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How To Boost Resource Loading With The New Priority Hint `fetchpriority`

Smashing Magazine

Of all those options, it’s safe to assume that text is the best choice for LCP performance because it loads and renders fast. web.dev’s main content is an image according to LCP (test ran on WebPageTest). Browsers follow a critical render path to parse the HTML document and its referenced resources (CSS, JS, images, etc.)

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Improving JavaScript Bundle Performance With Code-Splitting

Smashing Magazine

In this article, we’re going to cover code-splitting best practices and showcase some examples using React, so we load the minimum JavaScript necessary to render a page and dynamically load sizeable non-critical bundles. Website performance is not consistent across devices. Large preview ).

Code 89
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Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]

Smashing Magazine

Luckily, there are many great options that help you automate the collection of data and measure how your website performs over time according to these metrics. Depending on the network connection, performance budgets should adapt , but payload on slower connection is much more "expensive", regardless of how they’re used.

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Front-End Performance Checklist 2020 [PDF, Apple Pages, MS Word]

Smashing Magazine

Luckily, there are many great options that help you automate the collection of data and measure how your website performs over time according to these metrics. From Fast By Default: Modern loading best practices by Addy Osmani (Slide 19). AMP is not what makes the biggest difference from a performance perspective.".