Benchmark: Should you cache Intl.DateTimeFormat?

Script Preparation code:

FORMAT = { day: '2-digit', month: 'short', year: 'numeric' }
cache = new Map()

Tests:

No caching
const date = new Intl.DateTimeFormat('en-AU', FORMAT).format(new Date())
With JSON-keyed cache
const key = JSON.stringify(FORMAT) let formatter = cache.get(key) if (!formatter) { formatter = new Intl.DateTimeFormat('en-AU', FORMAT) cache.set(key, formatter) } const date = formatter.format(new Date())

Rendered benchmark preparation results:

Previous results

Test case name	Result
No caching
With JSON-keyed cache

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Latest run results:

Run details: (Test run date: 17 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Mac OS X 10.15.7

Test name	Executions per second
No caching	30937.5 Ops/sec
With JSON-keyed cache	859731.6 Ops/sec

Should you cache Intl.DateTimeFormat? (version: 0)