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· 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.

62

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
js.hsforms.net/forms/embed/v2.js300.0 s193.8 KiB
i.ytimg.com/vi/Q4csFhDtCt4/hqdefault.jpg7200.0 s44.9 KiB
livesearch-autocomplete.magento-ds.com/v1/LiveSearchAutocomplete.js0.0 ms32.2 KiB
i.ytimg.com/vi/sqTIUvmcUvY/hqdefault.jpg7200.0 s39.8 KiB
i.ytimg.com/vi/hm-n1yeiu6M/hqdefault.jpg7200.0 s35.4 KiB
livesearch-metrics.magento-ds.com/v0/liveSearchMetrics.js0.0 ms19.1 KiB
js.braintreegateway.com/web/3.112.0/js/paypal-checkout.min.js3600.0 s16.5 KiB
js.braintreegateway.com/web/3.112.0/js/client.min.js3600.0 s12.8 KiB
magento-recs-sdk.adobe.net/v2/index.js0.0 ms9.7 KiB
i.ytimg.com/vi/sXuw1smWxhQ/hqdefault.jpg7200.0 s12.4 KiB
commerce.adobedtm.com/v6/ds.min.js0.0 ms8.0 KiB
widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js86400.0 s8.1 KiB
rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js3600.0 s2.8 KiB
invitejs.trustpilot.com/tp.min.js86400.0 s4.0 KiB
commerce.adobedtm.com/recommendations/events/v1/recommendationsEvents.min.js0.0 ms1.3 KiB

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:0.127661] map[node:map[boundingRect:map[bottom:8707 height:8618 left:0 right:1350 top:89 width:1350] lhId:page-43-DIV nodeLabel:SIGN IN My Cart Search Search entire store. Use arrow keys to navigate autocomp… path:1,HTML,1,BODY,23,DIV selector:body#html-body > div.page-wrapper snippet:<div class="page-wrapper"> type:node] score:0.127661 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/kiwi-maru/KiwiMaru-Light.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/kiwi-maru/KiwiMaru-Medium.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/kiwi-maru/KiwiMaru-Regular.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-ExtraLight.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-ExtraLightItalic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-Italic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-Light.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-LightItalic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-Medium.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-MediumItalic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-Regular.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-SemiBold.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-SemiBoldItalic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-Thin.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/frontend/SparkFun/default/default/fonts/montserrat/static/Montserrat-ThinItalic.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/fonts/opensans/regular/opensans-400.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/fonts/opensans/semibold/opensans-600.woff2]] map[cause:Web font extra:map[type:url value:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/fonts/opensans/bold/opensans-700.woff2]]] type:subitems]]]
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:0.005750999999999999] map[node:map[boundingRect:map[bottom:240 height:42 left:1042 right:1197 top:198 width:155] lhId:page-48-LI nodeLabel:All Categories path:1,HTML,1,BODY,23,DIV,1,HEADER,1,DIV,2,DIV,0,DIV,0,NAV,0,UL,7,LI selector:div#store.menu > nav.navigation > ul#ui-id-1 > li.level0 snippet:<li class="level0 nav-8 category-item last level-top ui-menu-item" data-category-id="1792"> type:node] score:0.003686] map[node:map[boundingRect:map[bottom:678 height:417 left:345 right:1335 top:261 width:990] lhId:page-53-DIV nodeLabel:New Product BlueSMiRF v2 - JST A wireless serial bridge made for Bluetooth-enab… path:1,HTML,1,BODY,23,DIV,2,MAIN,3,DIV,0,DIV,3,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV selector:div.pagebuilder-column-group > div.pagebuilder-column-line > div.pagebuilder-column > div.pagebuilder-slider snippet:<div class="pagebuilder-slider slick-initialized slick-slider accessible-slick slick-d…" data-content-type="slider" data-appearance="default" data-autoplay="false" data-autoplay-speed="4000" data-fade="false" data-infinite-loop="false" data-show-arrows="false" data-show-dots="true" data-accessibility="true" data-element="main" data-pb-style="QKX5FI4" role="region" aria-label="carousel" tabindex="-1"> type:node] score:0.002034] map[node:map[boundingRect:map[bottom:348 height:184 left:1248 right:1432 top:164 width:184] lhId:page-58-SPAN nodeLabel:New Product path:1,HTML,1,BODY,23,DIV,2,MAIN,3,DIV,0,DIV,3,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,A,0,DIV,0,SPAN selector:div.content-col-md-5 > a > div.pagebuilder-slide-wrapper > span.pagebuilder-label snippet:<span class="pagebuilder-label pagebuilder-label--top-right pagebuilder-label--large" aria-hidden="true" data-label-text="New\nProduct" data-label-position="top-right" data-label-font-size="large" data-element="label" data-pb-style="OYFE03Q"> type:node] score:3.1e-05]]

