Report Summary

  • 17

    Performance

    Renders faster than
    33% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 90

    SEO

    Google-friendlier than
    69% of websites

bookdepository.co.uk

Book Depository: Free delivery worldwide on over 20 million books

Page Load Speed

71.7 sec in total

First Response

383 ms

Resources Loaded

55 sec

Page Rendered

16.3 sec

bookdepository.co.uk screenshot

About Website

Click here to check amazing Book Depository content for United States. Otherwise, check out these important facts you probably never knew about bookdepository.co.uk

Book Depository is the world's most international online bookstore offering over 20 million books with free delivery worldwide.

Visit bookdepository.co.uk

Key Findings

We analyzed Bookdepository.co.uk page load time and found that the first response time was 383 ms and then it took 71.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

bookdepository.co.uk performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value6.0 s

13/100

25%

SI (Speed Index)

Value4.6 s

70/100

10%

TBT (Total Blocking Time)

Value1,960 ms

8/100

30%

CLS (Cumulative Layout Shift)

Value0.816

4/100

15%

TTI (Time to Interactive)

Value10.3 s

25/100

10%

Network Requests Diagram

bookdepository.co.uk

383 ms

www.bookdepository.com

1405 ms

8322250184.js

1386 ms

css

993 ms

common.css

6028 ms

Our browser made a total of 107 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Bookdepository.co.uk, 61% (65 requests) were made to D1w7fb2mkkr3kw.cloudfront.net and 17% (18 requests) were made to D3ogvdx946i4sr.cloudfront.net. The less responsive or slowest element that took the longest time to load (7.5 sec) relates to the external source M.media-amazon.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (51%)

Content Size

2.4 MB

After Optimization

1.2 MB

In fact, the total size of Bookdepository.co.uk 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. 70% of websites need less resources to load. Javascripts take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 367.0 kB

  • Original 408.3 kB
  • After minification 304.9 kB
  • After compression 41.3 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. This page needs HTML code to be minified as it can gain 103.4 kB, which is 25% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 367.0 kB or 90% of the original size.

Image Optimization

-2%

Potential reduce by 15.7 kB

  • Original 745.5 kB
  • After minification 729.9 kB

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. Book Depository images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 812.2 kB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 382.1 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 812.2 kB or 68% of the original size.

CSS Optimization

-75%

Potential reduce by 1.9 kB

  • Original 2.5 kB
  • After minification 2.1 kB
  • After compression 611 B

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. Bookdepository.co.uk needs all CSS files to be minified and compressed as it can save up to 1.9 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (17%)

Requests Now

98

After Optimization

81

The browser has sent 98 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Book Depository. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

bookdepository.co.uk accessibility score

83

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Names and labels

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.

Impact

Issue

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

bookdepository.co.uk best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

bookdepository.co.uk SEO score

90

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Mobile Friendly

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/).

Impact

Issue

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 Bookdepository.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 Bookdepository.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

Open Graph description is not detected on the main page of Book Depository. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: