Use case by JonLuca De Caro in which he optimised the page load speed of a static site. Before optimisation the site weighed 1MB (at 20 requests) with DOMContentLoaded at 3.74s. After optimisation the site weighed only 267kB (at 9 requests) with DOMContentLoaded at 197ms. 10x Performance Increases: Optimizing a Static Site →
A Frontend United I was lucky to see Harry Roberts give this talk on CSS and Performance. You can watch it to, as the recording has been published to YouTube Ahh… CSS and performance. Two of my favourite things! But how well do they play together? It depends… In this very matter-of-fact talk, we’ll be […]
Insightful post by the folks over at LogRocket on the rendering pipeline: If your site takes forever to load, chances are your users aren’t gonna wait for it to finish, even if there’s valuable content to be found there. Some studies have shown that up to 50% of users leave a page after 3 seconds […]
While researching a performance issue in a React Native app by doing a deep dive into the bridge, I stumbled upon this nice list of tips by jamsch. The list – which touches react-navigation, the types of lists one can use, etc. – was originally posted as a comment on a Github Issue, but deserves […]
Yesterday I spent all day on the React Native Bridge digging deep into what gets sent over. This talk by Rotem Mizrachi-Meidan nicely details why one would want to do that. Next to the basic MessageQueue.spy(), I also used the aforementioned rn-snoopy to get some aggregated stats. A write-up of this video is also available.
React Native’s Image component handles image caching like browsers for the most part. If the server is returning proper cache control headers for images you’ll generally get the sort of built in caching behavior you’d have in a browser. Even so many people have noticed: Flickering. Cache misses. Low performance loading from cache. Low performance […]
Back in 2015 Paul Lewis published a brilliant article named FLIP your animations, a technique to getting smooth animations on the web. FLIP stands for First, Last, Invert, Play First: before anything happens, record the current (i.e., first) position and dimensions of the element that will transition. You can use element.getBoundingClientRect() for this, as will […]