Run results for: Date Math, 1

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36

Browser: Chrome 95

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Using Math	676937.4 Ops/sec
Using Date Object	467710.6 Ops/sec
Small Date Object	492452.1 Ops/sec
Even smaller Date Object	502839.8 Ops/sec

Script Preparation code:

let startDate = new Date();

Tests:

Using Math
const getNextMonth = (startDate) => { let current; if (startDate.getMonth() == 11) { current = new Date(startDate.getFullYear() + 1, 0, 1); } else { current = new Date(startDate.getFullYear(), startDate.getMonth() + 1, 1); } return current.getMonth(); }; let startDate = new Date(); getNextMonth(startDate);
Using Date Object
const outputDate = (date, output = 'month') => { switch (output) { default: case 'month': return date.getMonth(); case 'fulldate': return date; case 'year': return date.getFullYear(); } }; const changeMonth = (current = new Date(), change) => { if (change === 0) return current; const unformatted = new Date(current).setMonth(current.getMonth() + change); const formatted = new Date(unformatted); return formatted; }; const getNextMonth = (current = new Date(), output = 'month') => { const nextMonth = changeMonth(current, 1); return outputDate(nextMonth, output); }; let startDate = new Date(); getNextMonth(startDate)
Small Date Object
const changeMonth = (current, change) => { if (change === 0) return current; const unformatted = new Date(current).setMonth(current.getMonth() + change); return new Date(unformatted); }; const getNextMonth = (current) => { return changeMonth(current, 1).getMonth() }; let startDate = new Date(); getNextMonth(startDate)
Even smaller Date Object
const getNextMonth = (current) => { const unformatted = new Date(current).setMonth(current.getMonth() + 1) return new Date(unformatted).getMonth() }; let startDate = new Date(); getNextMonth(startDate)

Run results for: Date Math, 1

Using Math

Using Date Object

Small Date Object

Even smaller Date Object