Benchmark: Date loops - MeasureThat.net

Script Preparation code:

let periods = Array.from({length: 10000}).map((_,idx) => ({start: new Date(1000 * idx).toISOString() , end: new Date(1000 * idx + 500).toISOString()}))

Tests:

Parsed
const parsed = periods.map(p => ({ start: new Date(p.start), end: new Date(p.end) })); const merged = [parsed[0]]; for (let i = 1; i < parsed.length; i++) { const last = merged[merged.length - 1]; if (last.end >= parsed[i].start) { last.end = new Date(Math.max(last.end, parsed[i].end)); } else { merged.push(parsed[i]); } } merged.forEach(p => p.end = p.end.toISOString()); periods = merged;
Not parsed
if (periods.length > 1) { const merged = [ periods[0] ]; for (let i = 1; i < periods.length; i++) { const last = merged[merged.length - 1]; if (new Date(last.end) >= new Date(periods[i].start)) { last.end = new Date(Math.max(new Date(last.end), new Date(periods[i].end))).toISOString(); } else { merged.push(periods[i]); } } periods = merged; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Parsed
Not parsed

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Safari/605.1.15

Browser/OS: Safari 26 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Parsed	268.2 Ops/sec
Not parsed	450.2 Ops/sec

Related benchmarks:

Date loops (version: 2)

Comparing performance of: Parsed vs Not parsed

Created: one month ago by: Registered User

Jump to the latest result

Parsed

Not parsed

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A