Replace All vs Split/Join

JavaScript performance comparison

Revision 12 of this test case created by

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  str = "Test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test abc test test abc test...";
  
  reg_exp = new RegExp('abc', 'g');
  
  replaceAllRecursive = function(string, replace_what, replace_with, prevstring) {
    if (prevstring && string === prevstring)
      return string;
    prevstring = string.replace(replace_what, replace_with);
    return replaceAllRecursive(prevstring, replace_what, replace_with, string);
  };
  
  replaceAllLoopy = function(string, replace_what, replace_with) {
    while(true){
      var newstring = string.replace(replace_what, replace_with);
      if (newstring === string) return string;
      string = newstring;
      }
  };
  
  String.prototype.replaceAll = function(replace_what, replace_with) {
  		var oldstring = this;
  		while (true) {
  			var newstring = oldstring.replace(replace_what, replace_with);
  			if (newstring === oldstring) return oldstring;
  			oldstring = newstring;
  			}
  		};

        
  };


      
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
split & join 
str = str.split("abc").join("");
 pending…
replace with inline regexp 
str = str.replace(/abc/g, '');
 pending…
replace with cached regexp 
str = str.replace(reg_exp, '');
 pending…
recursive replace() 
str = replaceAllRecursive(str, "abc", "");
 pending…
iterative replace() 
str = replaceAllLoopy(str, "abc", "");
 pending…
iterative replace() as String method 
str = str.replaceAll("abc", "");
 pending…

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Revisions

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