Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 38

    SEO

    Google-friendlier than
    18% of websites

bibliotecavirtual.clacso.org.ar

CLACSO - Red de Bibliotecas Virtuales

Page Load Speed

26 sec in total

First Response

10.9 sec

Resources Loaded

14.3 sec

Page Rendered

841 ms

bibliotecavirtual.clacso.org.ar screenshot

About Website

Click here to check amazing Bibliotecavirtual CLACSO content for Colombia. Otherwise, check out these important facts you probably never knew about bibliotecavirtual.clacso.org.ar

Visit bibliotecavirtual.clacso.org.ar

Key Findings

We analyzed Bibliotecavirtual.clacso.org.ar page load time and found that the first response time was 10.9 sec and then it took 15.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

bibliotecavirtual.clacso.org.ar performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value6.9 s

6/100

25%

SI (Speed Index)

Value13.7 s

1/100

10%

TBT (Total Blocking Time)

Value1,460 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.156

74/100

15%

TTI (Time to Interactive)

Value22.6 s

1/100

10%

Network Requests Diagram

bibliotecavirtual.clacso.org.ar

10877 ms

estilo_bordes.css

316 ms

textos.css

319 ms

solapas.css

317 ms

botones.css

320 ms

Our browser made a total of 87 requests to load all elements on the main page. We found that 77% of them (67 requests) were addressed to the original Bibliotecavirtual.clacso.org.ar, 8% (7 requests) were made to Bibliotecavirtual.clacso.edu.ar and 8% (7 requests) were made to Biblioteca.clacso.edu.ar. The less responsive or slowest element that took the longest time to load (10.9 sec) belongs to the original domain Bibliotecavirtual.clacso.org.ar.

Page Optimization Overview & Recommendations

Page size can be reduced by 177.8 kB (21%)

Content Size

863.0 kB

After Optimization

685.2 kB

In fact, the total size of Bibliotecavirtual.clacso.org.ar main page is 863.0 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. 30% of websites need less resources to load. Images take 773.3 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 34.4 kB

  • Original 41.0 kB
  • After minification 30.6 kB
  • After compression 6.6 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 10.4 kB, which is 25% 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 34.4 kB or 84% of the original size.

Image Optimization

-15%

Potential reduce by 115.2 kB

  • Original 773.3 kB
  • After minification 658.2 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. Obviously, Bibliotecavirtual CLACSO needs image optimization as it can save up to 115.2 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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

-90%

Potential reduce by 28.2 kB

  • Original 31.4 kB
  • After minification 25.5 kB
  • After compression 3.3 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. Bibliotecavirtual.clacso.org.ar needs all CSS files to be minified and compressed as it can save up to 28.2 kB or 90% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (9%)

Requests Now

79

After Optimization

72

The browser has sent 79 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bibliotecavirtual CLACSO. 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 CSS and as a result speed up the page load time.

Accessibility Review

bibliotecavirtual.clacso.org.ar accessibility score

63

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

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

High

<object> elements do not have alternate text

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

bibliotecavirtual.clacso.org.ar 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

High

Missing source maps for large first-party JavaScript

SEO Factors

bibliotecavirtual.clacso.org.ar SEO score

38

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

High

robots.txt is not valid

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

High

Document uses plugins

Language and Encoding

  • Language Detected

    ES

  • 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 Bibliotecavirtual.clacso.org.ar can be misinterpreted by Google and other search engines. Our service has detected that Spanish 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 Bibliotecavirtual.clacso.org.ar 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 Bibliotecavirtual CLACSO. 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: