How do I measure the execution time of JavaScript code with callbacks

0 votes

I have a piece of JavaScript code that I am executing using the node.js interpreter.

for(var i = 1; i < LIMIT; i++) {
  var user = {
    id: i,
    name: "MongoUser [" + i + "]"
  };
  db.users.save(user, function(err, saved) {
    if(err || !saved) {
      console.log("Error");
    } else {
      console.log("Saved");
    }
  });
}

How can I measure the time taken by these database insert operations? I could compute the difference of date values after and before this piece of code but that would be incorrect because of the asynchronous nature of the code.

Sep 23, 2020 in Java-Script by kartik
• 37,520 points
814 views

1 answer to this question.

0 votes

Hello @kartik,

Use the Node.js console.time() and console.timeEnd():

var i;
console.time("dbsave");

for(i = 1; i < LIMIT; i++){
    db.users.save({id : i, name : "MongoUser [" + i + "]"}, end);
}

end = function(err, saved) {
    console.log(( err || !saved )?"Error":"Saved");
    if(--i === 1){console.timeEnd("dbsave");}
};

Hope it helps!!

Thank you!!

answered Sep 23, 2020 by Niroj
• 82,880 points

Related Questions In Java-Script

0 votes
1 answer

How can I get the user's local time instead of the server's time?

Hello @kartik, For client side, you would need ...READ MORE

answered Jul 7, 2020 in Java-Script by Niroj
• 82,880 points
619 views
0 votes
1 answer

How do I copy to the clipboard in JavaScript?

Hello @kartik, To copy HTML , you can ...READ MORE

answered Aug 28, 2020 in Java-Script by Niroj
• 82,880 points
826 views
0 votes
1 answer

How can I determine the type of an HTML element in JavaScript?

Hello @kartik, nodeName is the attribute you are looking ...READ MORE

answered Oct 8, 2020 in Java-Script by Niroj
• 82,880 points
2,194 views
0 votes
1 answer

How do I search for a key of object in javascript?

Use hasOwnProperty(key) for (let i = 0; i ...READ MORE

answered Oct 14, 2020 in Java-Script by Niroj
• 82,880 points
2,385 views
0 votes
1 answer

jQuery AJAX fires error callback on window unload - how do I filter out unload and only catch real errors?

Hello, In the error callback or $.ajax you have three ...READ MORE

answered Apr 27, 2020 in Java-Script by Niroj
• 82,880 points
4,054 views
0 votes
1 answer

How do I pass command line arguments to a Node.js program?

Hello @kartik, If your script is called myScript.js ...READ MORE

answered May 5, 2020 in Java-Script by Niroj
• 82,880 points
3,131 views
0 votes
1 answer

Error:Issue when trying to use IN() in wordpress database

Hello @kartik, Try this code : // Create an ...READ MORE

answered May 8, 2020 in PHP by Niroj
• 82,880 points
1,018 views
+2 votes
1 answer

How do I debug Node.js applications?

Hello @kartik, Use node-inspector  from any browser supporting WebSocket. Breakpoints, ...READ MORE

answered Jul 8, 2020 in Node-js by Niroj
• 82,880 points
968 views
0 votes
1 answer

How do I break a string across more than one line of code in JavaScript?

Hello @kartik, In your example, you can break ...READ MORE

answered Oct 8, 2020 in Java-Script by Niroj
• 82,880 points
627 views
0 votes
1 answer

How do I embed PHP code in JavaScript?

Hello @kartik, If you have individual .js files, and you ...READ MORE

answered Jul 7, 2020 in Java-Script by Niroj
• 82,880 points
8,427 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP