C # Performance Comparison of converting a string to a String Array

comparison of four methods:

Private void form2_load (Object sender, eventargs e) <br/>{< br/> string STR = "this mood is like the low-calorie ice cream. It's not appealing enough, I always think something is missing. "<br/> string [] A; </P> <p> skyvu. tester tester = new skyvu. tester (100000); <br/> richtextbox1.appendtext (tester. run ("tochararray", delegate () <br/>{< br/> A = splittoarray (STR); </P> <p> })); </P> <p> richtextbox1.appendtext (tester. run ("stringindex", delegate () <br/>{< br/> A = splittoarray 2 (STR); </P> <p >}); </P> <p> richtextbox1.appendtext (tester. run ("RegEx", delegate () <br/>{< br/> A = splittoarray3 (STR); </P> <p> })); </P> <p> richtextbox1.appendtext (tester. run ("LINQ", delegate () <br/>{< br/> A = splittoarray4 (STR); </P> <p> })); </P> <p >}</P> <p> Public String [] splittoarray (string Str) <br/>{< br/> char [] CHS = Str. tochararray (); <br/> string [] Sarr = new string [chs. length]; <br/> Fo R (INT I = 0; I <chs. length; I ++) <br/>{< br/> // Sarr [I] = CHS [I]. tostring (); <br/> Sarr [I] = new string (CHS [I], 1); <br/>}< br/> return Sarr; <br/>}</P> <p> Public String [] splittoarray2 (string Str) <br/>{< br/> string [] Sarr = new string [Str. length]; <br/> for (INT I = 0; I <Str. length; I ++) <br/>{< br/> Sarr [I] = STR [I]. tostring (); <br/>}< br/> return Sarr; <br/>}< br/> // Private Static RegEx regsplit = new RegEx ("(?! ^ | $) ", Regexoptions. compiled); // no significant improvement <br/> Public String [] splittoarray3 (string Str) <br/>{< br/> return RegEx. split (STR ,"(?! ^ | $) "); <Br/> // return regsplit. split (STR); <br/>}</P> <p> Public String [] splittoarray4 (string Str) <br/>{< br/> return (from CH in STR select ch. tostring ()). toarray (); <br/>}

Tester class source code

 

Result:

Tochararray: 128 Ms <br/> stringindex: 135 ms <br/> RegEx: 2480 Ms <br/> LINQ: 469 MS