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Perfplanet calendar’s oldies but goodies

Thomas Steiner has a brilliant idea for this year's Perfplanet calendar edition: what if we revisit some of the best articles from the past.

"Best" is subjective but how about "still popular"? So here's a list of the most visited articles in the past year in reverse chronological order of publication.

Anything catches your fancy? Want to write an update for 2022? Please do, but check with the original author first to give them the right of first refusal.

2010

• PNG that works
• The truth about non-blocking JavaScript

2011

• CSS Selector Performance has changed! (For the better)

2012

• Progressive jpegs: a new best practice
• Using NGINX, PHP-FPM+APC and Varnish to make WordPress Websites fly
• Deciphering the Critical Rendering Path

2013

• React's diff algorithm
• Who's Afraid of the Big Bad Preloader?
• The Runtime Performance Checklist

2014

• MozJPEG 3.0
• Tips For Optimising SVG Delivery For The Web

2015

• Why aren't your Images using Chroma-Subsampling?

2016

• A Tale of Four Caches
• Prefer DEFER Over ASYNC
• Testing with Realistic Networking Conditions
• Loading web fonts asynchronously
• Speed Versus Speed to Market
• HTTP/2 Push: The details

2017

• Evolution of : Gif without the GIF
• 3 Tips for Faster Font Loading
• Tracking CPU with Long Tasks API
• SQIP – Vague Vectors for Performant Previews
• Progressive Image Loading using Intersection Observer and SQIP

2018

• Doing Differential Serving in 2019
• HTTP/2 Prioritization

2019

• The unseen performance costs of modern CSS-in-JS libraries in React apps
• JavaScript component-level CPU costs
• Self-hosting third-party resources: the good, the bad and the ugly
• Native Image Lazy Loading in Chrome Is Way Too Eager
• Reading a WebPageTest Waterfall Chart
• Performance Tips for Background Video

Latest edition, 2020, is too recent and therefore excluded, but if you're curious, this "No JS" one is the most popular and by an order of magnitude, no less.