Tools & Wizards About Us

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 47

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

libroscentral.com

Libreria Central. Venta de libros online. El lugar donde comprar libros de la forma mas facil

Page Load Speed

21.4 sec in total

First Response

304 ms

Resources Loaded

20.9 sec

Page Rendered

235 ms

About Website

Welcome to libroscentral.com homepage info - get ready to check Libros Central best content right away, or after learning these important things about libroscentral.com

Libreria Central. Libreria de Gijon desde donde podra comprar sus libros. Con una base de datos de todos los títulos publicados. Actualizada constantemente. Encuentre el libro que busca. Trabajamos co...

Visit libroscentral.com

Key Findings

We analyzed Libroscentral.com page load time and found that the first response time was 304 ms and then it took 21.1 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 was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

libroscentral.com performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value13.9 s

0/100

25%

SI (Speed Index)

Value4.1 s

79/100

10%

TBT (Total Blocking Time)

Value360 ms

72/100

30%

CLS (Cumulative Layout Shift)

Value0.508

16/100

15%

TTI (Time to Interactive)

Value12.5 s

14/100

10%

Network Requests Diagram

libroscentral.com

304 ms

ew.0.3.7.min.js

248 ms

ew.0.3.7.min.css

164 ms

estilo.css

165 ms

jquery.jcarousel.min.js

165 ms

Our browser made a total of 82 requests to load all elements on the main page. We found that 78% of them (64 requests) were addressed to the original Libroscentral.com, 12% (10 requests) were made to Static.xx.fbcdn.net and 2% (2 requests) were made to Scontent-iad3-1.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (20.3 sec) relates to the external source Tripadvisor.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 139.0 kB (12%)

Content Size

1.1 MB

After Optimization

999.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Libroscentral.com main page is 1.1 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. 60% of websites need less resources to load. Images take 970.8 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 47.5 kB

  • Original 57.4 kB
  • After minification 56.4 kB
  • After compression 9.9 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. 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 47.5 kB or 83% of the original size.

Image Optimization

-9%

Potential reduce by 89.6 kB

  • Original 970.8 kB
  • After minification 881.2 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. Libros Central images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 905 B

  • Original 103.9 kB
  • After minification 103.9 kB
  • After compression 103.0 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

-16%

Potential reduce by 985 B

  • Original 6.0 kB
  • After minification 6.0 kB
  • After compression 5.0 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. Libroscentral.com needs all CSS files to be minified and compressed as it can save up to 985 B or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (39%)

Requests Now

80

After Optimization

49

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Libros Central. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

libroscentral.com accessibility score

47

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

Form elements do not have associated labels

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

Best Practices

libroscentral.com 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

SEO Factors

libroscentral.com 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

    N/A

  • 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 Libroscentral.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Libroscentral.com 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 Libros Central. 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: