Hummingbird – Optimize Speed, Enable Cache, Minify CSS & Defer Critical JS
Hummingbird makes your website faster and optimizes site performance by adding new ways to boost Google PageSpeed Insights with fine-tuned controls over file compression, deferring CSS and JavaScript styles and scripts, minify for CSS and JS, Lazy Load integration, and world-class caching.
2.7.4 - Use with caution