Run results for: Template string vs array join

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.128 Safari/537.36

Browser: Chrome 89

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Template string slicing	32295930.0 Ops/sec
Array push and join	1384780.0 Ops/sec

Tests:

Template string slicing
const id = '10135533-2332-4012-aada-b36571a05399'; `${id.slice(1, 8)}${id.slice(9, 13)}${id.slice(15, 18)}`
Array push and join
const id = '10135533-2332-4012-aada-b36571a05399'; const timeStampParts = [] const chars = id.split('') let index = 0 for (const char of chars) { if ( (index !== 0 && index < 8) || (index >= 9 && index < 13) || (index >= 15 && index < 18) ) { timeStampParts.push(char) } index += 1 } const timestamp = timeStampParts.join('')