The Cost of Javascript Frameworks - Web Performance Consulting | TimKadlec.com
There is no faster (pun intended) way to slow down a site than to use a bunch of JavaScript. The thing about JavaScript is you end up paying a performance tax no less than four times: The cost of downloading the file on the network The cost of parsing and compiling the uncompressed file once downloaded The cost of executing the JavaScript The memory cost The combination is very expensive. And we a
requestAnimationFrame Scheduling For Nerds
A few people were curious about the scheduling of requestAnimationFrame callbacks, so here’s the tl;dr: All rAF callbacks always run in the same or next frame of workAny rAFs queued in your event handlers will be executed in the same frame. Any rAFs queued in a rAF will be executed in the next frame. (Same for any queued within IntersectionObserver or ResizeObserver callbacks.) All rAFs that ar
Complexities of an infinite scroller | Blog | Chrome for Developers
TL;DR: Re-use your DOM elements and remove the ones that are far away from the viewport. Use placeholders to account for delayed data. Here’s a demo and the code for the infinite scroller. Infinite scrollers pop up all over the internet. Google Music’s artist list is one, Facebook’s timeline is one and Twitter’s live feed is one as well. You scroll down and before you reach the bottom, new content
snabbt.js
Introduction snabbt.js is a minimalistic javascript animation library. It focuses on moving things around. It will translate, rotate, scale, skew and resize your elements. By including matrix multiplication operations, transforms can be combined in any way you want. The end result is then set via CSS3 transform matrices. snabbt.js is built to be fast. It will only animate things that modern browse
(･ω･) もきゅ？（・ω・）もきゅ字ジャンプ
（・ω・）こばわ パフォーマンスに関する有力情報を見つけました 「be-style」様 [Unity] StaticsとProfilerでパフォーマンスを確認する （・ω・）ノ じゃーん ・・・ ＞Draw Calls = 20以下 ＞Tris(三角ポリゴン数) = 7.5K以下 （・ω・）ｷﾋﾞｼｨな・・・ （・ω・）情報ありがとうございます あと、もきゅ調べによると「Verts」 （たぶんバーテックス：頂点のことだと思う） の値も小さくないといけないような気がします・・・ ちなみに今までのもの （キャラのアウトラインはポリゴンで作っていました） 試しにキャラのアウトラインポリゴンを消してみた ※ドローコールが増えているのは「うさむー（仮）」の位置とか 丸影の影響で、たまたまだと思います トライアングル 11.9k → 10.9k バーテックス 11.1k → 9.8k になり、処理落ち
Why We Dropped Zepto
Deep inside his icy cave, the wise and powerful Yeti heard people asking, "Where did Zepto go?" Back when Foundation 4 was being conceived we switched to Zepto (with a jQuery option) for its smaller file size and faster load time. But over time we found that lighter file size did not translate into better performance overall. Sure, Zepto downloaded quickly. But once loaded, it wasn't quite as fast
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