Lighthouse Desktop
· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.Detailed Report
Audit breakdown by category with detailed findings.
Performance
Insights
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
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
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Est Savings |
|---|---|
| fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 | 15 ms |
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
shreddit-aspect-ratio#t3_1t9193p-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute shreddit-aspect-ratio#t3_1t9193p-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute | /a-bill-gates-funded-mosquito-factory-in-medellín-colomb... | 93.8 KiB | 55.1 KiB |
shreddit-aspect-ratio#t3_1t8ryjd-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute shreddit-aspect-ratio#t3_1t8ryjd-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute | /whos-an-actor-you-supported-for-most-of-your-life-becaus... | 76.4 KiB | 25.3 KiB |
shreddit-aspect-ratio#t3_1t8ruy8-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute shreddit-aspect-ratio#t3_1t8ruy8-aspect-ratio > shreddit-media-lightbox-listener.nd:visible > div.media-lightbox-img > img.absolute | /airbnb-host-texted-us-that-because-we-gave-them-a-non-v0... | 74.6 KiB | 12.5 KiB |
1000022972 span.flex > rpl-hovercard > button.flex > img.object-contain | emoji.redditmedia.com/rc0lfttpp4he1_t5_2gpmw9/1000022972 | 9.8 KiB | 9.7 KiB |
snoo_tableflip span.flex > rpl-hovercard > button.flex > img.object-contain | emoji.redditmedia.com/nbgogsm7aezz_t5_3nqvj/snoo_tableflip | 7.1 KiB | 7.0 KiB |
Taylor span.flex > rpl-hovercard > button.flex > img.object-contain | emoji.redditmedia.com/ruzgb9fc7sxg1_t5_2r397/Taylor | 7.0 KiB | 6.9 KiB |
span.text-20 > span.inline-flex > span.inline-block > img.mb-0 span.text-20 > span.inline-flex > span.inline-block > img.mb-0 | /t5_2r9ei/styles/communityIcon_9cduraekyr4d1.png?width=96... | 5.9 KiB | 5.7 KiB |
r/news - California farmers to destroy 420,000 peach trees after Del Monte coll… div.col-start-2 > div.relative > a.block > img.mb-0 | /HPPn5dmVehoAdc3aC2MBeQkDoZ0xUMJqQxdjx6RH3OY.png?width=14... | 6.6 KiB | 4.8 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| reddit.com/ | 206 ms |
| www.reddit.com/ | 240 ms |
| /?solution=0d6248ae22830ba40d6248ae22830ba4&js_challenge=... | 0.0 ms |
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 349.2 KiB | 154.3 KiB |
| /js/concat?prefix=en-US/&chunks=18xEaZZ3EO,1Fw5-nGEK9,3Q2... | 312.7 KiB | 147.0 KiB |
| accounts.google.com/gsi/client | 95.4 KiB | 71.1 KiB |
| /js/concat?prefix=en-US/&chunks=BPTMQEGQQy,DfXwRPtIPU,Dtc... | 145.1 KiB | 68.5 KiB |
| www.googletagmanager.com/gtag/js?id=AW-788729857 | 137.4 KiB | 53.0 KiB |
| www.redditstatic.com/shreddit/en-US/DRsNWZxIzQ.js | 139.0 KiB | 45.4 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Total CPU Time | Script Evaluation | Script Parse |
|---|---|---|---|
| /?solution=0d6248ae22830ba40d6248ae22830ba4&js_challenge=... | 1.4 s | 454 ms | 4.1 ms |
| /js/concat?prefix=en-US/&chunks=BPTMQEGQQy,DfXwRPtIPU,Dtc... | 1.4 s | 523 ms | 0.5 ms |
| /js/concat?prefix=en-US/&chunks=18xEaZZ3EO,1Fw5-nGEK9,3Q2... | 869 ms | 249 ms | 4.8 ms |
| www.redditstatic.com/shreddit/en-US/DRsNWZxIzQ.js | 860 ms | 715 ms | 0.6 ms |
| www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 457 ms | 398 ms | 24 ms |
| Unattributable | 456 ms | 20 ms | 0.0 ms |
| www.redditstatic.com/shreddit/en-US/CGTMIGYAP9.js | 112 ms | 81 ms | 0.1 ms |
| www.googletagmanager.com/gtag/js?id=AW-788729857 | 99 ms | 84 ms | 15 ms |
| accounts.google.com/gsi/client | 68 ms | 58 ms | 6.5 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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 2.6 s |
| Other | 1.4 s |
| Style & Layout | 1.2 s |
| Rendering | 326 ms |
| Parse HTML & CSS | 124 ms |
| Script Parsing & Compilation | 58 ms |
| Garbage Collection | 54 ms |
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| faceplate-expandable-section-helper { display: contents; } … | 51.2 KiB | 48.3 KiB |
| faceplate-expandable-section-helper{display:contents} … | 36.4 KiB | 33.0 KiB |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
ARIA
Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
Media time div.controls > div.control-bar > div.disappearing-controls > shreddit-progress-bar.embed-s:hidden |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Names and labels
Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
a.absolute a.absolute |
a.z-1 a.z-1 |
