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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

31

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
id.nbcuni.com/websdk/v2/identity-sdk.min.js600.0 s210.3 KiB
c.amazon-adsystem.com/aax2/apstag.js3600.0 s90.9 KiB
cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js86400.0 s119.3 KiB
jssdkcdns.mparticle.com/js/v2/us1-58b94ff38714bc47bdab2e66cf8e063c/mparticle.js3600.0 s58.1 KiB
assets.adobedtm.com/77ca722dd820/42d7a5c91c9d/launch-1d9325bfcfe3.min.js3600.0 s45.3 KiB
pub.doubleverify.com/dvtag/40158041/DV1940158/pub.js900.0 s33.6 KiB
www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8900.0 s25.4 KiB
cdn.cookielaw.org/scripttemplates/202505.2.0/otGPP.js86400.0 s22.5 KiB
/logos/941b48f1-4637-4ecd-b01d-629494daf8b2/0198a5b3-a6ba...86400.0 s16.2 KiB
cdn.cookielaw.org/consent/01979ef1-ddfd-766c-87f7-cf5b937dd428/otSDKStub.js86400.0 s7.7 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.5 KiB
config.aps.amazon-adsystem.com/configs/32193600.0 s849 B
/77ca722dd820/42d7a5c91c9d/0ba818ebfb81/RC74ad4de95cc2412...3600.0 s592 B
geolocation.onetrust.com/cookieconsentpub/v1/geo/location/dnsfeed0.0 ms252 B
cdn.cookielaw.org/opt-out/otCCPAiab.js86400.0 s0 B

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:5.112 source:map[column:156 line:5 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_4rwGwTfiGRTxCXsvjukH8Iw09JxuSVPT30ihk_o4wQ4.js?scope=header&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA 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:0.58 source:map[column:84992 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.925 source:map[column:83946 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.733 source:map[column:50335 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.533 source:map[column:50393 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:1.026 source:map[column:50457 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.134 source:map[column:49637 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.143 source:map[column:49615 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.56 source:map[column:51395 line:2 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJMk9OvNISVLA.js?scope=footer&delta=0&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:0.478 source:map[column:2449 line:15 type:source-location url:https://www.syfy.com/sites/syfy/files/js/js_mQ1C4Mr_IpDWNt-m5WEUxCwRif2Pp2hLSP41mE9PB1w.js?scope=footer&delta=4&language=en&theme=syfy&include=eJyNUVtywjAMvFDBR9IotiBqhJVKcjvp6etAoUwKnX5Z2sfYu85qlIq1GWUf2vJI71TDd0EeL8KHfizSFew4CEGrolhgxFqE7E5wFB1Qdp6N5_A7YiRTMHL-XPUOWHQgwIqyBGdPmx1GPRGEYZ64Hv9jmPH4t8E5CLIWgldfeS49IccCHhjfVrL0lFk9gq3msaBNsqTNvvKnGa1f1vPepv1MmDVP4G241MJan2h_p9ZKYc0jceVYgTVFGqwX37OIml9ByGjanMQvXV_XB7x_8Ez2o3hrnCfhOqXb9AiD8xt8OSybb_4CrmrlVA urlProvider:network]] map[reflowTime:9.991 source:map[column:10168 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]] map[reflowTime:12.505 source:map[column:4533 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]] map[reflowTime:1.154 source:map[column:10648 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]] map[reflowTime:0.102 source:map[column:16136 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]] map[reflowTime:0.625 source:map[column:56261 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]] map[reflowTime:6.971 source:map[column:10249 line:12 type:source-location url:https://www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8 urlProvider:network]]]

