Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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.

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.

Request	Cache TTL	Transfer Size
www.oracle.com/asset/web/css/redwood-base.css	1800.0 s	161.9 KiB
www.oracle.com/asset/web/css/redwood-styles.css	1800.0 s	116.2 KiB
www.oracle.com/asset/sequoia/fonts/oraclesansvf.woff2	1800.0 s	72.0 KiB
www.java.com/jcom/assets/group1.js	3600.0 s	41.6 KiB
www.java.com/jcom/assets/js/theme.min.js	3600.0 s	34.7 KiB
www.oracle.com/asset/sequoia/css/sequoia-core.css	1800.0 s	31.2 KiB
www.java.com/jcom/assets/jcom_simplepage.css	3600.0 s	28.7 KiB
www.java.com/jcom/images/javaUser.jpg	3600.0 s	26.9 KiB
www.java.com/jcom/assets/jcom_redwood.css	3600.0 s	8.8 KiB
www.oracle.com/asset/web/analytics/infinity_common.js	1800.0 s	6.7 KiB
/notice?domain=oracle.com&c=teconsent&js=bb&noticeType=bb...	3600.0 s	6.8 KiB
www.oracle.com/asset/web/analytics/infinity_click_tracking_ocom.js	1800.0 s	5.7 KiB
www.java.com/jcom/assets/jcom_screen.css	3600.0 s	5.3 KiB
www.java.com/jcom/assets/jcom_oldcss.css	3600.0 s	4.6 KiB
/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c124171768917...	86400.0 s	6.9 KiB
www.java.com/jcom/images/Java-horz-wht.svg	3600.0 s	2.3 KiB
www.java.com/jcom/assets/remote.js	3600.0 s	1.6 KiB
www.java.com/jcom/assets/jcom_print.css	3600.0 s	707 B
www.java.com/jcom/assets/footer.min.js	3600.0 s	613 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:0.146894] map[node:map[boundingRect:map[bottom:562 height:121 left:61 right:351 top:441 width:290] lhId:page-3-DIV nodeLabel:Accept all Decline all View and change cookie preferences path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,0,DIV,0,DIV,3,DIV selector:div > div.mainContent > div > div.pdynamicbutton snippet:<div class="pdynamicbutton" style="visibility: visible;"> type:node] score:0.076478 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:649 height:20 left:291 right:351 top:629 width:60] lhId:page-8-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:562 height:121 left:61 right:351 top:441 width:290] lhId:page-3-DIV nodeLabel:Accept all Decline all View and change cookie preferences path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,0,DIV,0,DIV,3,DIV selector:div > div.mainContent > div > div.pdynamicbutton snippet:<div class="pdynamicbutton" style="visibility: visible;"> type:node] score:0.052805 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:649 height:20 left:291 right:351 top:629 width:60] lhId:page-8-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:659 height:41 left:41 right:371 top:618 width:330] lhId:page-2-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:0.014681 subItems:map[items:[map[cause:Unsized image element]] type:subitems]] map[node:map[boundingRect:map[bottom:562 height:121 left:61 right:351 top:441 width:290] lhId:page-3-DIV nodeLabel:Accept all Decline all View and change cookie preferences path:1,HTML,6,BODY,18,DIV,0,DIV,2,DIV,a,#document-fragment,1,DIV,0,DIV,0,DIV,0,DIV,3,DIV selector:div > div.mainContent > div > div.pdynamicbutton snippet:<div class="pdynamicbutton" style="visibility: visible;"> type:node] score:0.00275 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:649 height:20 left:291 right:351 top:629 width:60] lhId:page-8-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:118 height:44 left:20 right:392 top:74 width:372] lhId:page-1-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:0.00018 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.oracle.com/asset/sequoia/fonts/oraclesansvf.woff2]]] 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.

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.

