Run results for: Try/catch performance for control flow

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Try/catch	1514.7 Ops/sec
Without try/catch	1812703.5 Ops/sec

HTML Preparation code:

<div id="test"></div>

Tests:

Try/catch
function checkEven(num) { if (num % 2 === 0) { return true; } throw new Error('Number is odd'); } for (let i = 0; i < 1000;++i) { let res; try { checkEven(i); res = true; } catch (err) { res = false; } }
Without try/catch
function checkEven(num) { if (num % 2 === 0) { return true; } return false; } for (let i = 0; i < 1000;++i) { let res; if (checkEven(i)) { res = true; } else { res = false; } }