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:49.711 source:map[column:25 line:66 type:source-location url:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/SparkFun_Pagebuilder/js/content-type/products/appearance/carousel/widget-mixin.js 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:76.532 source:map[type:text value:[unattributed]]] map[reflowTime:69.367 source:map[column:27 line:6442 type:source-location url:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js urlProvider:network]] map[reflowTime:0.616 source:map[column:66 line:6404 type:source-location url:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js urlProvider:network]] map[reflowTime:4.389 source:map[column:63 line:6442 type:source-location url:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js urlProvider:network]] map[reflowTime:5.376 source:map[column:24 line:9791 type:source-location url:https://www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js 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
New Product BlueSMiRF v2 - JST A wireless serial bridge made for Bluetooth-enab… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper
/media/.renditions/wysiwyg/homepage/FeaturedContent/Secon...224.1 KiB152.9 KiB
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png149.3 KiB140.3 KiB
New Product Thing Plus - ESP32-C5 The latest ESP32 board for wireless applicati… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper
/media/.renditions/wysiwyg/homepage/FeaturedContent/Large...207.7 KiB136.5 KiB
Mic Price Check div.sparkfun-blog-item > figure > a > img
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png129.5 KiB120.5 KiB
Fan Favorite More speed and power than you ever thought possible in a microcon… div.pagebuilder-column > div.content-col-md-5 > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/FeaturedContent/Secon...153.5 KiB116.2 KiB
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/kits.jpg?f...118.7 KiB109.0 KiB
Explore SparkFun's versatile lineup of RedBoards all designed in the familiar A… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/redboard-li...160.3 KiB104.4 KiB
New Product 9DoF IMU Breakout - IM19 A motion tracking breakout that brings tog… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper
/media/.renditions/wysiwyg/homepage/FeaturedContent/Secon...167.3 KiB96.1 KiB
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img
/c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E...84.9 KiB75.9 KiB
Thing Plus boards come in a familiar footprint all with different specificatio… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/thing-plus-...129.9 KiB74.1 KiB
A solderless, modular interface ecosystem that allows you to interchange your c… div.pagebuilder-column > div.content-col-md-5 > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/micromod-da...123.8 KiB68.0 KiB
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img
/c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S...56.1 KiB53.0 KiB
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img
/c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed...50.3 KiB47.2 KiB
Protyping with I²C has never been more simple. Learn More div.pagebuilder-column > div.content-align-md-top > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/qwiic-conne...99.6 KiB43.8 KiB
A full suite of products dedicated to knowing where you stand. Position, Navig… div.pagebuilder-column > div.content-align-md-top > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/sparkpnt-fa...97.2 KiB35.5 KiB
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img
/c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-...42.0 KiB33.0 KiB
Wireless Bluetooth board with data on a smartphone div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/BluetoothT...41.6 KiB32.0 KiB
The SparkFun RTK Facet in its black carrying case with accessories on a white b… a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...34.0 KiB29.2 KiB
The SparkFun 9DoF IMU Breakout - IM19 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...33.9 KiB29.1 KiB
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/DisplayOLE...36.2 KiB26.6 KiB
Top Seller Automatically detects Qwiic sensors and starts logging data instant… div.pagebuilder-column > div.content-col-md-7 > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/FeaturedContent/Secon...58.2 KiB20.9 KiB
Data Logger board with data on a computer in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/DataLogger...26.0 KiB16.5 KiB
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/Environmen...25.3 KiB16.1 KiB
A person controlling audio knobs with a speaker in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/AudioThumb...22.6 KiB14.4 KiB
Biometric sensor on an arm div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/biometrics...22.2 KiB14.1 KiB
SparkFun's own fully certified, ultra low power microprocessor module. Learn M… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper
/media/.renditions/wysiwyg/homepage/ecosystem/artemis-lig...44.6 KiB12.3 KiB
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/rfid-featu...11.0 KiB7.0 KiB
SparkFun GPS Dead Reckoning Breakout - NEO-M8U (Qwiic) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...11.2 KiB6.3 KiB
SparkPNT FPX-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...11.2 KiB6.3 KiB
Raspberry Pi 5 - 16GB a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...10.8 KiB6.0 KiB
SparkPNT FPX a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...10.8 KiB5.9 KiB
SparkPNT FPM-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...10.6 KiB5.7 KiB
SparkPNT FPM a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...10.2 KiB5.3 KiB
Feature image of the Teensy 4.0 on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...10.2 KiB5.3 KiB
SparkPNT FPL-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...9.3 KiB4.9 KiB
The SparkFun Qwiic Relay - 1x1A DPDT from a top angle. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...9.1 KiB4.7 KiB
SparkPNT FPL a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...8.7 KiB4.5 KiB
The SparkFun Thing Plus - ESP32-C5 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...8.7 KiB4.5 KiB
Raspberry Pi 4 Model B (8 GB) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...8.3 KiB4.3 KiB
Front facing product photo of the NVIDIA Jetson Orin™ Nano Super Developer Kit … a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...8.1 KiB4.2 KiB
NVIDIA Jetson AGX Orin 64GB Developer Kit on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...8.0 KiB4.2 KiB
SMD LED - RGB WS2812B (Whole Reel) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo
/media/catalog/product/cache/df4360b598d6f0c75fa659693b37...7.7 KiB4.0 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-42-DIV
nodeLabel: BROWSE OUR FULL CATALOG Shop All Categories FREE DOMESTIC SHIPPING On most ord…
path: 1,HTML,1,BODY,23,DIV,2,MAIN,3,DIV,0,DIV,3,DIV
selector: main#maincontent > div.columns > div.column > div.homepage__hero-banner
snippet: <div class="homepage__hero-banner" data-content-type="row" data-appearance="full-width" data-enable-parallax="0" data-parallax-speed="0.5" data-background-images="{}" data-background-type="image" data-video-loop="true" data-video-play-only-visible="true" data-video-lazy-load="true" data-video-fallback-src="" data-element="main" data-pb-style="GM3I434">

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
/static/version1775629953/frontend/SparkFun/default/en_US...9.0 KiB
/static/version1775629953/base/Magento/base/default/requi...20.0 KiB
/static/version1775629953/frontend/SparkFun/default/en_US...14.3 KiB
/static/version1775629953/base/Magento/base/default/mage/...1.9 KiB
/static/version1775629953/base/Magento/base/default/mage/...2.3 KiB
/static/version1775629953/frontend/SparkFun/default/defau...89.7 KiB82 ms
/static/version1775629953/frontend/SparkFun/default/defau...25.8 KiB
/static/version1775629953/base/Magento/base/default/jquer...472 B
/static/version1775629953/frontend/Magento/base/default/T...540 B
/static/version1775629953/frontend/Magento/base/default/A...1.4 KiB
/static/version1775629953/base/Magento/base/default/mage/...1.5 KiB

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.

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
/c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed...http/1.1
/c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S...http/1.1
cdn.sparkfun.com/c/500-282/assets/learn_tutorials/3/9/6/9/Co2SensingCarThumb.pnghttp/1.1
/c/500-282/assets/learn_tutorials/3/8/3/7/Breadboard_powe...http/1.1
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.pnghttp/1.1
/c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E...http/1.1
/c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-...http/1.1
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.pnghttp/1.1

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: 204 ms
URLTime Spent
sparkfun.com/204 ms
www.sparkfun.com/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
SIGN IN My Cart Search Search entire store. Use arrow keys to navigate autocomp… body#html-body > div.page-wrapper
0.128
All Categories div#store.menu > nav.navigation > ul#ui-id-1 > li.level0
0.004
New Product BlueSMiRF v2 - JST A wireless serial bridge made for Bluetooth-enab… div.pagebuilder-column-group > div.pagebuilder-column-line > div.pagebuilder-column > div.pagebuilder-slider
0.002
New Product div.content-col-md-5 > a > div.pagebuilder-slide-wrapper > span.pagebuilder-label
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

