Run results for: Array Remove vs String Replace

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 9_3_5 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) GSA/18.0.130791545 Mobile/13G36 Safari/600.1.4

Browser: Mobile Safari 9

Operating system: iOS 9.3.5

Device Platform: iPad

Date tested: 7 years ago

Test name	Executions per second
String Replace No Compare	330428.9 Ops/sec
String Replace With Compare	458181.5 Ops/sec
Convert to Array	275174.3 Ops/sec
Remove From Array	1011647.0 Ops/sec

Script Preparation code:

var str = 'fred red bed said', searchTerm = 'bed',
    arr = str.split(' ');
function removeSubstr(str, substr){
	tmp = " " + str + " ";
	substr = " " + substr + " ";
	if (tmp.indexOf(substr) !== -1 ) {
  		tmp = tmp.replace(substr, "").trim(); 
  		return tmp
	}
  return str;
}

function removeSubstr2(str, substr){
	var len = str.length, tmp = (" " + str + " ").replace(" " + substr + " ", "").trim(); 
	if ( str.length < len ) return tmp;
  	return str;
}

function removeSubstr3(str, substr){
  var strSpl = str.split(' '), idx = strSpl.indexOf(substr);
  if ( idx > -1) {
    return strSpl.splice(idx, 1).join(' ');
  }
  return str;
}

function removeElem(arr, substr){
  var idx = arr.indexOf(substr);
  if ( idx > -1) {
    return arr.splice(idx, 1);
  }
  return arr;
}

Tests:

String Replace No Compare
removeSubstr(str, searchTerm)
String Replace With Compare
removeSubstr2(str, searchTerm)
Convert to Array
removeSubstr3(str, searchTerm)
Remove From Array
removeElem(arr, searchTerm)

Run results for: Array Remove vs String Replace

String Replace No Compare

String Replace With Compare

Convert to Array

Remove From Array