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PUBLIC MARKS with tag webperf

This year

Best practices for fonts

by srcmax
This article discusses performance best practices for fonts. There are a variety of ways in which web fonts impact performance: Delayed text rendering: If a web font has not loaded, browsers typically delay text rendering. In many situations, this delays First Contentful Paint (FCP). In some situations, this delays Largest Contentful Paint (LCP). Layout shifts: The practice of font swapping has the potential to cause layout shifts and so impact Cumulative Layout Shift (CLS). These layout shifts occur when a web font and its fallback font take up different amounts of space on the page.


GitHub - fasterize/HowSlow: A Service Worker that monitors network requests to estimate bandwidth and RTT

by srcmax
A Service Worker that monitors network requests to estimate bandwidth and RTT

JavaScript Optimization  |  Web Fundamentals  |  Google Developers

by dzc
Delivering less JavaScript can mean less time in network transmission, less spent decompressing code and less time parsing and compiling this JavaScript.



by dzc
a linting tool for the web: accessibility, speed, security, and more (best practices and common errors)

GTmetrix | Website Speed and Performance Optimization

by srcmax & 1 other
Analyze your site’s speed and make it faster.

You Don't Need the DOM Ready Event

by dzc & 1 other
It usually takes a long time for the DOM ready event to fire. During this time, many parts of a webpage are inactive as they wait for Javascript to kick in and initialize them. This delay is significant and makes a rich web application become available slower. Creates a bad user experience, doesn't adhere to any design pattern and is, really, not needed...


Lazy Loading Images? Don’t Rely On JavaScript! | Robin Osborne

by dzc & 1 other
Given the potential limitations, let’s work on a solution that can handle all my concerns: a. works without JavaScript (i.e., lazy loading is an enhancement) b. vanilla js – no dependencies on jquery or angularjs c. works with broken JavaScript (i.e., the browser supports JavaScript, but there’s a js error somewhere which causes your script to break; might not even be your fault!)

Front-end Guidelines Questionnaire: Writing consistent & cohesive code

by dzc & 1 other
A one-page questionnaire to help your team establish effective frontend guidelines, so that you can write consistent & cohesive code together.

High Performance Browser Networking (O'Reilly)

by dzc & 1 other
This book is required reading for anyone who cares about web performance; it's already established as the go-to reference on the topic. —Mark Nottingham (IETF HTTPBis Chair)


Why AMP is fast

by dzc
While this article is about optimizations in AMP, it might also be useful as a kind of todo list for optimizing a non-AMP website.



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