Report Summary

  • 28

    Performance

    Renders faster than
    49% of other websites

  • 43

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

barterbooks.co.uk

Barter Books

Page Load Speed

1.5 sec in total

First Response

262 ms

Resources Loaded

1.1 sec

Page Rendered

127 ms

barterbooks.co.uk screenshot

About Website

Click here to check amazing Barter Books content for United States. Otherwise, check out these important facts you probably never knew about barterbooks.co.uk

Barter Books

Visit barterbooks.co.uk

Key Findings

We analyzed Barterbooks.co.uk page load time and found that the first response time was 262 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

barterbooks.co.uk performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value7.1 s

5/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value2,240 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.8 s

13/100

10%

Network Requests Diagram

barterbooks.co.uk

262 ms

www.barterbooks.co.uk

328 ms

homepagestyle.css

77 ms

slideshow.css

153 ms

jquery.min.js

6 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 57% of them (17 requests) were addressed to the original Barterbooks.co.uk, 7% (2 requests) were made to S7.addthis.com and 7% (2 requests) were made to Seal.thawte.com. The less responsive or slowest element that took the longest time to load (328 ms) belongs to the original domain Barterbooks.co.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 649.2 kB (63%)

Content Size

1.0 MB

After Optimization

383.6 kB

In fact, the total size of Barterbooks.co.uk main page is 1.0 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. 30% of websites need less resources to load. Javascripts take 631.6 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 39.1 kB

  • Original 55.8 kB
  • After minification 50.6 kB
  • After compression 16.7 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 39.1 kB or 70% of the original size.

Image Optimization

-2%

Potential reduce by 2.2 kB

  • Original 92.8 kB
  • After minification 90.6 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. Barter Books images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 398.7 kB

  • Original 631.6 kB
  • After minification 628.7 kB
  • After compression 232.9 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 398.7 kB or 63% of the original size.

CSS Optimization

-83%

Potential reduce by 209.3 kB

  • Original 252.7 kB
  • After minification 250.3 kB
  • After compression 43.4 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. Barterbooks.co.uk needs all CSS files to be minified and compressed as it can save up to 209.3 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (27%)

Requests Now

26

After Optimization

19

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Barter Books. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

barterbooks.co.uk accessibility score

43

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.

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

barterbooks.co.uk best practices score

58

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

barterbooks.co.uk SEO score

62

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Barterbooks.co.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Barterbooks.co.uk main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Barter Books. 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: