Access cz.johnlewis.com. John Lewis & Partners | Department Store

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value15.5 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value3,570 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value24.2 s

0/100

10%

www.johnlewis.com

266 ms

newrelic.js

20 ms

jl-init-metrics.6badcf8f.js

120 ms

Bootstrap.js

152 ms

entry.js

61 ms

Our browser made a total of 124 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Cz.johnlewis.com, 24% (30 requests) were made to Johnlewis.scene7.com and 1% (1 request) were made to Tags.johnlewis.com. The less responsive or slowest element that took the longest time to load (20 sec) relates to the external source Johnlewis.com.

Content Size

2.4 MB

After Optimization

1.7 MB

In fact, the total size of Cz.johnlewis.com main page is 2.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 577.1 kB

Original 625.9 kB
After minification 608.6 kB
After compression 48.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 577.1 kB or 92% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 1.5 MB
After minification 1.5 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Cz John Lewis images are well optimized though.

JavaScript Optimization

-46%

Potential reduce by 120.2 kB

Original 263.9 kB
After minification 263.9 kB
After compression 143.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 120.2 kB or 46% of the original size.

CSS Optimization

-46%

Potential reduce by 21.4 kB

Original 45.9 kB
After minification 45.8 kB
After compression 24.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Cz.johnlewis.com needs all CSS files to be minified and compressed as it can save up to 21.4 kB or 46% of the original size.

Requests Now

113

After Optimization

The browser has sent 113 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cz John Lewis. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 49 to 1 for JavaScripts and from 26 to 1 for CSS and as a result speed up the page load time.