{"id":7055,"date":"2026-07-22T09:00:00","date_gmt":"2026-07-22T07:00:00","guid":{"rendered":"https:\/\/taismo.de\/unkategorisiert\/pagespeed-2\/"},"modified":"2026-07-27T23:14:00","modified_gmt":"2026-07-27T21:14:00","slug":"pagespeed","status":"publish","type":"post","link":"https:\/\/taismo.de\/en\/what-is\/pagespeed\/","title":{"rendered":"PageSpeed"},"content":{"rendered":"<style>\n.taismo-art{display:grid;grid-template-columns:320px minmax(0,1fr);gap:36px;align-items:start}\n.taismo-art .toc-sticky{position:sticky;top:80px}\n.taismo-art .toc-sticky ol li{margin-bottom:9px}\n.taismo-art .toc-sticky ol a:hover{color:var(--toc-hover) !important}\n.taismo-art .taismo-main h2{scroll-margin-top:90px;margin-top:38px}\n.taismo-art .lead-def{font-size:1.15em;line-height:1.6;background:#f7f2ec;border-left:4px solid #ED8924;padding:16px 20px;border-radius:8px}\n.taismo-art table{border-collapse:collapse;width:100%;margin:18px 0}\n.taismo-art th,.taismo-art td{border:1px solid 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<\/g> <\/svg><\/div>\n<h3 style=\"text-align:center;color:#fff;margin:0 0 14px;font-size:1.1em\">Contents<\/h3>\n<ol style=\"margin:0;padding-left:1.2em;line-height:1.5;font-weight:600;color:#fff;font-size:0.9em\">\n<li><a href=\"#page-speed-at-a-glance\" style=\"color:#fff;text-decoration:none\">Page speed at a glance<\/a><\/li>\n<li><a href=\"#how-page-speed-is-measured\" style=\"color:#fff;text-decoration:none\">How is PageSpeed measured?<\/a><\/li>\n<li><a href=\"#core-web-vitals-and-page-speed\" style=\"color:#fff;text-decoration:none\">What do Core Web Vitals have to do with PageSpeed?<\/a><\/li>\n<li><a href=\"#is-page-speed-a-ranking-factor\" style=\"color:#fff;text-decoration:none\">Is PageSpeed a ranking factor?<\/a><\/li>\n<li><a href=\"#how-to-improve-page-speed\" style=\"color:#fff;text-decoration:none\">How do you improve your PageSpeed?<\/a><\/li>\n<li><a href=\"#faq-pagespeed\" style=\"color:#fff;text-decoration:none\">Frequently asked questions about PageSpeed<\/a><\/li>\n<\/ol>\n<\/aside>\n<div class=\"taismo-main\">\n<h1 class=\"brand-claim\">What is PageSpeed?<\/h1>\n<p class=\"lead-def\"><strong>PageSpeed<\/strong> (also written page speed or site speed) is the loading speed of a web page, meaning how quickly its content becomes visible and usable in the browser. PageSpeed is measured through field data and lab data, above all with the <strong>Core Web Vitals<\/strong> and Google&#8217;s tool <strong>PageSpeed Insights<\/strong>. A high page speed improves the user experience and counts for Google as a confirmed ranking signal.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/taismo.de\/wp-content\/uploads\/2026\/07\/pagespeed-ladegeschwindigkeit-webseite.png\" width=\"1200\" height=\"675\" alt=\"PageSpeed explained: the loading speed of a web page shown as a speedometer, measured with Core Web Vitals and PageSpeed Insights\" title=\"PageSpeed: the loading speed of a web page\" loading=\"lazy\"><\/figure>\n<p>Page speed is not one single number but a bundle of metrics that describe when a page shows its first content, when it has finished loading and from which point a visitor can actually use it. For site owners the metric matters twice over: slow pages lose visitors, and Google counts speed as part of the page experience.