Run results for: forEach vs regex in vowel counting

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Browser: Chrome 52

Operating system: Windows 7

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
forEach version	1010246.0 Ops/sec
regexVersion	1456395.0 Ops/sec

Tests:

forEach version
// useful for HtmlCollection, NodeList, String types function forEach(array, callback, scope){for (var i=0,n=array.length; i<n; i++)callback.call(scope, array[i], i, array);} // passes back stuff we need function countVowels(input) { var vowels = 'aeiou', result = 0; forEach( input, function(char){ if (vowels.indexOf(char) != -1) result++; } ); return result; } countVowels("goes");
regexVersion
function VowelCount(str) { var pattern = /[aeiou]/i; var vowelCount = 0; for (var i = 0; i < str.length; i++) { if (pattern.test(str[i])){ vowelCount++; } } return vowelCount; } VowelCount("goes")