Benchmark: Creation of an Array of Date ISO Strings

Tests:

For loop + Array.push
const start = new Date("2020-06-01"); const end = new Date("2026-05-01"); let dates = []; for (let currentDate = start; currentDate <= end; currentDate.setMonth(currentDate.getMonth() + 1)) { dates.push(currentDate.toISOString().split("T")[0]); }
For loop + Spread Operator
const start = new Date("2020-06-01"); const end = new Date("2026-05-01"); let dates = []; for (let currentDate = start; currentDate <= end; currentDate.setMonth(currentDate.getMonth() + 1)) { dates = [...dates, currentDate.toISOString().split('T')[0]]; }
While + Array.push
const start = new Date("2020-06-01"); const end = new Date("2026-05-01"); let dates = []; let currentDate = start; while (currentDate <= end) { dates.push(currentDate.toISOString().split("T")[0]); currentDate.setMonth(currentDate.getMonth() + 1); }
While + Spread Operator
const start = new Date("2020-06-01"); const end = new Date("2026-05-01"); let dates = []; let currentDate = start; while (currentDate <= end) { dates = [...dates, currentDate.toISOString().split('T')[0]]; currentDate.setMonth(currentDate.getMonth() + 1); }
Array.from
const start = new Date("2020-06-01"); const end = new Date("2026-05-01"); let dates = Array.from( { length: (end.getFullYear() - start.getFullYear()) * 12 }, (_, i) => new Date(start.getFullYear(), start.getMonth() + i, 1).toISOString().split('T')[0] );

Rendered benchmark preparation results:

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Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

Creation of an Array of Date ISO Strings (version: 0)