<\/p>\n<h2 id=\"page-speed-at-a-glance\">Page speed at a glance<\/h2>\n<table>\n<tr>\n<th>Attribute<\/th>\n<th>Detail<\/th>\n<\/tr>\n<tr>\n<td>Term<\/td>\n<td>PageSpeed (also: page speed, site speed)<\/td>\n<\/tr>\n<tr>\n<td>Field<\/td>\n<td>web performance, technical SEO, page experience<\/td>\n<\/tr>\n<tr>\n<td>Synonyms<\/td>\n<td>loading speed, load time, site speed<\/td>\n<\/tr>\n<tr>\n<td>Measured with<\/td>\n<td>PageSpeed Insights, Lighthouse, Core Web Vitals, CrUX<\/td>\n<\/tr>\n<tr>\n<td>Kinds of data<\/td>\n<td>field data (real users) and lab data (standardized test)<\/td>\n<\/tr>\n<tr>\n<td>Related terms<\/td>\n<td>Core Web Vitals, Largest Contentful Paint, caching, CDN<\/td>\n<\/tr>\n<\/table>\n<h2 id=\"how-page-speed-is-measured\">How is PageSpeed measured?<\/h2>\n<p>PageSpeed is measured through two kinds of data: field data from real user visits and lab data from a standardized test environment. Both answer different questions and complement each other.<\/p>\n<ul>\n<li><strong>Field data (real user monitoring):<\/strong> it comes from real visitors and is collected through the <em>Chrome User Experience Report<\/em> (CrUX). Field data shows how fast a page really loads on the devices and connections people actually use.<\/li>\n<li><strong>Lab data:<\/strong> it is produced in a controlled environment with fixed device and network settings. Lab data is reproducible and ideal for debugging a concrete problem before a change goes live.<\/li>\n<\/ul>\n<p>The best known tool is <strong>Google PageSpeed Insights (PSI)<\/strong>. It brings both worlds together: it shows the field data from CrUX, where the URL has any, and adds a lab test carried out by <strong>Lighthouse<\/strong>. Lighthouse awards a performance score from 0 to 100 and lists concrete optimization hints. One caveat: that score is a snapshot of the lab test, while Google&#8217;s own assessment runs on the field data.<\/p>\n<figure><a href=\"https:\/\/taismo.de\/en\/what-is\/core-web-vitals\/\" title=\"Core Web Vitals\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 760 280\" role=\"img\" aria-labelledby=\"fig1t fig1d\" style=\"width:100%;height:auto;max-width:760px;font-family:Arial,Helvetica,sans-serif\"><title id=\"fig1t\">Field data and lab data compared<\/title><desc id=\"fig1d\">PageSpeed is measured in two ways: field data comes from real user visits through the Chrome User Experience Report, lab data from a standardized test with Lighthouse. PageSpeed Insights shows both together.<\/desc><rect x=\"0\" y=\"0\" width=\"760\" height=\"280\" fill=\"#ffffff\"\/><text x=\"380\" y=\"34\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"18\" font-weight=\"bold\">Two kinds of data, one goal<\/text><rect x=\"30\" y=\"60\" width=\"330\" height=\"170\" rx=\"14\" fill=\"#072328\"\/><text x=\"195\" y=\"98\" text-anchor=\"middle\" fill=\"#ffffff\" font-size=\"19\" font-weight=\"bold\">Field data<\/text><text x=\"55\" y=\"132\" fill=\"#B8C4C4\" font-size=\"14\">Real users, real devices<\/text><text x=\"55\" y=\"158\" fill=\"#B8C4C4\" font-size=\"14\">Source: Chrome UX Report (CrUX)<\/text><text x=\"55\" y=\"184\" fill=\"#ED8924\" font-size=\"14\" font-weight=\"bold\">Basis of Google&#8217;s assessment<\/text><text x=\"55\" y=\"210\" fill=\"#B8C4C4\" font-size=\"13\">Answers: how fast is it in reality?<\/text><rect x=\"400\" y=\"60\" width=\"330\" height=\"170\" rx=\"14\" fill=\"#ffffff\" stroke=\"#ED8924\" stroke-width=\"3\"\/><text x=\"565\" y=\"98\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"19\" font-weight=\"bold\">Lab data<\/text><text x=\"425\" y=\"132\" fill=\"#072328\" font-size=\"14\">Standardized test environment<\/text><text x=\"425\" y=\"158\" fill=\"#072328\" font-size=\"14\">Tool: Lighthouse score 0 to 100<\/text><text x=\"425\" y=\"184\" fill=\"#ED8924\" font-size=\"14\" font-weight=\"bold\">Ideal for debugging<\/text><text x=\"425\" y=\"210\" fill=\"#55605f\" font-size=\"13\">Answers: what is causing it?