Run results for: slice vs regex

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

slice

9.4M/s

regex

6.6M/s

brackets

5.3M/s

View exact numbers

Script Preparation code:

var strIn = '1234-12-34 05:27:56Z';
var strOut = '';
var regex = /\d{4}-(\d{2})-(\d{2}) (\d{2})/;

Tests:

slice
var month = strIn.slice(5, 7); var day = strIn.slice(8, 10); var hour = strIn.slice(11, 13);
regex
var [_, month, day, hour] = strIn.match(regex)
brackets
var month = strIn[5] + strIn[6]; var day = strIn[8] + strIn[9]; var hour = strIn[11] + strIn[12];