1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859
import Benchmark from "benchmark";
const datetimeValidationSuite = new Benchmark.Suite("datetime");
const DATA = "2021-01-01";const MONTHS_31 = new Set([1, 3, 5, 7, 8, 10, 12]);const MONTHS_30 = new Set([4, 6, 9, 11]);
const simpleDatetimeRegex = /^(\d{4})-(\d{2})-(\d{2})$/;const datetimeRegexNoLeapYearValidation =  /^\d{4}-((0[13578]|10|12)-31|(0[13-9]|1[0-2])-30|(0[1-9]|1[0-2])-(0[1-9]|1\d|2\d))$/;const datetimeRegexWithLeapYearValidation =  /^((\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-((0[13578]|1[02])-(0[1-9]|[12]\d|3[01])|(0[469]|11)-(0[1-9]|[12]\d|30)|(02)-(0[1-9]|1\d|2[0-8])))$/;
datetimeValidationSuite  .add("new Date()", () => {    return !isNaN(new Date(DATA).getTime());  })  .add("regex (no validation)", () => {    return simpleDatetimeRegex.test(DATA);  })  .add("regex (no leap year)", () => {    return datetimeRegexNoLeapYearValidation.test(DATA);  })  .add("regex (w/ leap year)", () => {    return datetimeRegexWithLeapYearValidation.test(DATA);  })  .add("capture groups + code", () => {    const match = DATA.match(simpleDatetimeRegex);    if (!match) return false;
    // Extract year, month, and day from the capture groups    const year = Number.parseInt(match[1], 10);    const month = Number.parseInt(match[2], 10); // month is 0-indexed in JavaScript Date, so subtract 1    const day = Number.parseInt(match[3], 10);
    if (month === 2) {      if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {        return day <= 29;      }      return day <= 28;    }    if (MONTHS_30.has(month)) {      return day <= 30;    }    if (MONTHS_31.has(month)) {      return day <= 31;    }    return false;  })
  .on("cycle", (e: Benchmark.Event) => {    console.log(`${datetimeValidationSuite.name!}: ${e.target}`);  });
export default {  suites: [datetimeValidationSuite],};