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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.

74

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
www.oracle.com/asset/web/css/redwood-base.css1800.0 s161.9 KiB
www.oracle.com/asset/web/css/redwood-styles.css1800.0 s116.2 KiB
www.oracle.com/asset/sequoia/fonts/oraclesansvf.woff21800.0 s72.0 KiB
www.java.com/jcom/assets/group1.js3600.0 s41.5 KiB
www.java.com/jcom/assets/js/theme.min.js3600.0 s34.7 KiB
www.oracle.com/asset/sequoia/css/sequoia-core.css1800.0 s31.2 KiB
www.java.com/jcom/images/java-logo.png3600.0 s29.7 KiB
www.java.com/jcom/assets/jcom_simplepage.css3600.0 s28.6 KiB
www.java.com/jcom/images/javaUser.jpg3600.0 s26.9 KiB
www.java.com/jcom/assets/jcom_redwood.css3600.0 s8.8 KiB
www.oracle.com/asset/web/analytics/infinity_common.js1800.0 s6.7 KiB
/notice?domain=oracle.com&c=teconsent&js=bb&noticeType=bb...3600.0 s6.8 KiB
www.oracle.com/asset/web/analytics/infinity_click_tracking_ocom.js1800.0 s5.7 KiB
www.java.com/jcom/assets/jcom_screen.css3600.0 s5.2 KiB
www.java.com/jcom/assets/jcom_oldcss.css3600.0 s4.5 KiB
/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c124171768917...86400.0 s6.9 KiB
www.java.com/jcom/images/Java-horz-wht.svg3600.0 s2.4 KiB
www.java.com/jcom/assets/remote.js3600.0 s1.5 KiB
www.java.com/jcom/assets/jcom_print.css3600.0 s697 B
www.java.com/jcom/assets/footer.min.js3600.0 s598 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.29431999999999997] map[node:map[boundingRect:map[bottom:854 height:796 left:0 right:1350 top:58 width:1350] lhId:page-2-DIV nodeLabel:Java Oracle Java is the #1 programming language and development platform. It r… path:1,HTML,6,BODY,0,DIV,9,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV selector:div.scs-custom-component-wrapper > div#c919abf0-48e9-4752-8ec3-08ffaf8791b7customComponentDiv > div.cpad > div.cwidth snippet:<div class="cwidth f22w1"> type:node] score:0.266074] map[node:map[boundingRect:map[bottom:411 height:42 left:250 right:1100 top:369 width:850] lhId:page-7-DIV nodeLabel:Privacy Policy | Powered by path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,1,DIV selector:div.wrapper > div > div.footer snippet:<div class="footer" style=""> type:node] score:0.017431 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:401 height:20 left:1020 right:1080 top:381 width:60] lhId:page-12-IMG nodeLabel:Company logo for TrustArc path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,1,DIV,0,DIV,4,A,0,IMG selector:div.footer > div.left > a > img.inline-3siarw snippet:<img class="inline-3siarw" alt="Company logo for TrustArc" src="https://consent.trustarc.com/get?name=Powered-By-TrustArc.png" target="_blank"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:411 height:42 left:250 right:1100 top:369 width:850] lhId:page-7-DIV nodeLabel:Privacy Policy | Powered by path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,1,DIV selector:div.wrapper > div > div.footer snippet:<div class="footer" style=""> type:node] score:0.010485 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:401 height:20 left:1020 right:1080 top:381 width:60] lhId:page-12-IMG nodeLabel:Company logo for TrustArc path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,1,DIV,0,DIV,4,A,0,IMG selector:div.footer > div.left > a > img.inline-3siarw snippet:<img class="inline-3siarw" alt="Company logo for TrustArc" src="https://consent.trustarc.com/get?name=Powered-By-TrustArc.png" target="_blank"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:913 height:16 left:532 right:614 top:898 width:82] lhId:page-5-A nodeLabel:Terms of Use path:1,HTML,6,BODY,10,FOOTER,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,P,5,A selector:div.u10w5 > div.u10-links > p > a snippet:<a href="https://www.oracle.com/html/terms.html"> type:node] score:0.000266] map[node:map[boundingRect:map[bottom:221 height:52 left:171 right:663 top:169 width:492] lhId:page-4-H1 nodeLabel:Java path:1,HTML,6,BODY,0,DIV,9,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,5,SECTION,0,DIV,0,DIV,0,HEADER,0,H1 selector:div.cwidth > div.cgrid > header.cgrid-6 > h1.hdg-xl snippet:<h1 class="hdg-xl"> type:node] score:6.4e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:383 height:277 left:687 right:1179 top:106 width:492] lhId:page-1-IMG nodeLabel:image description here path:1,HTML,6,BODY,0,DIV,9,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,5,SECTION,0,DIV,0,DIV,1,FIGURE,0,IMG selector:div.cwidth > div.cgrid > figure.sh01media > img.ratio-16x9 snippet:<img src="/jcom/images/javaUser.jpg" class="ratio-16x9" fetchpriority="high" loading="eager" alt="image description here"> type:node]]] type:subitems]]]

