They may tweak results of “artificial tests” compared to “normal usage”, especially when we benchmark something very small, such as how an operator works, or a built-in function. Modern JavaScript engines perform many optimizations. That may lead to wrong results.įor more reliable benchmarking, the whole pack of benchmarks should be rerun multiple times. And by the time of running bench(diffGetTime) that work has finished.Ī pretty real scenario for a modern multi-process OS.Īs a result, the first benchmark will have less CPU resources than the second. Imagine that at the time of running bench(diffSubtract) CPU was doing something in parallel, and it was taking resources. Wow! Using getTime() is so much faster! That’s because there’s no type conversion, it is much easier for engines to optimize. Overrides the () method.Return date2.getTime() - date1.getTime() įor (let i = 0 i < 100000 i++) f(date1, date2) Īlert( 'Time of diffSubtract: ' + bench(diffSubtract) + 'ms' ) Īlert( 'Time of diffGetTime: ' + bench(diffGetTime) + 'ms' ) Returns the primitive value of a Date object. ()Ĭonverts a date to a string using the UTC timezone. Returns the "time" portion of the Date as a human-readable string. Returns a string representing the specified Date object. Returns a string with a locality-sensitive representation of the time portion of this date, based on system settings. Returns a string with a locality-sensitive representation of this date. Returns a string with a locality sensitive representation of the date portion of this date based on system settings. Returns a string representing the Date based on the GMT (UTC) time zone. Returns a string representing the Date using toISOString().
SETDATE 0 JAVASCRIPT ISO
()Ĭonverts a date to a string following the ISO 8601 Extended Format. Returns the "date" portion of the Date as a human-readable string like 'Thu Apr 12 2018'. Sets the year (usually 2–3 digits) for a specified date according to local time. Sets the seconds for a specified date according to universal time. Sets the month for a specified date according to universal time. Sets the minutes for a specified date according to universal time. Sets the milliseconds for a specified date according to universal time. Sets the hour for a specified date according to universal time. 4 digits for 4-digit years) for a specified date according to universal time. Sets the day of the month for a specified date according to universal time. Sets the Date object to the time represented by a number of milliseconds since January 1, 1970, 00:00:00 UTC. Sets the seconds for a specified date according to local time. Sets the month for a specified date according to local time. Sets the minutes for a specified date according to local time. Sets the milliseconds for a specified date according to local time. Sets the hours for a specified date according to local time. 4 digits for 4-digit years) for a specified date according to local time. Sets the day of the month for a specified date according to local time. Returns the year (usually 2–3 digits) in the specified date according to local time. Returns the seconds ( 0– 59) in the specified date according to universal time. Returns the month ( 0– 11) in the specified date according to universal time. Returns the minutes ( 0– 59) in the specified date according to universal time. Returns the milliseconds ( 0– 999) in the specified date according to universal time.
Returns the hours ( 0– 23) in the specified date according to universal time. Returns the year (4 digits for 4-digit years) in the specified date according to universal time. Returns the day of the week ( 0– 6) in the specified date according to universal time. Returns the day (date) of the month ( 1– 31) in the specified date according to universal time. Returns the time-zone offset in minutes for the current locale. (Negative values are returned for prior times.) () Returns the numeric value of the specified date as the number of milliseconds since January 1, 1970, 00:00:00 UTC. Returns the seconds ( 0– 59) in the specified date according to local time. Returns the month ( 0– 11) in the specified date according to local time. Returns the minutes ( 0– 59) in the specified date according to local time. Returns the milliseconds ( 0– 999) in the specified date according to local time. Returns the hour ( 0– 23) in the specified date according to local time. Returns the year (4 digits for 4-digit years) of the specified date according to local time. Returns the day of the week ( 0– 6) for the specified date according to local time. Returns the day of the month ( 1– 31) for the specified date according to local time. Deprecated Object.prototype._lookupSetter_().Deprecated Object.prototype._lookupGetter_().Deprecated Object.prototype._defineSetter_().
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