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How can I create a Node.JS accurate timer? It should look like a kitchen timer or a stopwatch.

And I need accuracy, as much as possible. The application will promote some kind of "clicks war". I need to store every (concurrent) user's click, noting seconds and milliseconds (to tie the game).

How can I do it? Are there some code sample?

Thanks in advance.

How can I create a Node.JS accurate timer? It should look like a kitchen timer or a stopwatch.

And I need accuracy, as much as possible. The application will promote some kind of "clicks war". I need to store every (concurrent) user's click, noting seconds and milliseconds (to tie the game).

How can I do it? Are there some code sample?

Thanks in advance.

• javascript
• node.js
• timer

Share Improve this question Follow edited Feb 5, 2014 at 4:26 Farid Nouri Neshat 30.4k66 gold badges7777 silver badges125125 bronze badges asked Nov 25, 2011 at 0:05 sonnuforevissonnuforevis 1,31177 gold badges2222 silver badges3838 bronze badges 1

• 1 Worth a note for the new native API for it nodejs.org/api/process.html#process_process_hrtime - see the link for possible usages – Fabiano Soriani Commented Mar 2, 2015 at 21:07

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1 Answer 1

Sorted by: Reset to default 24

Well You should have a look at microtime module, which gives you the time as accurate as microseconds. You can even measure CPU tick time with it!

As of the code well you can do something like this (Storing the time in objects and then accessing them with the user id, advantage would be no duplicate of the same user and faster access to one, if the user name is known):

var microtime = require('microtime');
  , clicks = {};

click(function(user){ // An event listener for received clicks
  clicks[user] = microtime.now();
});

or (pushing all in an array, advantage would be that it can be sorted, and easily all of them be iterated)

var microtime = require('microtime');
  , clicks = [];

click(function(user){ // An event listener for received clicks
  clicks.push({
    user : user,
    time : microtime.now()
  });
});

As of node v0.8.0 you can use process.hrtime() which will return an array both containing a relative seconds and nanoseconds to past.

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