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
div.clearfix > div.jvc0w2 > section.sc04 > ::after div.clearfix > div.jvc0w2 > section.sc04 > ::after
www.java.com/jcom/images/java-logo.png29.5 KiB21.1 KiB
image description here div.cwidth > div.cgrid > figure.sh01media > img.ratio-16x9
www.java.com/jcom/images/javaUser.jpg26.7 KiB4.8 KiB

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
value: no origins were preconnected
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
www.java.com/jcom/assets/js/theme.min.js34.7 KiB
www.oracle.com/asset/web/css/redwood-base.css161.9 KiB371 ms
www.oracle.com/asset/web/css/redwood-styles.css116.2 KiB80 ms
www.oracle.com/asset/sequoia/css/sequoia-core.css31.2 KiB
www.java.com/jcom/assets/jcom_simplepage.css28.6 KiB80 ms
www.java.com/jcom/assets/jcom_redwood.css8.8 KiB

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

Diagnostics

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 330.5 KiB
URLTransfer SizeEst Savings
www.oracle.com/asset/web/css/redwood-base.css160.8 KiB160.0 KiB
www.oracle.com/asset/web/css/redwood-styles.css115.1 KiB115.1 KiB
www.java.com/jcom/assets/jcom_simplepage.css28.4 KiB28.2 KiB
www.oracle.com/asset/sequoia/css/sequoia-core.css30.1 KiB27.2 KiB

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: 80 ms 45.1 KiB
URLTransfer SizeEst Savings
www.java.com/jcom/assets/js/theme.min.js34.5 KiB24.3 KiB
consent.trustarc.com/asset/adv-bundle.js?v=v1.7-172977.8 KiB20.7 KiB

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 2.1 KiB
URLTransfer SizeEst Savings
www.java.com/jcom/assets/jcom_redwood.css8.8 KiB2.1 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 6.2 KiB
URLTransfer SizeEst Savings
www.java.com/jcom/assets/js/theme.min.js34.5 KiB6.2 KiB

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

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: 832 ms
URLTime Spent
java.com/602 ms
www.java.com/229 ms
www.java.com/en/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
Java Oracle Java is the #1 programming language and development platform. It r… div.scs-custom-component-wrapper > div#c919abf0-48e9-4752-8ec3-08ffaf8791b7customComponentDiv > div.cpad > div.cwidth
0.266
Privacy Policy | Powered by div.wrapper > div > div.footer
0.017
Privacy Policy | Powered by div.wrapper > div > div.footer
0.010
Terms of Use div.u10w5 > div.u10-links > p > a
0.000
Java div.cwidth > div.cgrid > header.cgrid-6 > h1.hdg-xl
0.000
●Time to Interactive 1.6 s
●Optimize DOM size
●Font display
●Forced reflow
●LCP breakdown
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Max Potential First Input Delay 50 ms
●Avoids enormous network payloads Total size was 1,010 KiB
●JavaScript execution time 0.1 s
●Minimizes main-thread work 0.9 s
●Avoid long main-thread tasks 1 long task found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 130 ms
●Server Backend Latencies 30 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
88

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.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Powered by div > div.footer > div.left > label

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
privacy policy div.mainContent > div > div#cookieConsentDescription > a

These are opportunities to improve the legibility of your content.

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
body.f20 > div#pop-div2010837468262815197 > div#pop-div306857228213006159 > div#pop-frame09666834307339544 body.f20 > div#pop-div2010837468262815197 > div#pop-div306857228213006159 > div#pop-frame09666834307339544

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Java to run desktop applications div.sc04w1 > ul.sc04cards > li.sc04card > h3.hdg-xsm

These are opportunities to improve keyboard navigation in your application.

○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
●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.
●`button`, `link`, and `menuitem` elements have accessible names
●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
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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.
●`[lang]` attributes have a valid value
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○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
○Buttons have an accessible name
○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.
○`<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
○Image elements do not have `[alt]` attributes that are redundant text.
○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 clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
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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