Tools & Wizards About Us

Report Summary

  • 79

    Performance

    Renders faster than
    85% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 50

    SEO

    Google-friendlier than
    19% of websites

cosimobooks.com

Cosimo, a Specialty Publisher, presents books that inspire, inform, and engage readers worldwide.

Page Load Speed

20.7 sec in total

First Response

173 ms

Resources Loaded

20.3 sec

Page Rendered

212 ms

About Website

Visit cosimobooks.com now to see the best up-to-date Cosimo Books content and also check out these interesting facts you probably never knew about cosimobooks.com

Cosimo, a specialty publisher, presents literary treasures rediscovered, public reports that affect your world, and new books that inspire, inform, and engage readers worldwide.

Visit cosimobooks.com

Key Findings

We analyzed Cosimobooks.com page load time and found that the first response time was 173 ms and then it took 20.5 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

cosimobooks.com performance score

79

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

48/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value6.7 s

56/100

10%

Network Requests Diagram

cosimobooks.com

173 ms

estilo.css

22 ms

buttons.js

9 ms

function.js

22 ms

mm_css_menu.js

21 ms

Our browser made a total of 55 requests to load all elements on the main page. We found that 75% of them (41 requests) were addressed to the original Cosimobooks.com, 7% (4 requests) were made to Google.com and 4% (2 requests) were made to W.sharethis.com. The less responsive or slowest element that took the longest time to load (20.1 sec) relates to the external source Prodimage.images-bn.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 100.2 kB (19%)

Content Size

520.7 kB

After Optimization

420.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cosimobooks.com main page is 520.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 267.9 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 32.1 kB

  • Original 40.1 kB
  • After minification 33.7 kB
  • After compression 8.0 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 6.3 kB, which is 16% 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 32.1 kB or 80% of the original size.

Image Optimization

-8%

Potential reduce by 20.5 kB

  • Original 267.9 kB
  • After minification 247.4 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. Cosimo Books images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 3.5 kB

  • Original 160.3 kB
  • After minification 159.9 kB
  • After compression 156.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-84%

Potential reduce by 44.1 kB

  • Original 52.4 kB
  • After minification 35.6 kB
  • After compression 8.3 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. Cosimobooks.com needs all CSS files to be minified and compressed as it can save up to 44.1 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (56%)

Requests Now

43

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cosimo 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 from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

cosimobooks.com accessibility score

63

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.

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

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

High

<object> elements do not have alternate text

Best Practices

cosimobooks.com best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

cosimobooks.com SEO score

50

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

High

Document uses plugins

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    IS

  • Encoding

    LATIN1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cosimobooks.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Icelandic language. Our system also found out that Cosimobooks.com main page’s claimed encoding is latin1. 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 Cosimo 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: