https://amazon.com

The Index

Insights

Google Lighthouse Performance

The Google Lighthouse performance score is a metric that measures the speed and performance of a website. It’s an overall score that ranges from 0 to 100 and is generated based on a number of different performance metrics, such as the time it takes for a website to load, the time it takes for a website to become interactive, the size of the resources used by the website, and other factors that impact the user experience.

A high performance score in Google Lighthouse indicates that a website is fast and responsive, which can lead to a better user experience and improved search engine rankings. On the other hand, a low performance score can indicate that a website is slow and unresponsive, and can negatively impact the user experience.

Mobile Performance
56%
Desktop Performance
85%

Core Web Vitals

Core Web Vitals are a set of specific factors that Google considers important in a webpage’s overall user experience. Core Web Vitals are made up of three specific page speed and user interaction measurements: Largest Contentful PaintFirst Input Delay, and Cumulative Layout Shift.

Pass or fail?

MobileFail
DesktopFail

CWV Breakdown

VitalMobileDesktopTarget
Largest Contentful Paint4.9 s1.3 s< 2.5 s
First Input Delay320 ms180 ms< 100ms
Cumulative Layout Shift0.0890.002 0.1

Tracking scripts

All the tracking scripts on the site generated ~80 KB of data

A tracking script is a code snippet designed to track the flow of visitors who visit a website. Media, advertising, and analytics organisations will provide a script to add to your website that sends data directly to their servers. This data can then be used to measure goals and conversions, analyse user behaviour, and influence advertising campaigns.

Consider how much of this data you actually need and use? How often do you review the analytics data, and does this inform genuine change? Are you actively running social media campaigns? Consider pausing or removing tracking scripts that aren’t being actively used.

View details
c.amazon-adsystem.com 1 3 KB
s.amazon-adsystem.com 35 29 KB
ib.adnxs.com 2 2 KB
match.360yield.com 2 799 B
dsum-sec.casalemedia.com 2 2 KB
capi.connatix.com 2 1 KB
amazon.partners.tremorhub.com 1 0 B
imdb.com 1 1 KB
usersync.samplicio.us 1 332 B
ads.samba.tv 1 992 B
pixel.rubiconproject.com 1 1 KB
dpm.demdex.net 2 2 KB
odr.mookie1.com 1 978 B
c1.adform.net 2 2 KB
bs.serving-sys.com 1 879 B
csync.loopme.me 1 229 B
ssum-sec.casalemedia.com 2 2 KB
crb.kargo.com 1 489 B
image2.pubmatic.com 1 879 B
loadus.exelator.com 2 2 KB
facebook.com 1 4 KB
lciapi.ninthdecimal.com 1 844 B
sync-amazon.ads.yieldmo.com 1 921 B
us-u.openx.net 4 2 KB
sync.taboola.com 1 705 B
aa.agkn.com 1 909 B
x.bidswitch.net 2 418 B
tags.bluekai.com 1 0 B
public-prod-dspcookiematching.dmxleo.com 1 361 B
cms.analytics.yahoo.com 1 377 B
spl.zeotap.com 1 902 B
ads.stickyadstv.com 2 1 KB
beacon.krxd.net 1 0 B
ms-cookie-sync.presage.io 1 591 B
cm.g.doubleclick.net 4 4 KB
usermatch.krxd.net 1 0 B
sb.scorecardresearch.com 2 1 KB
eb2.3lift.com 2 2 KB
uipglob.semasio.net 2 1 KB
usersync.gumgum.com 1 378 B
pi.ispot.tv 1 623 B
image6.pubmatic.com 2 1 KB
image4.pubmatic.com 1 678 B
lm.serving-sys.com 1 285 B
mwzeom.zeotap.com 1 680 B
ups.analytics.yahoo.com 2 1 KB

Opportunities

Assets that need text compression enabled6 KB0.001g

By enabling text compression on 1 items, , roughly 5.7 KB could be removed from the page load.

View details
pr 8 KB 6 KB
Optimise images719 KB0.161g

By optimising the following images, roughly 719 KB could be removed from the transfer size, about 13%. This would reduce the CO2 generated per page load from 1.23g grams to 1.07 grams.

Images should be optimised for the web for several reasons:

  1. Reduced file size: Optimizing images can result in a smaller file size, which can help to reduce the amount of data that needs to be downloaded. This can lead to faster page load times and improved performance.
  2. Improved user experience: Optimising images can help to improve the overall user experience, as pages with optimised images load faster and are more responsive.
  3. Lower emissions: Optimising images can help to reduce the emissions associated with data transfer, as less data needs to be transmitted over the network.
  4. Better accessibility: Optimising images can make them more accessible to users with slower connections or limited data plans.
View details
81KkrQWEHIL._SX3000_.jpg 272 KB 5% 27 KB
81KkrQWEHIL._SX3000_.jpg 272 KB 5% 182 KB
7130x7c9NmL._SX3000_.jpg 184 KB 3% 52 KB
71VcGrxQRBL._SX3000_.jpg 145 KB 3% 34 KB
61lwJy4B8PL._SX3000_.jpg 123 KB 2% 29 KB
61kNz8bUcgL._SX3000_.jpg 120 KB 2% 78 KB
61aHWmfj7pL._SX3000_.jpg 111 KB 2% 52 KB
61+zFXn-ZUL._SX1500_.jpg 95 KB 2% 58 KB
61OdzZqmXyL._SX1500_.jpg 82 KB 1% 21 KB
61G29jrlHbL._SX1500_.jpg 78 KB 1% 19 KB
61v0N2FitML._SX1500_.jpg 77 KB 1% 32 KB
61zGYdzA-WL._SX1500_.jpg 65 KB 1% 17 KB
51AnopSwWvL._SX1500_.jpg 49 KB 1% 32 KB
Z8YwjOjqIHxqujG.png 46 KB 1% 31 KB
51RPiINhM7L._SX1500_.jpg 45 KB 1% 11 KB
51YMIE5mtML._SX1500_.jpg 42 KB 1% 19 KB
819i5xJeFiL._AC_SY200_.jpg 14 KB 0% 8 KB
81gewut4vaL._AC_SY200_.jpg 14 KB 0% 9 KB
81CpCNlyO1L._AC_SY200_.jpg 14 KB 0% 9 KB
Subset large font files34 KB0.008g

