JavaScript Creator

I measure execution time like this: function testFn() { return true; } console.time(… Read more Why Does The Execution Time Vary?

The difference between these two keywords in terms of scoping has already been thoroughly discussed… Read more Is There A Performance Difference Between 'let' And 'var' In Javascript

When using a table with a reasonable amount of data - 100 rows by 50 columns - I notice that IE8 pe… Read more Poor Performance With Tables In Internet Explorer 8 Standards Mode

I have something like this ... .. . $('.Class1').so Solution 1: As far as fastest selec… Read more Jquery - More Efficient To Use Multiple Selectors, Or Each

I'd like to write a little library for JavaScript enums. For me to do that, I need to decide ho… Read more Is Javascript String Comparison Just As Fast As Number Comparison?

I tried Dart SDK after the 1.0 release, and wrote a simple hello-world program in Dart. Then, with … Read more Why The Converttofastobject Function Make It Fast?

For example, I need to calculate a Math.sqrt of my data for each attr, how can I calculate only one… Read more Getting A Better Performance On Repeatedly Method On D3

If you have a function which fires on a scroll event, which is better. Check if a class is already… Read more Which Is Performancewise Better, Check For Class Or Add Class

I'm a javascript beginner and I'm trying to improve my skills. I'm currently working on… Read more How To Know Which Part Of My Js Is Making It Laggy?

I know this topic has been debated in general several times already, but I am looking for a more te… Read more Why Is Jquery Selector Function So Slow Compared To Native Dom Methods

I have some browser-intensive CSS and animation in my webpage and I'd like to determine if the … Read more Website Performance Testing: How Best To Approximate Computer Performance?

In JavaScript, it is possible to declare multiple variables like this: var variable1 = 'Hello, … Read more Declaring Multiple Variables In Javascript

Some time ago I've seen somewhere a trick to perform modulo operation using bit operators. But … Read more Other Ways Of Performing Modulo Operation

I'm working on a web app in ASP.NET 2.0 that involves several GridView elements. When users cl… Read more Javascript Function "createcallback" Called >50 Times When I Use Addclass/removeclass In Firefox

I have a simple node.js server like: var app = require('express')(); var compression = requ… Read more Unexpected Behavior When Increasing Network Speed And Connecting To A Node.js Server

I am using Redux and React to build a web application. My application is an analytics application t… Read more Redux Performance With Large Objects

I recently saw this benchmark: http://jsperf.com/remove-element-splice-vs-move-and-pop I noticed th… Read more Why Is Array.splice() So Slow?

I'm working on a Vue/Vuetify app that has a performance problem. I've created a custom comp… Read more How Can I Repeatedly Access A Vue Prop Without Tanking Performance?

Running: bundle exec rake assets:precompile RAILS_ENV=production Takes about 6 minutes for 15 .js … Read more Poor Time Performance Of 'rake Assets:precompile'

IE11 has a well-documented iframe memory leak. In a SPA, if you are using iframes the memory will g… Read more Detect When Ie11, With Its Built-in Memory Leak, Runs Out Of Memory (1.5gb Recyclable Pool)