performance.now() vs Date.now()

by

They both serve different purposes.

performance.now() is relative to page load and more precise in orders of magnitude. Use cases include benchmarking and other cases where a high-resolution time is required such as media (gaming, audio, video, etc.)

It should be noted that performance.now() is only available in newer browsers (including IE10+).

Date.now() is relative to the Unix epoch (1970-01-01T00:00:00Z) and dependent on system clock. Use cases include same old date manipulation ever since the beginning of JavaScript.

See When milliseconds are not enough: performance.now and now method (Internet Explorer) – MSDN for more information.

The official W3C spec can be found here: High Resolution Time API

More Related Contents:

  1. Date is in string format
  2. Convert a Unix timestamp to time in JavaScript
  3. What are valid Date Time Strings in JavaScript?
  4. How to create an accurate timer in javascript?
  5. How do you display JavaScript datetime in 12 hour AM/PM format?
  6. Convert seconds to HH-MM-SS with JavaScript?
  7. JavaScript seconds to time string with format hh:mm:ss
  8. Get the time difference between two datetimes
  9. How to convert date to timestamp?
  10. Convert HH:MM:SS string to seconds only in javascript
  11. Current time formatting with Javascript
  12. How to parse a time into a Date object from user input in JavaScript?
  13. Getting current date and time in JavaScript
  14. Convert time interval given in seconds into more human readable form
  15. How to read the correct time/duration values from Google Spreadsheet
  16. Javascript timestamp to relative time
  17. How to round time to the nearest quarter hour in JavaScript?
  18. Calculate Timezone offset only for one particular timezone
  19. How can I obtain the local time in jQuery?
  20. How to tell .hover() to wait?
  21. In JavaScript, how can I have a function run at a specific time?
  22. Is there any way to get current time in nanoseconds using JavaScript?
  23. Get a UTC timestamp [duplicate]
  24. How do I use .toLocaleTimeString() without displaying seconds?
  25. Sync JS time between multiple devices
  26. Create a unique number with javascript time
  27. Converting Youtube Data API V3 video duration format to seconds in JavaScript/Node.js
  28. Difference between two dates in minute, hours javascript
  29. Maximum Call Stack Size Exceeded During a setTimeout Call
  30. Making a live clock in javascript

Leave a Comment