Base on my Experience

When I am currently in my job I encounter a theme that they are using is called WP Rig. This is awesome, because all the code here are optimised and clean code. All the JS and css are automatically minified and also images are automatically converted to a lazy load features. This all functionality help your wordpress website to run faster and light weight.

What is the WP Rig?

WP Rig is a modern WordPress starter theme and build process bundled into one convenient package. It helps you create beautiful, lightning-fast WordPress themes with exciting user experiences that meet the latest web standards.

You write modern PHP, CSS, and JavaScript, WP Rig lints, optimizes, and minifies your code to make the theme–and the site it runs on–as performant as possible.

Features

We created WP Rig to help you do what you do best: build feature-rich and visually stunning WordPress themes for every person who uses the web. Out of the box you get a fully styled starter theme built for performance and maintainability.

More Than a Starter Theme

WP Rig is a modern build process and starter theme bundled into one convenient package.

The starter theme gives you a starting point for your designs and layouts; minimal templates with optional drag-and-drop files from the WordPress Template Hierarchy; code and file structure optimized for modern performance standards (including lazy-loading images); and well documented helper functions to make theme development and customization easy.

The build process provides a no-configuration starting point for modern progressive WordPress theme development. The process works with the bundled starter theme or any other theme you want to use. Start the process by invoking the npm run build command and work in the /dev/ folder. The WP Rig Gulp process manages and optimizes every file, boots up BrowserSync for immediate in-browser previews, parses your modern JavaScript (ES2015) and CSS through BabelPostCSS, and postcss-preset-env (formerly cssnext), and keeps tabs on your code quality via WordPress Coding Standards and ESLint.

All of this, coupled with tight VS Code integration, takes the guesswork out of developing modern, progressive WordPress themes.

Visit There Website

More info visit WP Rig and you will learn how this change your website to run faster like a wind :). I will planning to create a video tutorial here if I have a time to introduce what is WP Rig and how this will run faster. I am planning to switch Avada theme to WP Rig and see how will this improve my website loading speed. I will compare it before and after result.