URL	Transfer Size	Duration
www.oracle.com/asset/web/css/redwood-styles.css	116.2 KiB	601 ms
www.oracle.com/asset/web/css/redwood-base.css	161.9 KiB	1.5 s
www.oracle.com/asset/sequoia/css/sequoia-core.css	31.2 KiB	150 ms
www.java.com/jcom/assets/js/theme.min.js	34.7 KiB	300 ms
www.java.com/jcom/assets/jcom_redwood.css	8.8 KiB
www.java.com/jcom/assets/jcom_simplepage.css	28.7 KiB	450 ms

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.

	URL	Resource Size	Est Savings
image description here `div.cwidth > div.cgrid > figure.sh01media > img.ratio-16x9`	www.java.com/jcom/images/javaUser.jpg	26.7 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.9 s

URL	Time Spent
java.com/	1.2 s
www.java.com/	775 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.

Element	Layout shift score
Accept all Decline all View and change cookie preferences `div > div.mainContent > div > div.pdynamicbutton`	0.076
Accept all Decline all View and change cookie preferences `div > div.mainContent > div > div.pdynamicbutton`	0.053
Privacy Policy \| Powered by `div.wrapper > div > div.footer`	0.015
Accept all Decline all View and change cookie preferences `div > div.mainContent > div > div.pdynamicbutton`	0.003
Java `div.cwidth > div.cgrid > header.cgrid-6 > h1.hdg-xl`	0.000

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

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.

Diagnostics

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

URL	Transfer Size	Est Savings
www.java.com/jcom/assets/jcom_redwood.css	8.8 KiB	2.1 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

URL	Transfer Size	Est Savings
www.java.com/jcom/assets/js/theme.min.js	34.6 KiB	6.2 KiB

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: 1.6 s 330.0 KiB

URL	Transfer Size	Est Savings
www.oracle.com/asset/web/css/redwood-base.css	160.8 KiB	159.5 KiB
www.oracle.com/asset/web/css/redwood-styles.css	115.1 KiB	115.1 KiB
www.java.com/jcom/assets/jcom_simplepage.css	28.5 KiB	28.3 KiB
www.oracle.com/asset/sequoia/css/sequoia-core.css	30.1 KiB	27.0 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: 150 ms 45.6 KiB

URL	Transfer Size	Est Savings
www.java.com/jcom/assets/js/theme.min.js	34.6 KiB	24.3 KiB
consent.trustarc.com/asset/adv-bundle.js?v=v1.7-1729	77.8 KiB	21.2 KiB

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.

Category	Time Spent
Script Evaluation	1.2 s
Other	736 ms
Style & Layout	699 ms
Parse HTML & CSS	269 ms
Script Parsing & Compilation	143 ms
Garbage Collection	95 ms
Rendering	37 ms

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
image description here `div.cwidth > div.cgrid > figure.sh01media > img.ratio-16x9`	www.java.com/jcom/images/javaUser.jpg

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

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Avoids enormous network payloads Total size was 980 KiB

●JavaScript execution time 1.3 s

●Avoid long main-thread tasks 13 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 130 ms

●Server Backend Latencies 20 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

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
Accept all `div.mainContent > div > div.pdynamicbutton > a.call`
Decline all `div.mainContent > div > div.pdynamicbutton > a.required`
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-div205502739110645569 > div#pop-div306560129672858978 > div#pop-frame016586970698812853 `body.f20 > div#pop-div205502739110645569 > div#pop-div306560129672858978 > div#pop-frame016586970698812853`

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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Support `div.u10w5 > div.u10-links > p > a`
Privacy `div.u10w5 > div.u10-links > p > a`
Terms of Use `div.u10w5 > div.u10-links > p > a`
Trademarks `div.u10w5 > div.u10-links > p > a`

These items highlight common accessibility best practices.

○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

●`[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.

Best Practices

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
Oracle Logo `div > div#cookieMainHeader > span.logo > img`	consent.trustarc.com/get?name=oralogo-black.gif	133 x 18	133 x 18	200 x 27

●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

●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`