Run results for: For vs indexof

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0

Browser: Firefox 51

Operating system: Windows

Device Platform: Other

Date tested: 8 years ago

Test name	Executions per second
for loop	980088.7 Ops/sec
indexof ubstring test	3700696.0 Ops/sec
Regex	4299475.0 Ops/sec

Tests:

for loop
var splitParameters = "=&=&=&to=&cc=&bcc=&subjectbox=&composeid=1476889432826&from=robebsta%40gmail.com&subject=&draft=157dd78731699d77&bwd=&rm=&cans=&ctok=&ac=&adc=&ishtml=1&nowrap=0&body=%3Cdiv%20dir%3D%22ltr%22%3E%3Cdiv%20class%3D%22gmail_default%22%20style%3D%22font-family%3Aarial%2Chelvetica%2Csans-serif%22%3Easdasdasdffbbfffsdfdsfggjjjjtrset%3C%2Fdiv%3E%3C%2Fdiv%3E&pte=&pti=&bpfs=&uet=&pbgt=&pbgas=&pbgir=&msg_encrypt=0&signature=0&"; splitParameters = splitParameters.split("&"); for (var i = 0; i < splitParameters.length; i++) { var bodyContentIteration = splitParameters[i]; if (bodyContentIteration.indexOf("draft=") > -1) { return bodyContentIteration.replace("draft=",""); } }
indexof ubstring test
var bodyContent = "=&=&=&to=&cc=&bcc=&subjectbox=&composeid=1476889432826&from=robebsta%40gmail.com&subject=&draft=157dd78731699d77&bwd=&rm=&cans=&ctok=&ac=&adc=&ishtml=1&nowrap=0&body=%3Cdiv%20dir%3D%22ltr%22%3E%3Cdiv%20class%3D%22gmail_default%22%20style%3D%22font-family%3Aarial%2Chelvetica%2Csans-serif%22%3Easdasdasdffbbfffsdfdsfggjjjjtrset%3C%2Fdiv%3E%3C%2Fdiv%3E&pte=&pti=&bpfs=&uet=&pbgt=&pbgas=&pbgir=&msg_encrypt=0&signature=0&"; startIndex = bodyContent.indexOf("&draft="); if (startIndex > -1) { var endIndex = bodyContent.indexOf("&", startIndex + 1); return bodyContent.substring(startIndex + 7, endIndex); }
Regex
var regex = /&draft=(.*?)&/g; var regexMatch = regex.exec("=&=&=&to=&cc=&bcc=&subjectbox=&composeid=1476889432826&from=robebsta%40gmail.com&subject=&draft=157dd78731699d77&bwd=&rm=&cans=&ctok=&ac=&adc=&ishtml=1&nowrap=0&body=%3Cdiv%20dir%3D%22ltr%22%3E%3Cdiv%20class%3D%22gmail_default%22%20style%3D%22font-family%3Aarial%2Chelvetica%2Csans-serif%22%3Easdasdasdffbbfffsdfdsfggjjjjtrset%3C%2Fdiv%3E%3C%2Fdiv%3E&pte=&pti=&bpfs=&uet=&pbgt=&pbgas=&pbgir=&msg_encrypt=0&signature=0&"); if (regexMatch != null && regexMatch.length > 1) { var messageId = regexMatch[1]; }

Run results for: For vs indexof

for loop

indexof ubstring test

Regex