PageSpeed Optimizations

PageSpeed Insights, or PSI, is another tool created by Google that reports on the performance of a page on both mobile and desktop devices, and similar to Lighthouse, provides suggestions on how that page may be improved. Although PSI may seem similar to Lighthouse, the main difference is that PSI is focused only on Chrome browser performance. Lighthouse is a more comprehensive tool compared to PSI. Learn more about the various PageSpeed recommendations to enhance your web pages and the user experience.

Avoid a Character Set in the Meta Tag
Avoid Bad Requests
Avoid CSS @import
Avoid CSS Expressions
Avoid document.write
Avoid Flash on Mobile Web Pages
Avoid Landing Page Redirects
Avoid Plugins
Combine External CSS
Combine External JavaScript
Combine Images using CSS Sprites
Defer Loading of JavaScript
Defer Parsing of JavaScript
Enable Compression
Enable Keep-Alive
Improve Server Response Time
Inline Small CSS
Inline Small JavaScript
Leverage Browser Caching
Leverage Proxy Caching
Make Landing Page Redirects Cacheable
Minify CSS
Minify HTML

Minify JavaScript
Minimize Cookie Size
Minimize DNS Lookups
Minimize Redirects
Minimize Request Size
Optimize Images
Optimize the Order of Styles and Scripts
Parallelize Downloads Across Hostnames
Prefer Asynchronous Resources
Put CSS in the Document Head
Remove Query Strings from Static Resources
Remove Unused CSS
Serve Resources from a Consistent URL
Serve Scaled Images
Serve Static Content from a Cookieless Domain
Specify a Cache Validator
Specify a Character Set Early
Specify a Vary: Accept-Encoding Header
Specify a Viewport for Mobile Browsers
Specify Image Dimensions
Use an Application Cache
Use Efficient CSS Selectors