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
Chucky Season 3 div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/all_movies_teaser_desktop_1_5x/p...46.8 KiB42.0 KiB
Reginald the Vampire Season 2 on SYFY div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/all_movies_teaser_desktop_1_5x/p...34.3 KiB29.4 KiB
The Ark Season 2 on SYFY div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/all_movies_teaser_desktop_1_5x/p...30.8 KiB25.9 KiB
Why Sony Scrapped Drew Goddard Sinister Six Movie a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...18.4 KiB15.1 KiB
Ser Duncan the Tall (Peter Claffey) and Ser Arlan Pennytree (Danny Webb) on A K… a > figure.teaser__image > picture > img
/sites/syfy/files/styles/blog_teaser__mobile/public/2026/...17.6 KiB8.8 KiB
Ryan Coogler X-Files inset header div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/fp_scale_crop_302x504/public/202...33.3 KiB8.6 KiB
How Artemis 2 Commander Reid Wiseman Honored Late Wife Carroll on His Journey t… a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...11.1 KiB7.8 KiB
Chucky Returns: Don Mancini Confirms New Movie Will Bring Franchise Back to Hor… a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...10.4 KiB7.1 KiB
Emily Blunt Says Steven Spielberg’s Disclosure Day Answers Close Encounters Que… a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...10.0 KiB6.7 KiB
Rick Moranis Makes First Red Carpet Appearance in 9 Years to Celebrate Spacebal… a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...9.9 KiB6.6 KiB
Chickenpox in Space? Artemis 2's Biggest Mission Is Collecting Astronaut Spit—R… a > div.teaser__image-wrapper > figure.teaser__image > img
/sites/syfy/files/styles/6_col_video/public/media_mpx/thu...9.8 KiB6.5 KiB
Syfywire Logo Rgb Primary Horizontal Wb 3 article.teaser > div.media__image > div.media__image-wrapper > img
/sites/syfy/files/2024/01/syfywire_logo_rgb_primary_horiz...6.0 KiB6.0 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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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
/sites/syfy/files/js/js_0kyLY_f3HxB9hlcG53quogzG5ZEJ5vGEz...642 B
/sites/syfy/files/js/js_4rwGwTfiGRTxCXsvjukH8Iw09JxuSVPT3...4.6 KiB
/sites/syfy/files/css/css_ZpZuI0Sud-mH76z-QlyFvfY63S0Ehho...6.1 KiB
/sites/syfy/files/css/css_fJuI3mh3YgkeWPdSlYRqtvl_oIBslE5...25.7 KiB302 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.

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: 763 ms
URLTime Spent
syfy.com/763 ms
www.syfy.com/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