Fonts should be subsetted to reduce the file size, improve performance, and reduce emissions. Subsetting a font involves removing any characters that are not needed for a particular use case, resulting in a smaller file size and faster page load times. Some specific reasons why fonts should be subsetted include:

  1. Reduced file size: Subsetting a font removes any unused characters, which can result in a smaller file size. This can help to reduce the amount of data that needs to be downloaded, leading to faster page load times and lower emissions.
  2. Improved performance: Fonts that are subsetted are faster to load and render than fonts that are not subsetted. This can help to improve the overall performance of a website, leading to a better user experience.

Overall, subsetting fonts is a good practice for anyone looking to optimize the performance and reduce the emissions of a website of a website.

View details
ozb5-CLHQWI6Soc.woff2 ~29 KB ~12 KB
Dv1WQ5DdeMS5qP7.woff2 ~28 KB ~10 KB
KwhNPG8Jz-Vz2X7.woff2 ~24 KB ~7 KB
VjTR4RqBzY0mUYx.woff2 ~22 KB ~4 KB
WOnTLzkiaEccV7F.woff2 ~18 KB ~313 B
pDxWAF1pBB0dzGB.woff2 ~18 KB ~251 B
2SazJx$EeTHfhMN.woff2 ~18 KB ~128 B
KFPk-9IF4FqAqY-.woff2 ~18 KB ~95 B
Remove third party font files

Font files should be loaded from the same hosting as the website because

  1. Increased loading time: Third-party sub-resources, such as scripts, fonts, or images, need to be downloaded from a separate server before they can be displayed on the website. This can increase the overall loading time of the page, leading to a slower user experience.
  2. Dependence on external servers: The loading of third-party subresources is dependent on the availability and performance of the external servers that host them. If these servers are slow or unavailable, it can result in slow page loading times or even errors.
  3. Increased risk of security threats: Third-party subresources can introduce security risks to a website, as they can contain malicious code or be used to track user activity.
View details
m.media-amazon.com pDxWAF1pBB0dzGB.woff2
m.media-amazon.com KFPk-9IF4FqAqY-.woff2
m.media-amazon.com Dv1WQ5DdeMS5qP7.woff2
m.media-amazon.com VjTR4RqBzY0mUYx.woff2
m.media-amazon.com WOnTLzkiaEccV7F.woff2
m.media-amazon.com 2SazJx$EeTHfhMN.woff2
m.media-amazon.com ozb5-CLHQWI6Soc.woff2
m.media-amazon.com KwhNPG8Jz-Vz2X7.woff2
First Contentful Paint

First Contentful Paint (FCP) is a performance metric that measures the time it takes for the first piece of content to be rendered on the screen when a user navigates to a web page. This content can be any visual element on the page, such as text, images, or a background color.

FCP is important because it directly affects the perceived speed of a website, and can impact user engagement and conversion rates. A faster FCP can lead to a better user experience and improved performance.

Here are a few ways you can optimise your FCP:

  1. Optimise images: Large, unoptimised images can slow down a page’s FCP. You can optimise images by compressing them, reducing their dimensions, and choosing the right format for each image.
  2. Minimise HTTP requests: Each resource requested by a web page, such as images, scripts, and stylesheets, requires a separate HTTP request. Minimising the number of HTTP requests can help to reduce the time it takes for a page to render.
  3. Prioritize critical content: Prioritizing critical content, such as above-the-fold content, can help to ensure that users see something on the screen quickly, even if the rest of the page is still loading.
  4. Reduce server response time: A slow server response time can significantly impact FCP. Optimizing server-side code and server settings can help to reduce response times and improve FCP.
  5. Use a performance monitoring tool: There are many tools available that can help you monitor your website’s performance, including FCP. These tools can help you identify performance issues and track your progress as you implement optimizations.
MobileDesktop
Score16%92%
Timing4.4 s0.9 s
Largest Contentful Paint

Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric

MobileDesktop
Score29%86%
Timing4.9 s1.3 s
Total Blocking Time

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.

MobileDesktop
Score79%97%
Timing300 ms100 ms
Cumulative Layout Shift

Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more about the Cumulative Layout Shift metric.

MobileDesktop
Score92%100%
Timing0.0890.002
Speed Index

Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric.

MobileDesktop
Score4%2%
Timing11.8 s5.3 s
Time to Interactive

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.

MobileDesktop
Score11%36%
Timing13.6 s5.3 s
Max Potential First Input Delay

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.

MobileDesktop
Score30%74%
Timing320 ms180 ms