Lighthouse Mobile
· 0 checks — Mobile 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 long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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.
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
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.
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 | |
|---|---|---|---|
Find the right college for you div#block-cborghomepage > div.cb-org > div.block > div#college-search-block | /modules/site/cb_org_homepage/assets/CB_BigFuture_College... | 236.9 KiB | 179.6 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 |
|---|---|
| collegeboard.org/ | 900 ms |
| www.collegeboard.org/ | 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.
Performance issues directly impact user engagement and conversion rates.
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.
Diagnostics
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| atlas.collegeboard.org/apricot/prod/4.11.5/dx_profile.js | 16.9 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| atlas.collegeboard.org/apricot/prod/4.11.5/main.min.css | 98.8 KiB | 97.7 KiB |
| atlas.collegeboard.org/apricot/prod/4.11.5/dx_profile.css | 30.8 KiB | 30.5 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| atlas.collegeboard.org/apricot/prod/4.11.5/main.min.js | 140.0 KiB | 127.0 KiB |
| kiwi.collegeboard.org/embed.js | 211.6 KiB | 107.7 KiB |
| cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js | 199.9 KiB | 97.0 KiB |
| bigfuture.collegeboard.org/widgets/v2/CollegeSearchAndSaveTypeahead.js | 87.4 KiB | 58.8 KiB |
| /media/js/js_iVjiK8VqT9Zh3SDpA36V2PzUlkitrd3JUa6lhq4UXhc.... | 63.2 KiB | 48.7 KiB |
| /2blxFu2OYUH5/-opIpNMIkZ/wg/YrzaLGQGX4fNNz/ITk8VCBifQU/Dx... | 196.5 KiB | 39.8 KiB |
| athena.collegeboard.org/2.2.4/cbw-widgets.min.js | 80.2 KiB | 36.6 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 |
|---|---|---|---|
| /2blxFu2OYUH5/-opIpNMIkZ/wg/YrzaLGQGX4fNNz/ITk8VCBifQU/Dx... | 973 ms | 911 ms | 47 ms |
| www.collegeboard.org/ | 618 ms | 3.5 ms | 0.5 ms |
| cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js | 411 ms | 308 ms | 95 ms |
| kiwi.collegeboard.org/embed.js | 338 ms | 251 ms | 72 ms |
| Unattributable | 334 ms | 73 ms | 0.0 ms |
| athena.collegeboard.org/2.2.4/cbw-widgets.min.js | 117 ms | 83 ms | 24 ms |
| bigfuture.collegeboard.org/widgets/v2/CollegeSearchAndSaveTypeahead.js | 108 ms | 85 ms | 20 ms |
| atlas.collegeboard.org/apricot/prod/4.11.5/main.min.css | 91 ms | 0.0 ms | 0.0 ms |
| /media/js/js_iVjiK8VqT9Zh3SDpA36V2PzUlkitrd3JUa6lhq4UXhc.... | 69 ms | 52 ms | 15 ms |
| atlas.collegeboard.org/apricot/prod/4.11.5/main.min.js | 68 ms | 17 ms | 51 ms |
| /media/js/js_7xVIs9b28Jc2EyjmlhfX5taWtTRC8U5mCyz4wBIuaEA.... | 66 ms | 27 ms | 1.5 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 | 1.9 s |
| Other | 558 ms |
| Script Parsing & Compilation | 349 ms |
| Style & Layout | 298 ms |
| Parse HTML & CSS | 119 ms |
| Rendering | 111 ms |
| Garbage Collection | 31 ms |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| The page has an unload handler in the main frame. | Actionable |
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| atlas.collegeboard.org/apricot/prod/4.11.5/dx_profile.css | 31.2 KiB | 4.7 KiB |
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.
Best Practices
General
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| Unload event listeners are deprecated and will be removed. | /media/js/js_iVjiK8VqT9Zh3SDpA36V2PzUlkitrd3JUa6lhq4UXhc.... line 1, col 189000 |
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 |
|---|---|
Creating a worker from 'blob:https://www.collegeboard.org/3d40d98f-dd1b-477b-b43b-52144a66995e' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-inline' 'unsafe-eval' *.collegeboard.org cdnjs.cloudflare.com sdk.amazonaws.com cdn.cookielaw.org www.googletagmanager.com googleads.g.doubleclick.net www.googleadservices.com connect.facebook.net www.youtube.com *.salesforceliveagent.com service.force.com ajax.cloudflare.com js-agent.newrelic.com bam.nr-data.net d10lpsik1i8c69.cloudfront.net s3.amazonaws.com/cdn.aimtell.com/ www.google.com static.lightning.force.com *.my.salesforce.com *.my.salesforce-sites.com apform.secure.force.com www.pagespeed-mod.com cdn.ckeditor.com cdnjs.cloudflare.com/ajax/libs/cropper/4.0.0/cropper.min.js assets.calendly.com platform.twitter.com *.appcues.com cb-zscaler-pages.s3.amazonaws.com www.buzzsprout.com cdn.jsdelivr.net/npm/js-cookie@3.0.5/dist/js.cookie.min.js collegeboard--full.sandbox.my.site.com collegeboard.my.site.com cdn.aimtell.com client.rum.us-east-1.amazonaws.com/1.0.2/cwr.js cdn.jsdelivr.net/npm/@fingerprintjs/fingerprintjs@3.3.2/dist/fp.js pagead2.googlesyndication.com blue.mbsy.co https://athena.collegeboard.org/2.2.4/cbw-widgets.min.js https://atlas.collegeboard.org/apricot/prod/4.11.5/dx_profile.js https://atlas.collegeboard.org/apricot/prod/4.11.5/main.min.js https://bigfuture.collegeboard.org/widgets/v2/CollegeSearchAndSaveTypeahead.js https://cdn.jsdelivr.net/npm/html2canvas@1.3.2/dist/html2canvas.min.js https://cdn.jsdelivr.net/npm/js-cookie@3.0.5/dist/js.cookie.min.js https://cdnjs.cloudflare.com/ajax/libs/cropper/4.0.0/cropper.min.js https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js https://github.com/mattfarina/farbtastic/blob/master/src/farbtastic.js". Note that 'worker-src' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
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.