<\/text><text x=\"380\" y=\"262\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"13\">PageSpeed Insights shows both kinds of data for one URL together.<\/text><text x=\"676\" y=\"270\" fill=\"#072328\" font-size=\"11\" opacity=\"0.5\">Fig. 1 &#183; taismo<\/text><\/svg><\/a><figcaption><strong>Fig. 1: Field data (real users) and lab data (Lighthouse). PageSpeed Insights brings both together.<\/strong><\/figcaption><\/figure>\n<h2 id=\"core-web-vitals-and-page-speed\">What do Core Web Vitals have to do with PageSpeed?<\/h2>\n<p>The Core Web Vitals are the three metrics Google uses to put a number on page speed and user experience. They turn the vague word fast into measurable thresholds and form the basis of the page experience. The term <a href=\"https:\/\/taismo.de\/en\/what-is\/core-web-vitals\/\">Core Web Vitals<\/a> explains every single metric in detail.<\/p>\n<ul>\n<li><strong>Largest Contentful Paint (LCP):<\/strong> measures when the largest visible element has loaded, the loading side of speed. Good is up to 2.5 seconds. The term <a href=\"https:\/\/taismo.de\/en\/what-is\/largest-contentful-paint\/\">Largest Contentful Paint<\/a> goes into the detail.<\/li>\n<li><strong>Interaction to Next Paint (INP):<\/strong> measures how quickly the page reacts to input, the side of usability. Good is up to 200 milliseconds.<\/li>\n<li><strong>Cumulative Layout Shift (CLS):<\/strong> measures how much content jumps around while the page loads, the visual stability. Good is a value below 0.1.<\/li>\n<\/ul>\n<p>PageSpeed is therefore the umbrella term, the Core Web Vitals are the concrete yardstick. Anyone who wants to improve loading speed works in practice on exactly these three values.<\/p>\n<h2 id=\"is-page-speed-a-ranking-factor\">Is PageSpeed a ranking factor?<\/h2>\n<p>Yes, PageSpeed is a confirmed ranking factor, but a comparatively weak one. Google officially made loading speed a ranking signal in 2010 for desktop search and in 2018 for mobile search; since 2021 it feeds into the assessment through the page experience signal and the Core Web Vitals.<\/p>\n<p>What matters is the right perspective: relevance and content quality weigh far more heavily than speed. PageSpeed works above all as a tiebreaker, because between two pages of equal content the faster one comes out ahead. The bigger lever is indirect anyway: fast pages lower the bounce rate and raise time on page and conversions. Problems with the Core Web Vitals show up in the <a href=\"https:\/\/taismo.de\/en\/what-is\/google-search-console\/\">Google Search Console<\/a> report, which collects the field data for your domain in one place.<\/p>\n<h2 id=\"how-to-improve-page-speed\">How do you improve your PageSpeed?<\/h2>\n<p>You improve page speed by cutting the amount of data you transfer, reducing requests to the server and delivering content closer to the user. The most effective levers fall into four areas.<\/p>\n<ol>\n<li><strong>Optimize images:<\/strong> modern formats such as WebP or AVIF, sensible image dimensions and <a href=\"https:\/\/taismo.de\/en\/what-is\/lazy-loading\/\">lazy loading<\/a> for images outside the visible area. On most pages images are the largest single data item.<\/li>\n<li><strong>Use caching:<\/strong> a <a href=\"https:\/\/taismo.de\/en\/what-is\/cache\/\">cache<\/a> stores a page once it has been generated, so the server does not have to build it again on every request. That noticeably lowers the server response time.<\/li>\n<li><strong>Speed up delivery:<\/strong> a <a href=\"https:\/\/taismo.de\/en\/what-is\/content-delivery-network-cdn\/\">content delivery network<\/a> (CDN) serves content from a geographically nearby server and shortens the transfer routes.