Accurate date and time depiction at a high resolution using JSON and JavaScript

Is there a standardized method for displaying high-resolution timestamps in JSON and/or JavaScript?

It would be ideal to have support for at least 100 ns resolution, as it would simplify the server code (due to the 100 ns resolution of the .NET DateTime).

I have come across numerous inquiries regarding high-resolution timers, but I simply need a way to represent it in an application API.

This pertains to an API developed in REST style using JSON, so precise time measurement in this resolution is not necessary. Nevertheless, the goal is to transmit and utilize (potentially in JavaScript) the timestamp with its full 100 ns resolution (in line with .NET standards).

javascript.netjsondatetimetime

Answer №1

Upon further reflection, could it be said that your timestamp is essentially an extremely large integer? The current timestamp reads 1329826212. If you require nanosecond precision, we are essentially adding 9 more digits, resulting in 1329826212000000000. This is a number that can be easily processed by JavaScript. Simply transmit it as follows:

myobject = {
    "time": 1329826212000000000
}

This should work without any issues. I conducted several arithmetic operations on it, such as division by a large number and multiplication by the same number, without experiencing any loss of value.

JavaScript offers support for a vast range of floating point numbers, while maintaining integral accuracy from -2^53 to 2^53. Therefore, I believe you should be all set.

UPDATE I apologize for the oversight. Upon reviewing your query, are you looking to visually represent it? One approach could involve isolating the last 9 digits (for added precision beyond the second level) and displaying them as the decimal portion of the number. You could also opt to extract the last 6 digits (enhanced precision beyond the millisecond level).

Answer №2

When it comes to the JavaScript Date object, precision is limited to milliseconds.

For encoding nanosecond precision times in a standard format, consider using an ISO 8601 format string, which allows you to define nanoseconds as fractions of seconds:

Decimal fractions can be added to any of the three time elements. A decimal point, either a comma or a dot, is used as a separator between the time element and its fraction. It is essential to add a fraction only to the lowest order time element. For instance, to represent "14 hours, 30 and one half minutes," the seconds figure should be omitted and represented as "14:30,5," "1430,5," "14:30.5," or "1430.5." The decimal fraction can have any number of decimal places, but it should be agreed upon by the communicating parties.

Sites like jsperf.com and benchmarkjs.com use a clever trick involving a small Java applet that exposes Java's nanosecond timer.

Check out the discussion on Stack Overflow about getting current time in nanoseconds using JavaScript: Is there any way to get current time in nanoseconds using JavaScript?.

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