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: 80 ms 104.0 KiB
URLTransfer SizeEst Savings
/static/version1775629953/frontend/SparkFun/default/defau...89.4 KiB81.5 KiB
/static/version1775629953/frontend/SparkFun/default/defau...25.5 KiB22.4 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: 40 ms 331.2 KiB
URLTransfer SizeEst Savings
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js361.8 KiB177.1 KiB
js.hsforms.net/forms/embed/v2.js186.5 KiB74.6 KiB
unpkg.com/@adobe/magento-storefront-event-collector@%5E1/dist/index.js44.9 KiB31.5 KiB
/static/version1775629953/base/Magento/base/default/knock...68.9 KiB24.9 KiB
www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js81.8 KiB23.0 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
www.sparkfun.com/1.6 s942 ms14 ms
Unattributable618 ms15 ms0.0 ms
www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js295 ms218 ms11 ms
/static/version1775629953/base/Magento/base/default/jquer...289 ms249 ms0.7 ms
/static/version1775629953/base/Magento/base/default/mage/...194 ms153 ms0.3 ms
/static/version1775629953/base/Magento/base/default/Spark...168 ms61 ms0.2 ms
/static/version1775629953/base/Magento/base/default/requi...151 ms112 ms2.1 ms
js-agent.newrelic.com/nr-spa-1.313.1.min.js126 ms92 ms2.7 ms
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js112 ms85 ms23 ms
js.hsforms.net/forms/embed/v2.js103 ms84 ms15 ms
/static/version1775629953/frontend/SparkFun/default/defau...82 ms71 ms0.1 ms
/static/version1775629953/base/Magento/base/default/mage/...51 ms17 ms0.2 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 Evaluation2.4 s
Other974 ms
Style & Layout552 ms
Script Parsing & Compilation196 ms
Parse HTML & CSS113 ms
Rendering59 ms
Garbage Collection47 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

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 222.8 KiB
URLTransfer SizeEst Savings
www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js81.8 KiB53.0 KiB
/static/version1775629953/base/Magento/base/default/knock...68.9 KiB40.0 KiB
/static/version1775629953/base/Magento/base/default/requi...19.7 KiB13.8 KiB
/static/version1775629953/base/Magento/base/default/under...18.6 KiB10.4 KiB
/static/version1775629953/base/Magento/base/default/vimeo...14.7 KiB8.9 KiB
/static/version1775629953/base/Magento/base/default/jquer...17.1 KiB8.5 KiB
/static/version1775629953/base/Magento/base/default/jquer...13.9 KiB7.7 KiB
/static/version1775629953/frontend/SparkFun/default/defau...14.9 KiB6.1 KiB
/static/version1775629953/base/Magento/base/default/mage/...12.7 KiB5.7 KiB
/static/version1775629953/frontend/SparkFun/default/defau...8.1 KiB4.9 KiB
/static/version1775629953/base/Magento/base/default/jquer...9.5 KiB4.8 KiB
/static/version1775629953/base/Magento/base/default/jquer...8.5 KiB4.7 KiB
/static/version1775629953/base/Magento/base/default/jquer...7.2 KiB4.3 KiB
/static/version1775629953/frontend/SparkFun/default/en_US...8.8 KiB3.7 KiB
/static/version1775629953/base/Magento/base/default/jquer...7.5 KiB3.6 KiB
/static/version1775629953/base/Magento/base/default/jquer...6.4 KiB3.4 KiB
/static/version1775629953/frontend/SparkFun/default/defau...6.0 KiB3.2 KiB
/static/version1775629953/base/Magento/base/default/jquer...5.9 KiB3.1 KiB
/static/version1775629953/base/Magento/base/default/Magen...7.3 KiB3.1 KiB
/static/version1775629953/base/Magento/base/default/knock...5.1 KiB3.0 KiB
/static/version1775629953/base/Magento/base/default/jquer...5.3 KiB2.8 KiB
/static/version1775629953/base/Magento/base/default/Magen...3.7 KiB2.5 KiB
/static/version1775629953/base/Magento/base/default/js-st...4.4 KiB2.5 KiB
/static/version1775629953/base/Magento/base/default/Magen...4.4 KiB2.4 KiB
/static/version1775629953/base/Magento/base/default/Magen...5.9 KiB2.4 KiB
/static/version1775629953/base/Magento/base/default/Magen...2.9 KiB2.2 KiB
/static/version1775629953/frontend/SparkFun/default/defau...4.0 KiB2.2 KiB
/static/version1775629953/base/Magento/base/default/jquer...5.2 KiB2.1 KiB
/static/version1775629953/base/Magento/base/default/Magen...3.6 KiB2.0 KiB
/static/version1775629953/base/Magento/base/default/jquer...3.8 KiB2.0 KiB
/static/version1775629953/base/Magento/base/default/Magen...2.9 KiB2.0 KiB
/static/version1775629953/base/Magento/base/default/mage/...2.9 KiB2.0 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/static/version1775629953/frontend/SparkFun/default/defau...1.7 MiB
/static/version1775629953/frontend/SparkFun/default/defau...1.6 MiB
/static/version1775629953/frontend/SparkFun/default/defau...1.6 MiB
/static/version1775629953/frontend/SparkFun/default/defau...833.6 KiB
/static/version1775629953/frontend/SparkFun/default/defau...490.3 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js361.9 KiB
/media/.renditions/wysiwyg/homepage/FeaturedContent/Secon...224.6 KiB
www.sparkfun.com/216.2 KiB
/media/.renditions/wysiwyg/homepage/FeaturedContent/Large...208.2 KiB

