Tools & Wizards About Us

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 56

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 0

    Best Practices

  • 58

    SEO

    Google-friendlier than
    21% of websites

centrolibri.it

Libri scolastica varia film dvd ingrosso cartolerie librerie - Centro Libri

Page Load Speed

6.1 sec in total

First Response

1.4 sec

Resources Loaded

4.4 sec

Page Rendered

288 ms

About Website

Welcome to centrolibri.it homepage info - get ready to check Centro Libri best content for Italy right away, or after learning these important things about centrolibri.it

Grossista da oltre trent�anni, Centro Libri si propone come partner ideale di librerie e cartolibrerie per la fornitura di testi scolastici e libri di varia di tutti gli editori.

Visit centrolibri.it

Key Findings

We analyzed Centrolibri.it page load time and found that the first response time was 1.4 sec and then it took 4.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

centrolibri.it performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

32/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

29/100

25%

SI (Speed Index)

Value5.4 s

56/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value5.9 s

66/100

10%

Network Requests Diagram

www2.centrolibri.it

1410 ms

stile.css

316 ms

cufon-yui.js

403 ms

Helvetica.js

603 ms

jquery-1.11.3.min.js

5 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Centrolibri.it, 17% (15 requests) were made to Centrolibri.becomitalia.com and 3% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Www2.centrolibri.it.

Page Optimization Overview & Recommendations

Page size can be reduced by 351.3 kB (13%)

Content Size

2.7 MB

After Optimization

2.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrolibri.it main page is 2.7 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 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 20.8 kB

  • Original 25.0 kB
  • After minification 19.9 kB
  • After compression 4.2 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 5.1 kB, which is 20% 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 20.8 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 9.5 kB

  • Original 2.3 MB
  • After minification 2.2 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. Centro Libri images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 310.5 kB

  • Original 451.7 kB
  • After minification 427.6 kB
  • After compression 141.2 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 310.5 kB or 69% of the original size.

CSS Optimization

-79%

Potential reduce by 10.5 kB

  • Original 13.2 kB
  • After minification 11.1 kB
  • After compression 2.8 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. Centrolibri.it needs all CSS files to be minified and compressed as it can save up to 10.5 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (39%)

Requests Now

87

After Optimization

53

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 87 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centro Libri. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 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

centrolibri.it accessibility score

56

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

Links do not have a discernible name

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

SEO Factors

centrolibri.it SEO score

58

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

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    IT

  • 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 Centrolibri.it can be misinterpreted by Google and other search engines. Our service has detected that Italian 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 Centrolibri.it 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 Centro Libri. 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: