Parallelize Downloads Across Hostnames (Deprecated)
What is Hostname Parallelization?
Why is Hostname Parallelization Deprecated?
Lighthouse is an open-source tool that is used to run an audit against your web pages and provides scores and suggestions for improving page performance, accessibility, SEO, and more.
PageSpeed Insights is a tool created by Google that reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.