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
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/kits.jpg?f...
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/Environmen...
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/DisplayOLE...
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/rfid-featu...
A person controlling audio knobs with a speaker in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/AudioThumb...
Wireless Bluetooth board with data on a smartphone div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/BluetoothT...
Data Logger board with data on a computer in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/DataLogger...
Biometric sensor on an arm div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden
/media/.renditions/wysiwyg/homepage/categories/biometrics...
Mic Price Check div.sparkfun-blog-item > figure > a > img
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img
/c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E...
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img
/c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-...
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img
cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img
/c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed...
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img
/c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S...
Build Your Own High-Concentration CO2 Detector li.sparkfun-resources-item > figure > a.light-contrast > img
cdn.sparkfun.com/c/500-282/assets/learn_tutorials/3/9/6/9/Co2SensingCarThumb.png
Breadboard Power Supply Kit 5V/3.3V Quickstart Guide li.sparkfun-resources-item > figure > a.light-contrast > img
/c/500-282/assets/learn_tutorials/3/8/3/7/Breadboard_powe...

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

●Max Potential First Input Delay 130 ms
●Optimize DOM size
●Font display
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Avoid long main-thread tasks 7 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 70 ms
●Server Backend Latencies 210 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 10 ms
○INP breakdown
○User Timing marks and measures
89

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.

Navigation

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
New Releases div.pagebuilder-column-line > div.pagebuilder-column > div > h5
Best Sellers div.pagebuilder-column-line > div.pagebuilder-column > div > h5

These are opportunities to improve keyboard navigation in your application.

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
comparison body#html-body > ul.compare
Featured Featured submenu GPS / GNSS GPS / GNSS submenu Sensors Sensors submenu… div.section-items > div#store.menu > nav.navigation > ul#ui-id-1
WED JAN 14 2026 What's the difference between the ZED-F9P and the ZED-X20P? Th… div.tabs-content > div#OSKY766 > div > ul#sparkfun-resources-feed-1837347665

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Add to Cart SparkFun 9DoF IMU Breakout - IM19 $199.95 div.slick-track > div#slick-slide10 > div > li.product-item
Add to Cart SEGGER J-Link EDU Mini (with USB-C Cable) $89.95 div.slick-track > div#slick-slide11 > div > li.product-item
Add to Cart SparkFun BlueSMiRF v2 - JST $12.95 div.slick-track > div#slick-slide12 > div > li.product-item
Add to Cart Akasa Pi-5 Pro - Aluminum Raspberry Pi 5 Enclosure $29.95 div.slick-track > div#slick-slide13 > div > li.product-item
Add to Cart SparkFun Thing Plus - ESP32-C5 $24.95 div.slick-track > div#slick-slide14 > div > li.product-item
Add to Cart LIDAR-Lite v3 $149.99 div.slick-track > div#slick-slide20 > div > li.product-item
Add to Cart Teensy 4.1 $31.50 div.slick-track > div#slick-slide21 > div > li.product-item
Add to Cart Teensy 4.0 $23.80 div.slick-track > div#slick-slide22 > div > li.product-item
Add to Cart NVIDIA Jetson Orin™ Nano Super Developer Kit $249.00 div.slick-track > div#slick-slide23 > div > li.product-item
Raspberry Pi 5 - 16GB $215.00 div.slick-track > div#slick-slide24 > div > li.product-item

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Featured submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
GPS / GNSS submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
Sensors submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
Development Boards submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
IoT & Wireless submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
Components submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button
Kits submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button

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
●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
●`[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
●Input buttons have discernible text.
●Form elements have associated labels
●`[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
●`[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
●No element has a `[tabindex]` value greater than 0
●Document has a main landmark.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
●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.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○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 type="image">` elements have `[alt]` text
○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>`.
○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.
96

Best Practices

General

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy
●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
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●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
○Mitigate clickjacking with XFO or CSP
92

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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
news.sparkfun.com/16344READ MORE
news.sparkfun.com/16312READ MORE
news.sparkfun.com/16278READ MORE
news.sparkfun.com/16245READ MORE

Format your HTML in a way that enables crawlers to better understand your app’s content.

○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 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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