<\/li>\n<li><strong>Compress files:<\/strong> text based resources such as HTML, CSS and JavaScript can be transferred in compressed form with <a href=\"https:\/\/taismo.de\/en\/what-is\/gzip\/\">gzip<\/a> or the more efficient <a href=\"https:\/\/taismo.de\/en\/what-is\/brotli\/\">Brotli<\/a>. On top of that, minifying code and deferring non critical scripts help.<\/li>\n<\/ol>\n<figure><a href=\"https:\/\/taismo.de\/en\/seo-audit\/\" title=\"SEO audit\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 760 300\" role=\"img\" aria-labelledby=\"fig2t fig2d\" style=\"width:100%;height:auto;max-width:760px;font-family:Arial,Helvetica,sans-serif\"><title id=\"fig2t\">The four most important levers for better PageSpeed<\/title><desc id=\"fig2d\">PageSpeed can be improved through four levers: optimize images, use caching, put a content delivery network in front and compress files with gzip or Brotli.<\/desc><rect x=\"0\" y=\"0\" width=\"760\" height=\"300\" fill=\"#ffffff\"\/><text x=\"380\" y=\"36\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"18\" font-weight=\"bold\">4 levers for faster load times<\/text><rect x=\"30\" y=\"66\" width=\"345\" height=\"98\" rx=\"12\" fill=\"#072328\"\/><circle cx=\"72\" cy=\"115\" r=\"22\" fill=\"#ED8924\"\/><text x=\"72\" y=\"123\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"20\" font-weight=\"bold\">1<\/text><text x=\"108\" y=\"106\" fill=\"#ffffff\" font-size=\"17\" font-weight=\"bold\">Optimize images<\/text><text x=\"108\" y=\"132\" fill=\"#B8C4C4\" font-size=\"13\">WebP\/AVIF, sizes, lazy loading<\/text><rect x=\"385\" y=\"66\" width=\"345\" height=\"98\" rx=\"12\" fill=\"#ffffff\" stroke=\"#ED8924\" stroke-width=\"3\"\/><circle cx=\"427\" cy=\"115\" r=\"22\" fill=\"#ED8924\"\/><text x=\"427\" y=\"123\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"20\" font-weight=\"bold\">2<\/text><text x=\"463\" y=\"106\" fill=\"#072328\" font-size=\"17\" font-weight=\"bold\">Use caching<\/text><text x=\"463\" y=\"132\" fill=\"#55605f\" font-size=\"13\">Cut the server response time<\/text><rect x=\"30\" y=\"176\" width=\"345\" height=\"98\" rx=\"12\" fill=\"#ffffff\" stroke=\"#ED8924\" stroke-width=\"3\"\/><circle cx=\"72\" cy=\"225\" r=\"22\" fill=\"#ED8924\"\/><text x=\"72\" y=\"233\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"20\" font-weight=\"bold\">3<\/text><text x=\"108\" y=\"216\" fill=\"#072328\" font-size=\"17\" font-weight=\"bold\">Use a CDN<\/text><text x=\"108\" y=\"242\" fill=\"#55605f\" font-size=\"13\">Short routes to the user<\/text><rect x=\"385\" y=\"176\" width=\"345\" height=\"98\" rx=\"12\" fill=\"#072328\"\/><circle cx=\"427\" cy=\"225\" r=\"22\" fill=\"#ED8924\"\/><text x=\"427\" y=\"233\" text-anchor=\"middle\" fill=\"#072328\" font-size=\"20\" font-weight=\"bold\">4<\/text><text x=\"463\" y=\"216\" fill=\"#ffffff\" font-size=\"17\" font-weight=\"bold\">Compress files<\/text><text x=\"463\" y=\"242\" fill=\"#B8C4C4\" font-size=\"13\">gzip \/ Brotli, minify code<\/text><text x=\"676\" y=\"292\" fill=\"#072328\" font-size=\"11\" opacity=\"0.5\">Fig. 2 &#183; taismo<\/text><\/svg><\/a><figcaption><strong>Fig. 2: The four most important levers for better PageSpeed, from image optimization through to compression.