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Nalezeno "performance": 778

No, Absolutely Not

19.11.2019
I think the difference between a junior and senior front-end developer isn't in their understanding or familiarity with a particular tech stack, toolchain, or whether they can write flawless code. Instead, it all comes down to this: how they push back against bad ideas. What I've learned this year...

Oh, the Places JavaScript Will Go

19.11.2019
I tend to be pretty vocal about the problems client-side JavaScript cause from a performance perspective. We're shipping more JavaScript than ever to our user's devices and the result is increasingly brittle and resource-intensive experiences. It's... not great. But that doesn't mean I don't like...

Six Months Using Firebase Web Performance Monitoring

19.11.2019
I don't really think of Firebase as a performance monitoring tool (all I ever think about is auth and real-time data storage), but nevertheless, it totally has that feature. Justin Ribeiro... [A] tool to track what real users in the wild are experiencing with an easy setup? Yes, please. [...]...

Working with Fusebox and React

8.11.2019
If you are searching for an alternative bundler to webpack, you might want to take a look at FuseBox. It builds on what webpack offers — code-splitting, hot module reloading, dynamic imports, etc. — but code-splitting in FuseBox requires zero configuration by default (although webpack will offer...

Location, Privilege and Performant Websites

7.11.2019
Here’s a wonderful reminder from Stephanie Stimac about web performance. She writes about a recent experience of moving to an area with an unreliable network and how this caused problems for her as she tried to figure out what was happening during a power blackout: Assuming all of your customers...

A Look at JAMstack’s Speed, By the Numbers

1.11.2019
People say JAMstack sites are fast — let’s find out why by looking at real performance metrics! We’ll cover common metrics, like Time to First Byte (TTFB) among others, then compare data across a wide section of sites to see how different ways to slice those sites up compare. First, I’d like...

Why Are Accessible Websites so Hard to Build?

23.10.2019
I was chatting with some front-end folks the other day about why so many companies struggle at making accessible websites. Why are accessible websites so hard to build? We learn about HTML, we make sure things are semantic and — voila! @— we have an accessible website. During the course...

What I Like About Writing Styles with Svelte

23.10.2019
There’s been a lot of well-deserved hype around Svelte recently, with the project accumulating over 24,000 GitHub stars. Arguably the simplest JavaScript framework out there, Svelte was written by Rich Harris, the developer behind Rollup. There’s a lot to like about Svelte (performance, built-in...

How to Use JPEG 2000 (JP2) for a Faster Images on iPhone (Sponsored)

21.10.2019
Images Slow Down Websites Images slow down the page-loading performance of many websites. Audit tools like Google’s Lighthouse can quickly tell you how many seconds you can save by optimizing your images. When you are delivering to desktops or android devices running Chrome browser, a quick...

Workflow Considerations for Using an Image Management Service

16.10.2019
There are all these sites out there that want to help you with your images. They do things like optimize your images and help you serve them performantly. That's a very good thing. By any metric, images are a major slice of the resources on websites, and we're notoriously bad at optimizing them...

Ten-Ton Widgets

15.10.2019
At a recent conference talk (sorry, I forget which one), there was a quick example of poor web performance in the form of a third-party widget. The example showed a site that installed the widget in order add a "email us" button fixed to the bottom right of the viewport. Not even a live-chat widget...

Let’s Make a Fancy, but Uncomplicated Page Loader

15.10.2019
It’s pretty common to see a loading state on sites these days, particularly as progressive web apps and reactive sites are on the rise. It’s one way to improve "perceived" performance — that is, making it feel as though the site is loading faster than it actually is. There’s no shortage of ways...

WordPress Plugin Overload? Give Jetpack a Try!

15.10.2019
The WordPress ecosystem has a plentiful supply of plugins that offer everything from AMP to Zapier integration and so, so, so many other things in between. It's a significant contributor to what makes WordPress great because plugins can account for the needs of nearly any website. How many plugins...

Recipes for Performance Testing Single Page Applications in WebPageTest

10.10.2019
WebPageTest is an online tool and an Open Source project to help developers audit the performance of their websites. As a Web Performance Evangelist at Theodo, I use it every single day. I am constantly amazed at what it offers to the web development community at large and the web performance folks...

Images Are Not Static Content

10.10.2019
We constantly hear about the importance of keeping websites lean and fast. A fast-loading website makes users more satisfied, and satisfied users spend more time and money on your website. However, website optimization is a complex task, as there is not one silver bullet to fix all of the issues...

Preloading Pages Just Before They are Needed

27.9.2019
The typical journey for a person browsing a website: view a page, click a link, browser loads new page. That's assuming no funny business like a Single Page App, which still follows that journey, but the browser doesn't load a new page — the client fakes it for the sake of a snappier...

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