Run results for: ValidateUtcTimestamp (version2)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/111.0

Browser: Firefox 111

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
checkNaN	713785.4 Ops/sec
checkRound	257829.5 Ops/sec
checkRegNaN	583237.2 Ops/sec
checkReg31	337562.8 Ops/sec
checkDays	262358.6 Ops/sec
checkFixRound	132985.2 Ops/sec

Script Preparation code:

var t1 = '2019-12-31T23:59:59Z'
var t2 = '2019-12-31T23:59:59.123456789Z'
var t3 = '2019-12-31T24:00:00.00Z'
var t4 = '2019-12-31T24:00:00.123Z'
var t5 = '2019-11-31T23:59:59Z'
var t6 = '2019-29-02T23:59:59Z'
var t7 = '2020-29-02T23:59:59Z'
var t8 = '2020-00-01T23:59:59Z'
var t9 = '2020-01-00T23:59:59Z'

function checkNaN(str) {
    return !Number.isNaN(Date.parse(str))
}

function checkRound(str) {
    var date = Date.parse(str);
    if (Number.isNaN(date)) return false;
    var cmp = new Date(date).toISOString()
    var min = Math.min(str.length, cmp.length)
//    return str.substring(0, min - 1) === cmp.substring(0, min - 1)
}

var reg = /^\d{4}-(\d{2})-(\d{2})T((\d{2}):[0-5]\d:[0-5]\d)(.\d{1,9})?Z$/
var fill = '0000-00-00T00:00:00.000000000Z'

function checkFixRound(str) {
    var len = str.length
    var fix = str.substring(0, len - 1) + fill.substring(len - 1, 30)
    var date = Date.parse(fix);
    if (Number.isNaN(date)) return false;
    var cmp = new Date(date).toISOString()
    return fix.substring(0, 23) === cmp.substring(0, 23)
}

function checkRegNaN(str) {    
    var date = Date.parse(str)
    if (Number.isNaN(date)) return false
    return reg.test(str)
}

function checkReg31(str) {
    var match = str.match(reg)
    if (!match) return false
    var [, month, day, time, hour, millisecond] = match
    if (month == '00' || month > '12' || day == '00' || day > '31') return false

    if (time === '24:00:00' && (millisecond === undefined || /^\.0*$/.test(millisecond))) return true
    return hour <= '23'
}

var dpm = ['', '31', '29', '31', '30', '31', '30', '31', '31', '30', '31', '30', '31']

function checkDays(str) {
    var match = str.match(reg)
    if (!match) return false
    var [, month, day, time, hour, millisecond] = match
    if (day === '00' || day > dpm[+month]) return false

    if (time === '24:00:00' && (millisecond === undefined || /^\.0*$/.test(millisecond))) return true
    return hour <= '23'
}

Tests:

checkNaN
checkNaN(t1) checkNaN(t2) checkNaN(t3) checkNaN(t4) checkNaN(t5) checkNaN(t6) checkNaN(t7) checkNaN(t8) checkNaN(t9)
checkRound
checkRound(t1) checkRound(t2) checkRound(t3) checkRound(t4) checkRound(t5) checkRound(t6) checkRound(t7) checkRound(t8) checkRound(t9)
checkRegNaN
checkRegNaN(t1) checkRegNaN(t2) checkRegNaN(t3) checkRegNaN(t4) checkRegNaN(t5) checkRegNaN(t6) checkRegNaN(t7) checkRegNaN(t8) checkRegNaN(t9)
checkReg31
checkReg31(t1) checkReg31(t2) checkReg31(t3) checkReg31(t4) checkReg31(t5) checkReg31(t6) checkReg31(t7) checkReg31(t8) checkReg31(t9)
checkDays
checkDays(t1) checkDays(t2) checkDays(t3) checkDays(t4) checkDays(t5) checkDays(t6) checkDays(t7) checkDays(t8) checkDays(t9)
checkFixRound
checkFixRound(t1) checkFixRound(t2) checkFixRound(t3) checkFixRound(t4) checkFixRound(t5) checkFixRound(t6) checkFixRound(t7) checkFixRound(t8) checkFixRound(t9)

Run results for: ValidateUtcTimestamp (version2)

Different methods to detect, if a timestamp is valid.

checkNaN

checkRound

checkRegNaN

checkReg31

checkDays

checkFixRound