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 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: 150 ms 17.7 KiB
URLTransfer SizeEst Savings
app.mps.vsnt.net/fetch/ext/load-syfy-d8-web.js?nowrite=257.6 KiB17.7 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: 300 ms 43.2 KiB
URLTransfer SizeEst Savings
/sites/syfy/files/css/css_fJuI3mh3YgkeWPdSlYRqtvl_oIBslE5...25.2 KiB23.6 KiB
21.9 KiB19.6 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: 3.2 s 565.1 KiB
URLTransfer SizeEst Savings
id.nbcuni.com/websdk/v2/identity-sdk.min.js209.8 KiB158.5 KiB
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB125.1 KiB
micro.rubiconproject.com/prebid/dynamic/24610.js129.5 KiB94.6 KiB
cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js119.0 KiB60.7 KiB
c.amazon-adsystem.com/aax2/apstag.js90.5 KiB39.0 KiB
jssdkcdns.mparticle.com/js/v2/us1-58b94ff38714bc47bdab2e66cf8e063c/mparticle.js57.8 KiB32.2 KiB
app.mps.vsnt.net/fetch/ext/load-syfy-d8-web.js?nowrite=257.6 KiB28.7 KiB
/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJM...46.7 KiB26.2 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable855 ms229 ms0.0 ms
www.syfy.com/libraries/swiper-mini/swiper-bundle.min.js?v=11.2.8816 ms116 ms13 ms
/pagead/managed/js/gpt/m202604160201/pubads_impl.js640 ms542 ms77 ms
www.syfy.com/608 ms30 ms2.5 ms
cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js402 ms249 ms62 ms
id.nbcuni.com/websdk/v2/identity-sdk.min.js378 ms218 ms100 ms
/sites/syfy/files/js/js_4rwGwTfiGRTxCXsvjukH8Iw09JxuSVPT3...267 ms240 ms2.1 ms
c.amazon-adsystem.com/aax2/apstag.js249 ms187 ms43 ms
app.mps.vsnt.net/fetch/ext/load-syfy-d8-web.js?nowrite=2236 ms159 ms50 ms
micro.rubiconproject.com/prebid/dynamic/24610.js209 ms161 ms47 ms
cdn.cookielaw.org/scripttemplates/202505.2.0/otGPP.js173 ms153 ms18 ms
cdn.parsely.com/keys/syfy.com/p.js165 ms116 ms12 ms
assets.adobedtm.com/77ca722dd820/42d7a5c91c9d/launch-1d9325bfcfe3.min.js162 ms133 ms18 ms
/sites/syfy/files/js/js_nDQLYdWjPTcTaTEGeObUHmwug2XAPDAJM...129 ms68 ms22 ms
pub.doubleverify.com/dvtag/40158041/DV1940158/pub.js115 ms86 ms14 ms
securepubads.g.doubleclick.net/tag/js/gpt.js89 ms77 ms12 ms
jssdkcdns.mparticle.com/js/v2/us1-58b94ff38714bc47bdab2e66cf8e063c/mparticle.js85 ms57 ms27 ms
cdn.cookielaw.org/consent/01979ef1-ddfd-766c-87f7-cf5b937dd428/otSDKStub.js81 ms71 ms2.9 ms
/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasure...80 ms73 ms4.3 ms
config.aps.amazon-adsystem.com/configs/321962 ms36 ms0.5 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation3.1 s
Other1.2 s
Style & Layout819 ms
Script Parsing & Compilation549 ms
Rendering142 ms
Parse HTML & CSS137 ms
Garbage Collection24 ms

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

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●LCP request discovery
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Avoids enormous network payloads Total size was 1,773 KiB
●User Timing marks and measures 7 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 55 animated elements found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 10 ms
●Server Backend Latencies 60 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 60 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
HBO's Harry Potter Show To Feature These Magical Beasts Read Now Everything We … div.content-primary > section.hero-carousel > div.swiper > ul#swiper-wrapper-f133b927441051d42
SYFY WIRE How Twilight Zone Led To Hollywood Creative Protection SYFY WIRE Jack… div.site-section-wrapper > div.swiper__carousel > div.swiper > ul#swiper-wrapper-8ed8319f576a53ec
4:30 Jack Reynor Breaks Down Lee Cronin’s The Mummy Ending—and That [Spoiler] S… div.site-section-wrapper > div.swiper__carousel > div.swiper > ul#swiper-wrapper-c5084d5158d2fc33
The Ark Chucky Reginald the Vampire Resident Alien Revival SurrealEstate div.site-section-wrapper > div.swiper__carousel > div.swiper > ul#swiper-wrapper-576bfe6fd2a842f7

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

○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
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●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
●Uses ARIA roles only on compatible elements
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[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.
○Image elements do not have `[alt]` attributes that are redundant text.
○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.
92

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.

URLDisplayed sizeActual sizeExpected size
Kit Harington as Jon Snow holding up his wolf puppy in the Game of Thrones pilo… div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/fp_scale_crop_302x504/public/202...302 x 504302 x 504453 x 756
Artemis II splashdown div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/fp_scale_crop_302x504/public/202...302 x 504302 x 504453 x 756
Twilight Zone Still Valley header div.teaser__image-wrapper > figure.teaser__image > picture > img
/sites/syfy/files/styles/fp_scale_crop_302x504/public/202...302 x 504302 x 504453 x 756

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=8CF467C25245...
Failed to load resource: net::ERR_CERT_COMMON_NAME_INVALID
jssdkcdns.mparticle.com/js/v2/us1-58b94ff38714bc47bdab2e66cf8e063c/mparticle.js line 40, col 182681
Your workspace is not enabled to retrieve user audiences.
●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 issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●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
○Use a strong HSTS policy
○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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