Access bibliotecanacional.gov.co. Biblioteca Nacional de Colombia

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value15.3 s

0/100

25%

SI (Speed Index)

Value16.4 s

0/100

10%

TBT (Total Blocking Time)

Value11,560 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.475

18/100

15%

TTI (Time to Interactive)

Value58.9 s

0/100

10%

bibliotecanacional.gov.co

41 ms

bibliotecanacional.gov.co

1604 ms

es-co

199 ms

corev15.css

32 ms

corev15.css

52 ms

Our browser made a total of 129 requests to load all elements on the main page. We found that 86% of them (111 requests) were addressed to the original Bibliotecanacional.gov.co, 9% (11 requests) were made to Platform.twitter.com and 2% (2 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Syndication.twitter.com.

Content Size

5.5 MB

After Optimization

5.2 MB

In fact, the total size of Bibliotecanacional.gov.co main page is 5.5 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. Only a small number of websites need less resources to load. Images take 4.6 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 84.8 kB

Original 106.0 kB
After minification 90.6 kB
After compression 21.1 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 15.4 kB, which is 15% 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 84.8 kB or 80% of the original size.

Image Optimization

-4%

Potential reduce by 172.4 kB

Original 4.6 MB
After minification 4.5 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. Biblioteca Nacional images are well optimized though.

JavaScript Optimization

-12%

Potential reduce by 77.2 kB

Original 623.1 kB
After minification 623.0 kB
After compression 545.9 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 77.2 kB or 12% of the original size.

CSS Optimization

-20%

Potential reduce by 37.9 kB

Original 186.6 kB
After minification 186.4 kB
After compression 148.7 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. Bibliotecanacional.gov.co needs all CSS files to be minified and compressed as it can save up to 37.9 kB or 20% of the original size.

Requests Now

123

After Optimization

The browser has sent 123 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Biblioteca Nacional. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 44 to 1 for JavaScripts and from 32 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

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

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

Language and Encoding

Language Detected

ES
Language Claimed

ES
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Bibliotecanacional.gov.co can be misinterpreted by Google and other search engines. Our service has detected that Spanish is used on the page, and it matches the claimed language. Our system also found out that Bibliotecanacional.gov.co 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

bibliotecanacional.gov.co

Open Graph description is not detected on the main page of Biblioteca Nacional. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

Biblioteca Nacional de Colombia

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

bibliotecanacional.gov.co

bibliotecanacional.gov.co

es-co

corev15.css

corev15.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

bibliotecanacional.gov.co

bibliotecanacional.gov.co

es-co

corev15.css

corev15.css

all.css

swiper.min.css

swiper-bundle.min.css

materialize.min.css

bnc3.0.css

bnc_big_screen.css

bnc_small_screen.css

initstrings.js

init.js

theming.js

ScriptResource.axd

blank.js

ScriptResource.axd

jquery-3.5.1.min.js

materialize.min.js

swiper.min.js

rest.js

bnc_general.js

analitycs.js

WebResource.axd

bncinit.js

home_carrusell.js

jquery.SharePointFormSubmit.js

home_buscador_catalogos.js

home_noticias_bnc.js

bnc_home_tiles.js

home_destacados.bnc.js

jquery-ui.min.js

datepicker-es.js

home_agenda_bnc.js

jquery-ui.min.css

widgets.js

home_noticias_rnbp.js

home_videos.js

bnc_home_banners.js

aviso_emergente.js

css2

css2