Memory Management in JS Web Apps
July 14, 2013 Memory Management in JS Web Apps Memory management is a fairly crucial part to building JavaScript web applications, and just because the language has a garbage collector it doesn’t absolve you from all duties. Take your classic controller (or view in Backbone land). In its constructor it may bind to some model events, perhaps re-rendering itself when a record changes. You’ll need to
Memory management - JavaScript | MDN
JavaScript Tutorials Complete beginners JavaScript basics JavaScript first steps JavaScript building blocks Introducing JavaScript objects JavaScript Guide Introduction Grammar and types Control flow and error handling Loops and iteration Functions Expressions and operators Numbers and dates Text formatting Regular expressions Indexed collections Keyed collections Working with objects Using classe
Volocity.jsを使ってアニメーションのパフォーマンスを比較してみた - beijaflor
CSS vs. JS Animation: Which is Faster? CSS AnimationよりもJavascriptを使った方がパフォーマンスが出るよ、というこの記事を見たので実際に試してみた。 結論 アニメーションさせる時は、Velocity.jsを使いましょう デモ DEMO1 - 画面下からスクロールインしてくるモーダルウィンドウ DEMO2 - 120個の丸が一度に動く、シンプルなアニメーション [source code @ GitHub] 機能比較 ライブラリ 特徴 メリット jQuery(animate()) 標準で組み込まれているアニメーションライブラリ ライブラリの読み込み不要 Velocity.js 標準のanimate()と同じ文法で使える拡張ライブラリ スピード最適化された実装 Transit CSS Animationを制御するためのライブラリ 3d-
Base16
require "gem" string = "base16" symbol = :base16 fixnum = 0 float = 0.00 array = Array.new array = ['chris', 85] hash = {"test" => "test"} regexp = /[abc]/ # This is a comment class Person attr_accessor :name def initialize(attributes = {}) @name = attributes[:name] end def self.greet "hello" end end person1 = Person.new(:name => "Chris") print Person::greet, " ", person1.name, "\n" puts "another
JavaScript Event Delegation is Easier than You Think — SitePoint
If you’re into adding a little JavaScript interactivity to your web pages you may have heard of JavaScript event delegation and thought it was one of those convoluted design patterns only hardcore JavaScript programmers worry about. The truth is, if you already know how to add JavaScript event handlers, it’s a snap to implement. JavaScript events are the bedrock of all interactivity on web pages (
Using event capturing to improve Basecamp page load times
We’ve been busy tightening the nuts and bolts on the all-new Basecamp in the wake of last week’s launch. As part of the process, I decided to take a closer look at client-side page load performance. Shaving even a tenth of a second off of page load time can have a big impact on perceived performance, so it’s a worthwhile investment. Profiling the JavaScript page load event led to a surprising reve
Profiling CSS for fun and profit — Perfection Kills
I’ve been recently working on optimizing performance of a so-called one-page web app. The application was highly dynamic, interactive, and was heavily stuffed with new CSS3 goodness. I’m not talking just border-radius and gradients. It was a full stack of shadows, gradients, transforms, sprinkled with transitions, smooth half-transparent colors, clever pseudo-element -based CSS tricks, and experim
How to measure frontend performance with Grunt | 4waisenkinder
When you are a frontend developer, you are on the constant journey to find the right tool to measure the performance of your site. Sure, there are the Developer Tools of your choice, Google Pagespeed or webpagespeed.org available. And those tools are great (if you do not know them, you should definitely check them out), but for me it was always “just” nice to use these tools. They provide lots of
phantomas - PhantomJS based, modular web performance metrics generator
Maciej Brencz is a Software Engineer at Wikia. He specializes in Web Performance and building scalable websites, struggling to send as less bytes as possible. He spends a part of his free time on GitHub or enjoying another juicy bit of kæstur hákarl. Web performance is gaining interest in IT world since 2010. There are many tools that can help you in making and keeping your site fast. Google’s P
phantomasの話 - sqsq120 テクニカブログ
「phantomasという表示速度計測ツールがあるらしい」と先輩から聞いて入れてみた。 phantomas phantomasとは？ webテストツールのphantomjsの機能を使ったツールでサイトの表示スピードを細かく計測してくれるもの。 インストールして使いまする。 所感としては、 ・自分のMac環境ではnodejsとphantomjs、npmのインストールしなきゃだったので導入がめんどかった。 ・導入紹介の日本語サイトが今んとこ少ない(2013/11)ので、自力でガンバらんといかんかった。 ってなところ。 機能的には ・UA詐称できるのでスマホにも適用可 ・js省いた検証ができるので便利 なとこがよかった。 ただ、苦労してこっち入れるんなら、 Web Pagetest使った方がいいかなぁとも思う。 こんなところで。
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GitHub - junegunn/fzf: A command-line fuzzy finder
Stats for Bower - the best package manager for the web.
What is event bubbling and capturing?
Should all jquery events be bound to $(document)?
David Mandelin Velocity 2