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Is there any way to get current time in nanoseconds using JavaScript?

Tags:

javascript

time

precision

time-precision

So, I know I can get current time in milliseconds using JavaScript. But, is it possible to get the current time in nanoseconds instead?

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Carlos Melo Avatar asked May 14 '11 15:05

Carlos Melo

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How much time is a nanosecond?

A nanosecond (ns or nsec) is one billionth (10-9) of a second and is a common measurement of read or write access time to random access memory (RAM). Admiral Grace Hopper famously handed out foot-long lengths of wire to students to illustrate how far an electrical signal can travel in a nanosecond.

How do you write milliseconds in JavaScript?

JavaScript - Date getMilliseconds() Method Javascript date getMilliseconds() method returns the milliseconds in the specified date according to local time. The value returned by getMilliseconds() is a number between 0 and 999.

What is JavaScript date now ()?

now() The static Date. now() method returns the number of milliseconds elapsed since January 1, 1970 00:00:00 UTC.

What is timestamp in JavaScript?

A Timestamp represents a point in time independent of any time zone or calendar, represented as seconds and fractions of seconds at nanosecond resolution in UTC Epoch time.

1 Answers

Achieve microsecond accuracy in most browsers using:

window.performance.now()

See also:

  • https://developer.mozilla.org/en-US/docs/Web/API/Performance.now()
  • http://www.w3.org/TR/hr-time/
  • https://caniuse.com/high-resolution-time
like image 102
Jeffrey Yasskin Avatar answered Sep 22 '22 11:09

Jeffrey Yasskin
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