<\/strong><\/figcaption><\/figure>\n<p>Which levers pay off most is a question the measurement answers: the lab test points you to the biggest brakes, the field data shows the real effect. A structured look at load times and Core Web Vitals is a fixed part of an <a href=\"https:\/\/taismo.de\/en\/seo-audit\/\">SEO audit<\/a>, and in a relaunch we set the course for performance right in the <a href=\"https:\/\/taismo.de\/en\/webdesign\/\">web design<\/a>. More terms around speed and page experience are collected in the <a href=\"https:\/\/taismo.de\/en\/what-is\/\">SEO glossary<\/a>.<\/p>\n<h2 id=\"faq-pagespeed\">Frequently asked questions about PageSpeed<\/h2>\n<p><strong>What is a good PageSpeed score?<\/strong><br \/>A Lighthouse performance score of 90 and above counts as good, from 50 upwards as in need of improvement. More important than the lab value is the field data: all three Core Web Vitals should sit in the green range.<\/p>\n<p><strong>What is the difference between PageSpeed and Core Web Vitals?<\/strong><br \/>PageSpeed is the umbrella term for the loading speed of a page. The Core Web Vitals are the three concrete metrics Google uses to measure that speed and the user experience.<\/p>\n<p><strong>Is PageSpeed Insights free?<\/strong><br \/>Yes, PageSpeed Insights is a free Google tool. You enter a URL and get field data and lab data together with concrete optimization hints.<\/p>\n<p><strong>Why is my score worse on mobile than on desktop?<\/strong><br \/>Mobile tests simulate weaker processors and slower mobile connections. Since Google evaluates mobile first, that is the value that decides.<\/p>\n<\/p><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>IKI Contents Page speed at a glance How is PageSpeed measured? What do Core Web Vitals have to do with PageSpeed? Is PageSpeed a ranking factor? How do you improve your PageSpeed? Frequently asked questions about PageSpeed What is PageSpeed? PageSpeed (also written page speed or site speed) is the loading speed of a web [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":7544,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_taismo_jsonld":"","taismo_jsonld":"{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#webpage\",\"url\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/\",\"name\":\"What is PageSpeed?\",\"isPartOf\":{\"@id\":\"https:\/\/taismo.de\/#website\"},\"inLanguage\":\"en\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#primaryimage\"},\"mainEntity\":{\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#definedterm\"},\"breadcrumb\":{\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#breadcrumb\"},\"datePublished\":\"2026-07-22T09:00:00+02:00\",\"dateModified\":\"2026-07-26T01:55:26+02:00\",\"speakable\":{\"@type\":\"SpeakableSpecification\",\"cssSelector\":[\".brand-claim\",\".lead-def\"]},\"author\":{\"@id\":\"https:\/\/taismo.de\/#person-dominik-breitbach\"},\"publisher\":{\"@id\":\"https:\/\/taismo.de\/#organization\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#primaryimage\",\"contentUrl\":\"https:\/\/taismo.de\/wp-content\/uploads\/2026\/07\/pagespeed-ladegeschwindigkeit-webseite.png\",\"url\":\"https:\/\/taismo.de\/wp-content\/uploads\/2026\/07\/pagespeed-ladegeschwindigkeit-webseite.png\",\"width\":1200,\"height\":675,\"caption\":\"PageSpeed: the loading speed of a web page, measured with Core Web Vitals and PageSpeed Insights\"},{\"@type\":\"DefinedTerm\",\"@id\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/#definedterm\",\"name\":\"PageSpeed\",\"termCode\":\"pagespeed\",\"url\":\"https:\/\/taismo.de\/en\/what-is\/pagespeed\/\",\"inLanguage\":\"en\",\"inDefinedTermSet\":{\"@id\":\"https:\/\/taismo.de\/#seo-wiki\"},\"description\":\"PageSpeed is the loading speed of a web page, meaning how quickly its content becomes visible and usable in the browser. 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