i = 0; i < 100; i++)      {        intArray[i] = i;   &NBSP;&NBSP;}&NBSP;&NBSP;&NBSP;&NBSP;SW. Stop ();     console.writeline (" Add 0 ~ 100 to int[100]  :  "&NBSP;+&NBSP;SW. Elapsed);     arraylist list = new arraylist ();     Sw = new stopwatch ();     sw. Start ();    for  (int i = 0; i < 100; i++)      {        list. ADD (i);     }&NBSP;&NBSP;&NBSP;&NBSP;SW. Stop ();     console.writeline (" add 0 ~ 100 to arraylist  :  "&NBSP;+&NBSP;SW. Elapsed);    list<int> intlist = new list<int> ();     sw = new stopwatch ();     sw. Start ();    for  (int i = 0; i < 100; i++)      {        intlist.add (i);     } &NBSP;&NBSP;&NBSP;&NBSP;SW. Stop ();     console.writeline (" add 0 ~ 100 to list<int > :  "&NBSP;+&NBSP;SW. Elapsed);     console.readline ();}

Effect

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You can see that the array is significantly faster, but must initialize the length

Visual reason is that a boxing operation occurred when adding elements to the ArrayList

This article is from the "lybing" blog, make sure to keep this source http://lybing.blog.51cto.com/3286625/1787125

Performance comparison of arrays, list<>, ArrayList