Tools & Wizards About Us
observerbooks.co.uk screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

observerbooks.co.uk

Stella & Rose's Books : Rare Books, Collectible Books & 2nd Hand OBSERVERS Books

Page Load Speed

3.6 sec in total

First Response

762 ms

Resources Loaded

2.2 sec

Page Rendered

637 ms

observerbooks.co.uk screenshot

About Website

Visit observerbooks.co.uk now to see the best up-to-date Observer Books content and also check out these interesting facts you probably never knew about observerbooks.co.uk

46 rare books, collectible books & second hand books listed in the "OBSERVERS" category.

Visit observerbooks.co.uk

Key Findings

We analyzed Observerbooks.co.uk page load time and found that the first response time was 762 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

observerbooks.co.uk performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

48/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

77/100

25%

SI (Speed Index)

Value5.4 s

56/100

10%

TBT (Total Blocking Time)

Value670 ms

45/100

30%

CLS (Cumulative Layout Shift)

Value0.028

100/100

15%

TTI (Time to Interactive)

Value9.4 s

30/100

10%

Network Requests Diagram

observers

762 ms

app.css

202 ms

css

34 ms

blue.css

344 ms

app.js

868 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Observerbooks.co.uk, 4% (1 request) were made to Fonts.googleapis.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1 sec) relates to the external source Stellabooks.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 128.1 kB (6%)

Content Size

2.1 MB

After Optimization

2.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Observerbooks.co.uk main page is 2.1 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. 40% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 72.0 kB

  • Original 85.9 kB
  • After minification 76.1 kB
  • After compression 13.9 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 9.8 kB, which is 11% 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 72.0 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 49.9 kB

  • Original 1.5 MB
  • After minification 1.4 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. Observer Books images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 5.5 kB

  • Original 536.1 kB
  • After minification 536.1 kB
  • After compression 530.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-2%

Potential reduce by 668 B

  • Original 44.1 kB
  • After minification 44.1 kB
  • After compression 43.5 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. Observerbooks.co.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 3 (13%)

Requests Now

23

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Observer 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 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

observers

observers

762 ms

app.css

app.css

202 ms

css

css

34 ms

blue.css

blue.css

344 ms

app.js

app.js

868 ms

js

js

68 ms

stella-and-roses-books.png

stella-and-roses-books.png

339 ms

stella-and-roses-books-64.png

stella-and-roses-books-64.png

338 ms

1327916.JPG

1327916.JPG

627 ms

1327915.JPG

1327915.JPG

736 ms

1827944.JPG

1827944.JPG

536 ms

1827943.JPG

1827943.JPG

636 ms

1827942.JPG

1827942.JPG

639 ms

1326135.JPG

1326135.JPG

834 ms

1325769.JPG

1325769.JPG

821 ms

1325724.JPG

1325724.JPG

834 ms

1824689.JPG

1824689.JPG

838 ms

1323652.JPG

1323652.JPG

841 ms

2140311.JPG

2140311.JPG

926 ms

1323051.JPG

1323051.JPG

1038 ms

icheck.min.js

icheck.min.js

935 ms

addthis_widget.js

addthis_widget.js

33 ms

bg.png

bg.png

687 ms

bg2.png

bg2.png

582 ms

wEO_EBrOk8hQLDvIAF81VvoP.ttf

wEO_EBrOk8hQLDvIAF81VvoP.ttf

19 ms

fa-solid-900.woff

fa-solid-900.woff

539 ms

fa-regular-400.woff

fa-regular-400.woff

598 ms

fa-brands-400.woff

fa-brands-400.woff

710 ms

Accessibility Review

observerbooks.co.uk accessibility score

85

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

High

Heading elements are not in a sequentially-descending order

Best Practices

observerbooks.co.uk best practices score

75

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

Missing source maps for large first-party JavaScript

SEO Factors

observerbooks.co.uk SEO score

81

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 doesn't use 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 Observerbooks.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 Observerbooks.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

observerbooks.co.uk

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