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Guides
The key website performance metrics are Largest Contentful Paint (LCP), Interaction to Next Paint (INP), Cumulative Layout Shift…
Guides
Your website is usually slow because of one of ten common causes: slow hosting, no caching, large images,…
Guides
Website performance monitoring tools track how fast your site is over time, so you notice slowdowns before visitors…
Guides
The PageSpeed Insights API lets a script test a page the same way the PageSpeed Insights website does…
Guides
To run a Pingdom speed check, open the Pingdom website speed test, enter your page URL, choose a…
Guides
To run a GTmetrix speed test, go to gtmetrix.com, enter your page URL, start the test and open…
Guides
To use WebPageTest, go to webpagetest.org, enter your URL, choose a test location, device and connection, run the…
Guides
The best website optimization tools fall into four groups: speed testing tools, image optimizers, caching tools and a…
Guides
PageSpeed Insights and Lighthouse use the same engine, but they run in different places. PageSpeed Insights runs Lighthouse…
Guides
To use Google PageSpeed Insights, go to pagespeed.web.dev, enter your page URL, select Analyze and read the results…
