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Lighthouse Desktop

· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

41

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
b.cdnst.net/javascript/speedtest-main.js?v=740e4726565b535af6c9481d7ff91b6a86400.0 s1.5 MiB
cdn.ziffstatic.com/pg/speedtest.prebid.js2050.0 s232.1 KiB
www.speedtest.net/s/fonts/Montserrat-Italic-VariableFont_wght-hint-all.woff260.0 s120.0 KiB
www.speedtest.net/s/fonts/Montserrat-VariableFont_wght-hint-all.woff260.0 s116.1 KiB
openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js0.0 ms89.9 KiB
cdn.static.zdbb.net/eu/js/z0WVjCBSEeGLoxIxOQVEwQ.min.js86400.0 s175.1 KiB
client.aps.amazon-adsystem.com/publisher.js3600.0 s82.5 KiB
b.cdnst.net/images/gauge-gradient-dl-multi-web.png86400.0 s76.8 KiB
b.cdnst.net/images/gauge-gradient-ul-multi-web.png86400.0 s72.7 KiB
www.speedtest.net/s/fonts/Montserrat-VariableFont_wght-kern-latin.woff260.0 s28.5 KiB
cdn.ziffstatic.com/pg/speedtest.js2581.0 s33.5 KiB
b.cdnst.net/images/gauge-gradient-ul-single-web.png86400.0 s63.9 KiB
cdn.ziffstatic.com/jst/zdconsent_eu.js605.0 s27.8 KiB
b.cdnst.net/images/gauge-gradient-dl-single-web.png86400.0 s61.0 KiB
cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js534454.0 s126.2 KiB
b.cdnst.net/styles/main.c94cd88435f3e907a9963e080e58198b.css86400.0 s29.1 KiB
www.speedtest.net/images/android-app-promo-1x.png86400.0 s29.0 KiB
appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js86400.0 s17.4 KiB
www.speedtest.net/s/fonts/gaugemono-regular-webfont.woff260.0 s4.3 KiB
b.cdnst.net/images/icg_how_much_speed.png86400.0 s10.7 KiB
b.cdnst.net/images/ad-free-125x101-fade-anim-1x.gif86400.0 s9.7 KiB
sb.scorecardresearch.com/beacon.js86400.0 s6.7 KiB
cdn.ziffstatic.com/jst/otTCF.202512.1.0.js534455.0 s17.7 KiB
www.speedtest.net/images/Download_on_the_Mac_App_Store_Badge_US-UK_165x40.svg86400.0 s5.1 KiB
config.aps.amazon-adsystem.com/configs/33363600.0 s2.1 KiB
b.cdnst.net/images/icg_desktop_apps.svg86400.0 s3.3 KiB
b.cdnst.net/images/dd-logo.svg86400.0 s2.5 KiB
cdn.ziffstatic.com/pg/speedtest.css2576.0 s1.2 KiB
b.cdnst.net/images/mobile_apps.svg86400.0 s2.2 KiB
b.cdnst.net/images/icg_talk_to_isp.svg86400.0 s1.9 KiB
b.cdnst.net/images/icg_check_outages.svg86400.0 s1.8 KiB
b.cdnst.net/images/icg_troubleshoot_wifi.svg86400.0 s1.3 KiB
b.cdnst.net/images/icg_get_help.svg86400.0 s1.1 KiB
b.cdnst.net/images/icg_qr_code.svg86400.0 s1.0 KiB
cdn.ziffstatic.com/ajs?zoneid=a3600.0 s298 B
b.cdnst.net/javascript/ads/ad.js86400.0 s237 B

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
www.speedtest.net/s/fonts/Montserrat-VariableFont_wght-hint-all.woff265 ms
www.speedtest.net/s/fonts/Montserrat-Italic-VariableFont_wght-hint-all.woff255 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:13.015 source:map[column:224 line:158 type:source-location url:https://cdn.ziffstatic.com/pg/speedtest.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:13.015 source:map[column:85 line:152 type:source-location url:https://cdn.ziffstatic.com/pg/speedtest.js urlProvider:network]] map[reflowTime:19.835 source:map[type:text value:[unattributed]]] map[reflowTime:1.211 source:map[column:132 line:76 type:source-location url:https://cdn.ziffstatic.com/pg/speedtest.js urlProvider:network]] map[reflowTime:0.519 source:map[column:447 line:107 type:source-location url:https://cdn.ziffstatic.com/jst/zdconsent.js urlProvider:network]]]

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
b.cdnst.net/javascript/ads/ad.js237 B
b.cdnst.net/styles/main.c94cd88435f3e907a9963e080e58198b.css29.1 KiB258 ms

