Run results for: regex replace with and without for (very long text)

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/107.0.5304.66 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 107

Operating system: iOS 16.1

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
replace with for	12.5 Ops/sec
replace without for	6.0 Ops/sec

Script Preparation code:

var sentence = "Lorem Ipsum is simply dummy text of the printing and typesetting industry.";
var wordList = sentence.split(' ');

var longText = "Lorem Ipsum is simply dummy text of the printing and typesetting industry."

for (let i = 0; i < 10; i += 1) {
  longText = longText + " " + longText
}

Tests:

replace with for
for (let i = 0; i < wordList.length; i += 1) { var re = new RegExp("(" + wordList[i] + ")", "gi"); longText = longText.replace( re, '<span>$1</span>' ); }
replace without for
var re = new RegExp("(" + wordList.join('|') + ")", "gi"); longText = longText.replace( re, '<span>$1</span>' );

Run results for: regex replace with and without for (very long text)

replace with for

replace without for