Access duffermenswear.co.uk. JD Sports

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value54.2 s

0/100

25%

SI (Speed Index)

Value10.4 s

8/100

10%

TBT (Total Blocking Time)

Value850 ms

34/100

30%

CLS (Cumulative Layout Shift)

Value0.38

27/100

15%

TTI (Time to Interactive)

Value14.6 s

8/100

10%

www.jdsports.co.uk

47 ms

app.css

58 ms

polyfill.min.js

1901 ms

comp_4f943e5.css

131 ms

comp_dc45d19.css

144 ms

Our browser made a total of 87 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Duffermenswear.co.uk, 24% (21 requests) were made to Content-ssr1.cloud.jdplc.com and 15% (13 requests) were made to Jdsports.co.uk. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Polyfill-fastly.io.

Content Size

25.9 MB

After Optimization

25.0 MB

In fact, the total size of Duffermenswear.co.uk main page is 25.9 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. Only a small number of websites need less resources to load. Images take 24.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 274.6 kB

Original 327.4 kB
After minification 312.1 kB
After compression 52.8 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 274.6 kB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 21.0 kB

Original 24.5 MB
After minification 24.5 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. Duffermenswear images are well optimized though.

JavaScript Optimization

-17%

Potential reduce by 78.5 kB

Original 467.2 kB
After minification 466.2 kB
After compression 388.7 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 78.5 kB or 17% of the original size.

CSS Optimization

-85%

Potential reduce by 476.9 kB

Original 563.3 kB
After minification 563.3 kB
After compression 86.4 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. Duffermenswear.co.uk needs all CSS files to be minified and compressed as it can save up to 476.9 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duffermenswear. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

EN
Language Claimed

EN
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Duffermenswear.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Duffermenswear.co.uk main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

duffermenswear.co.uk

Open Graph data is detected on the main page of Duffermenswear. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

JD Sports | Shop Online Now

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

www.jdsports.co.uk

app.css

polyfill.min.js

comp_4f943e5.css

comp_dc45d19.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

www.jdsports.co.uk

app.css

polyfill.min.js

comp_4f943e5.css

comp_dc45d19.css

comp_73ccc50.css

comp_4316416.css

comp_5a0f85e.css

comp_7ce9f11.css

comp_5a80ad7.css

comp_64e8cb6.css

comp_c674bb5.js

comp_f03960a.js

comp_a4ebb05.js

comp_5fa27f1.js

comp_1c5da14.js

comp_0d1872d.js

comp_ae3ab2b.js

comp_fc50166.js

comp_37cb5d0.js

comp_8515299.js

comp_630977d.js

comp_106b552.js

navigation.css

navigation.js

ce-config.js

translations.js

app.js

d2tefupx1dneli.cloudfront.net

Bootstrap.js

lib.js

font-awesome.min.css

45PBY-33WND-3MSYT-ENWG6-RJANS

globalicon-20x13-700f5f7fe1dcfead6664368748c87f4c

logo-dark.png

desktop-middle-banner-1704x740-029ca200dd30119b4494de93cc7dfcf8

logo-large-en-dark.png

mic.png

preload-black.gif

preload-white.gif

icn-close.svg

desktop-top-banner-1920x840-5e522acf547d298bf2cf45da1e5295b0

desktop-top-banner-1920x840-home-1-min-1f36112f6fb257741718e01e1e5842c8