JavaScript Info

I understand the advantages of loading big and common libraries like jQuery from CDN. But what abou… Read more Page Performance: To Load Multiple Library Scripts From Cdn Or Combine And Minify Those Libraries Into One Download From Server?

Is there any way to slow down the responsiveness of the client (browser)? One of our testers can re… Read more How To Emulate A Slow Client (browser)?

I had two loops (one nested in the other one) and I was wondering if there is any difference in how… Read more Two Loops Performance Difference. Swapping Inner And Outer Loop

I have recently created a Google Map using V3 of the API (latest version). One of my requirements … Read more Google Maps V3 Rendering Over 1 Million Markers (in A Reasonable Time)

I have this piece of Javascript code, which takes about 600 ms on every call in Internet Explorer. … Read more Why Is This Piece Of Javascript Code So Slow?

I need to develop an ASP.NET web application ( not MVC ) which shows charts which are generated usi… Read more Fastest Javascript Charting Library For Really Huge Data

Been working on an App and since it's getting a bit too big I've thinking of ways to improv… Read more Is $.empty() Enough For Big Ajaxy Apps?

Find length of line 300* slower First of I have read the answer to Why is my WebAssembly function s… Read more Why Is Webassembly Function Almost 300 Time Slower Than Same Js Function

We have huge rendering spikes with ng-repeat in Angular application. Main page shows a huge list of… Read more Angular Ng-repeat Cache (avoid Re-rendering On State Change)

Context I have spent some hours playing with Electron and I have observed that it consistently take… Read more Dealing With Slow Electron Startup

Given this article: http://richardartoul.github.io/jekyll/update/2015/04/26/hidden-classes.html If … Read more Hidden Classes And Equivalence Between {} Object Vs. Custom Constructor (v8)

I'm trying to measure page load performance of real website users. To make better sense of the… Read more Get Transferred Size Of A Resource Using Javascript

I'm reading through the Backbone.js source and am confused by this var triggerEvents = function… Read more Backbone Triggerevents Variable

Is it possible to create the the data1 array without using nested for loops? // My starting Nor… Read more Efficient Way To Create Javascript Object From Array Of Properties And Array Of Matching Property Values

Since Javascript performance can possibly get intensive on large input forms, what is the cleanest … Read more Fastest (javascript/jquery) Way To Track Changes In A Large Input Form

Which should be faster conceptually speaking? String.charAt(0) or /^.{1}/ (regex) Solution 1: Stri… Read more Performance - String.charat(0) Vs. /^.{1}/

I need to measure the performance overhead of additional Javascript event bindings (using jQuery li… Read more Measure Cpu Load Of Javascript Applications

I'm starting to play around with Boomerang for measuring performance. It's very promising. … Read more Read Size Of Current Document From Javascript

I have two pieces of code below Snippet#1 const doubleWidth = (element) => { const width = ele… Read more Checking Width And Setting Width Inside Foreach Loop Performance

A ajax code that i am using to request a page is consuming too much memory and is making the browse… Read more Ajax Too Slow - Recursion