a.absolute a.absolute |
a.absolute a.absolute |
a.z-1 a.z-1 |
a.absolute a.absolute |
a.absolute a.absolute |
a.z-1 a.z-1 |
a.absolute a.absolute |
a.absolute a.absolute |
a.z-1 a.z-1 |
a.absolute a.absolute |
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Tables and lists
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
r/NoStupidQuestions
7,175,364 members
r/Minecraft
8,665,751 members
r/Fitness
1… aside.right-rail-popular-communities > div.px-md > li#popular-communities-list > ul.p-0 |
Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
r/NoStupidQuestions
7,175,364 members
r/Minecraft
8,665,751 members
r/Fitness
1… aside.flex > aside.right-rail-popular-communities > div.px-md > li#popular-communities-list |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Best practices
Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
a.relative a.relative |
https://www.independent.co.uk/news/world/americas/california-peach-trees-destro… div.col-start-1 > div > div.relative > a.post-link |
a.cursor-pointer a.cursor-pointer |
a.cursor-pointer a.cursor-pointer |
https://thefirmo.com/eating-eggs-five-times-a-week-was-linked-to-a-27-lower-alz… div.col-start-1 > div > div.relative > a.post-link |
https://finance.yahoo.com/markets/stocks/articles/mark-zuckerberg-just-told-8-1… div.col-start-1 > div > div.relative > a.post-link |
https://dropr.co/v/F9iqSH div.col-start-1 > div > div.relative > a.post-link |
These items highlight common accessibility best practices.
Best Practices
General
Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
accounts.google.com/gsi/client line 85, col 88 | [GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token. |
Connecting to 'https://www.google.com/rmkt/collect/788729857/?random=1778412214643&cv=11&fst=1778412214643&fmt=8&bg=ffffff&guid=ON&async=1&en=gtag.config>m=45be6562v9217137991za200zd9217137991xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938465~115938468~118463262&u_w=800&u_h=600&url=https%3A%2F%2Fwww.reddit.com%2F%3Fsolution%3D0d6248ae22830ba40d6248ae22830ba4%26js_challenge%3D1%26token%3Dbbbe4bf1c9a2b5160829c4be34da5861415b9755668f1b1998c009344611ffed%26jsc_orig_r%3D&ref=https%3A%2F%2Fwww.reddit.com%2F&rcb=4&frm=0&tiba=Reddit%20-%20The%20heart%20of%20the%20internet&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=770497545.1778412215&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&gcp=5' violates the following Content Security Policy directive: "connect-src 'self' *.redditmedia.com *.redd.it *.reddit.com www.redditstatic.com vimeo.com accounts.google.com/gsi/ www.google.com/recaptcha/ reddit-uploaded-emoji.s3-accelerate.amazonaws.com reddit-uploaded-media.s3.amazonaws.com reddit-uploaded-media.s3-accelerate.amazonaws.com reddit-uploaded-video.s3.amazonaws.com reddit-uploaded-video.s3-accelerate.amazonaws.com reddit-subreddit-uploaded-media.s3-accelerate.amazonaws.com wss://*.wss.redditmedia.com wss://gql-realtime.reddit.com *.giphy.com js.stripe.com support.reddithelp.com matrix.redditspace.com www.google.com/ccm/ bridge.worldcoin.org". The action has been blocked. | |
Fetch API cannot load https://www.google.com/rmkt/collect/788729857/?random=1778412214643&cv=11&fst=1778412214643&fmt=8&bg=ffffff&guid=ON&async=1&en=gtag.config>m=45be6562v9217137991za200zd9217137991xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938465~115938468~118463262&u_w=800&u_h=600&url=https%3A%2F%2Fwww.reddit.com%2F%3Fsolution%3D0d6248ae22830ba40d6248ae22830ba4%26js_challenge%3D1%26token%3Dbbbe4bf1c9a2b5160829c4be34da5861415b9755668f1b1998c009344611ffed%26jsc_orig_r%3D&ref=https%3A%2F%2Fwww.reddit.com%2F&rcb=4&frm=0&tiba=Reddit%20-%20The%20heart%20of%20the%20internet&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=770497545.1778412215&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&data=event%3Dgtag.config&gcp=5. Refused to connect because it violates the document's Content Security Policy. | |
Not signed in with the identity provider. |
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.
Performance issues directly impact user engagement and conversion rates.
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.
Crawling and Indexing
Search engines are unable to include your pages in search results if they don't have permission to crawl them. Learn more about crawler directives.
Performance issues directly impact user engagement and conversion rates.
| Blocking Directive Source |
|---|
https://www.reddit.com/robots.txt |
To appear in search results, crawlers need access to your app.