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Speed requirement div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_how_much_speed.png10.6 KiB9.0 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 203 ms
URLTime Spent
speedtest.net/203 ms
www.speedtest.net/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.1 s 1.6 MiB
URLTransfer SizeEst Savings
b.cdnst.net/javascript/speedtest-main.js?v=740e4726565b535af6c9481d7ff91b6a1.5 MiB920.4 KiB
cdn.ziffstatic.com/pg/speedtest.prebid.js199.9 KiB161.6 KiB
/pagead/managed/js/gpt/m202604130101/pubads_impl.js187.5 KiB129.4 KiB
accounts.google.com/gsi/client?hl=en95.3 KiB79.5 KiB
cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js126.2 KiB71.9 KiB
www.googletagmanager.com/gtag/destination?id=G-KKLSRK6J1Z&cx=c&gtm=4e64f0168.6 KiB66.4 KiB
openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js89.5 KiB61.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-K7SNBZ138.7 KiB56.9 KiB
client.aps.amazon-adsystem.com/publisher.js82.1 KiB49.0 KiB
cdn.static.zdbb.net/js/z0WVjCBSEeGLoxIxOQVEwQ.min.js174.7 KiB41.9 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
b.cdnst.net/javascript/speedtest-main.js?v=740e4726565b535af6c9481d7ff91b6a1.4 s1.0 s279 ms
Unattributable338 ms27 ms0.0 ms
cdn.ziffstatic.com/jst/otTCF.202512.1.0.js309 ms285 ms2.7 ms
www.googletagmanager.com/gtag/destination?id=G-KKLSRK6J1Z&cx=c&gtm=4e64f0143 ms117 ms24 ms
www.googletagmanager.com/gtm.js?id=GTM-K7SNBZ142 ms115 ms24 ms
/pagead/managed/js/gpt/m202604130101/pubads_impl.js142 ms111 ms24 ms
cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js141 ms105 ms22 ms
www.speedtest.net/103 ms11 ms4.2 ms
cdn.ziffstatic.com/pg/speedtest.prebid.js94 ms60 ms33 ms
client.aps.amazon-adsystem.com/publisher.js93 ms77 ms14 ms
cdn.ziffstatic.com/jst/zdconsent.js87 ms75 ms4.6 ms
cdn.ziffstatic.com/pg/speedtest.js73 ms38 ms11 ms
openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js71 ms50 ms21 ms
cdn.static.zdbb.net/js/z0WVjCBSEeGLoxIxOQVEwQ.min.js61 ms37 ms7.8 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation2.2 s
Script Parsing & Compilation496 ms
Other385 ms
Style & Layout89 ms
Garbage Collection81 ms
Parse HTML & CSS63 ms
Rendering24 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
b.cdnst.net/javascript/speedtest-main.js?v=740e4726565b535af6c9481d7ff91b6a1.5 MiB
cdn.ziffstatic.com/pg/speedtest.prebid.js232.1 KiB
/pagead/managed/js/gpt/m202604130101/pubads_impl.js187.6 KiB
cdn.static.zdbb.net/eu/js/z0WVjCBSEeGLoxIxOQVEwQ.min.js175.1 KiB
www.googletagmanager.com/gtag/destination?id=G-KKLSRK6J1Z&cx=c&gtm=4e64f0169.0 KiB
www.googletagmanager.com/gtm.js?id=GTM-K7SNBZ139.1 KiB
cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js126.2 KiB
www.speedtest.net/s/fonts/Montserrat-Italic-VariableFont_wght-hint-all.woff2120.0 KiB
www.speedtest.net/s/fonts/Montserrat-VariableFont_wght-hint-all.woff2116.1 KiB
accounts.google.com/gsi/client?hl=en96.0 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Speed requirement div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_how_much_speed.png
Desktop apps div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_desktop_apps.svg
QR code for downloading mobile app div.pure-u-1-3 > div.qr-and-text > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_qr_code.svg
Wi-Fi troubleshooting div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_troubleshoot_wifi.svg
Check outages div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_check_outages.svg
Talk to ISP div.pure-u-1-3 > a > div.homepage-lower-btn > img.homepage-lower-icon
b.cdnst.net/images/icg_talk_to_isp.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Reduce unused CSS
●User Timing marks and measures 13 user timings
●Avoid long main-thread tasks 12 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 90 ms
●Server Backend Latencies 250 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
96

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Speedtest div.nav > div.pure-g > div.pure-u-1 > a.masthead-logo
GO div.speedtest-view > div.speedtest-container > div.start-button > a.js-start-test
Multi div > div.test-modes-wrapper > div.toggle > a.test-mode
Single div > div.test-modes-wrapper > div.toggle > a.test-mode

These are opportunities to improve keyboard navigation in your application.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
GO div.speedtest-view > div.speedtest-container > div.start-button > a.js-start-test
Our Privacy Policy div#onetrust-group-container > div#onetrust-policy > div#onetrust-policy-text > a.ot-cookie-policy-link
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Image elements do not have `[alt]` attributes that are redundant text.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Identical links have the same purpose.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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