https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/avoid-excessive-dom-size/
Issues - PageSpeed : Optimize DOM Size | Screaming Frog
Oct 15, 2025 - Pages with a large DOM size with a large layout or style recalculation exceeding a duration of 40ms. A large DOM can increase the duration of style...
optimize dom sizeissuesfrog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/avoid-serving-legacy-javascript-to-modern-browsers/
Issues - PageSpeed : Legacy JavaScript | Screaming Frog
Oct 14, 2025 - Pages with legacy JavaScript. Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren’t necessary for modern...
javascript screaming frog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/serve-static-assets-with-an-efficient-cache-policy/
Issues - PageSpeed : Use Efficient Cache Lifetimes | Screaming Frog
Oct 15, 2025 - Pages with resources that are not cached. HTTP caching can speed up your page load time on repeat visits. When a browser requests a resource, the server...
use efficient cacheissuesfrog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/minimize-main-thread-work/
Issues - PageSpeed : Minimize Main-Thread Work | Screaming Frog
Oct 15, 2025 - Pages with average or slow execution timing on the main thread. The main thread of the renderer process typically handles most code that allows users to...
minimize main threadissues
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/remove-unused-javascript/
Issues - PageSpeed : Reduce Unused JavaScript | Screaming Frog
Oct 15, 2025 - Pages with unused JavaScript that are larger than necessary in bytes and reducing page speed.
issues pagespeed reduceunused
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/improve-image-delivery/
Issues - PageSpeed : Improve Image Delivery | Screaming Frog
Pages where the download time of images can be reduced, improving the perceived load time of the page and Largest Contentful Paint (LCP). This audit is a...
issues pagespeedimprove image
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/eliminate-render-blocking-resources/
Issues - PageSpeed : Render Blocking Requests | Screaming Frog
Oct 15, 2025 - Pages with resources that are blocking the first paint of the page. Lighthouse flags pages which have scripts that do not have defer or async attributes, and...
render blocking requestsfrog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/minify-javascript/
Issues - PageSpeed : Minify JavaScript | Screaming Frog
Oct 15, 2025 - Pages with unminified JavaScript files that are larger than necessary in bytes and reducing page speed.
issues pagespeed minifyfrog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/avoid-large-layout-shifts/
Issues - PageSpeed : Layout Shift Culprits | Screaming Frog
Oct 17, 2025 - Pages that have layout shifts on DOM elements without any user interaction such as elements being added, removed, or their fonts changing as the page loads....
layout shift culpritsissues
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https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/ensure-text-remains-visible-during-webfont-load/
Issues - PageSpeed : Font Display | Screaming Frog
Oct 15, 2025 - Pages with fonts that may flash or become invisible during page load, which can be annoying to users and reduce the visual appearance of page load speed.
issues pagespeedfont display
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/remove-unused-css/
Issues - PageSpeed : Reduce Unused CSS | Screaming Frog
Oct 15, 2025 - Pages with unused CSS that are larger than necessary in bytes and reducing page speed.
issues pagespeed reduceunused
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/network-dependency-tree/
Issues - PageSpeed : Network Dependency Tree | Screaming Frog
Pages with a lot of latency on the critical path, caused by long chains and large resource download sizes. Additionally, pages with key requests that aren’t...
issues pagespeednetworktree
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/document-request-latency/
Issues - PageSpeed : Document Request Latency | Screaming Frog
Pages with resources that redirect, have a slow server response, or do not apply text compression. These can all contribute to latency and reducing page speed....
document request latencyfrog
https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/minify-css/
Issues - PageSpeed : Minify CSS | Screaming Frog
Oct 15, 2025 - Pages with unminified CSS files that are larger than necessary in bytes and reducing page speed.
issues pagespeed minifycss
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https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/
Issues - PageSpeed | Screaming Frog
Page speed is a fundamental component of UX and by integrating the PageSpeed Insights API into a crawl, speed metrics, opportunities and diagnostics can be...
issues pagespeedscreamingfrog
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https://www.screamingfrog.co.uk/seo-spider/issues/pagespeed/reduce-javascript-execution-time/
Issues - PageSpeed : Reduce JavaScript Execution Time | Screaming Frog
Oct 15, 2025 - Pages with average or slow JavaScript execution time (over 2 seconds). When JavaScript takes a long time to execute, it slows down page performance.
issues pagespeed reducetime