- Advocate for bumping the minimum PHP version: recent PHP versions are faster & lighter, so less CPU cycles and less energy consumption
- PHP: Write more efficient code (for example use caches instead of repetative nested loops)
- Advocate for vanilla JS vs jQuery: Faster client-side and fewer assets to download
- Advocate for service-workers in core
- Find a way to remove the emojis script, or at least only load it when needed. It's 14kb on each page-load on 40% of the web, it's insane!
- Advocate for more efficient styles
- Advocate for CSS over JS where possible
- Rethink inline styles for small assets
- Advocate dropping IE11 support. Supporting IE11 adds lots of styles and JS and prevents us from following more modern practices.
- Advocate for modern CSS: grid vs flexbox, css-variables
- Advocate for properly sized images
- Advocate for SVG over jpg/png etc
- Prefer system fonts over webfonts. If webfonts are necessary prefer local fonts over webfonts
- Prefer dark color schemes over light