. Net c # Stopwatch usage

Generally, we want to test the method or the type with higher efficiency. We can use the Stopwatch class for testing. I only know it now.

Let's look at a small example.

Prerequisite: first reference using System. Diagnostics; namespace.

1 // instantiate a sw
2 Stopwatch sw = new Stopwatch ();
3 // start counting
4 sw. Start ();
5
6 // instantiate an sb
7 StringBuilder sb = new StringBuilder ();
8
9 // Loop
10 for (int I = 0; I <10000; I ++)
11 {
12 // append
13 sb. Append (I );
14}
15 // output time in milliseconds
16 Console. WriteLine (sw. ElapsedMilliseconds );
17
18 // reset to 0
19 sw. Reset ();
20 // start counting
21 sw. Start ();
22 // define an s string
23 string s = "";
24
25 // Loop
26 for (int I = 0; I <10000; I ++)
27 {
28 s = s + I;
29