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Run results for:
Date loops
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=626527" width="100%" height="500px"></iframe>
Run details:
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:
Safari 26
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one month ago
Test name
Executions per second
Parsed
268.2 Ops/sec
Not parsed
450.2 Ops/sec
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; }