Tools & Wizards About Us

Report Summary

  • 40

    Performance

    Renders faster than
    59% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 95

    SEO

    Google-friendlier than
    90% of websites

relatividad.org

relatividad.org, teoría de la relatividad, cosmología, y otros proyectos como libros online, matemáticas, bolsa, salud...

Page Load Speed

1.2 sec in total

First Response

140 ms

Resources Loaded

861 ms

Page Rendered

157 ms

About Website

Welcome to relatividad.org homepage info - get ready to check Re La Tividad best content for Spain right away, or after learning these important things about relatividad.org

Relatividad.org, web orientadas al estudio de la física, relatividad, agujeros negros, y albergue de otros proyectos web sobre matemáticas, bolsa, drivers y otros microblogs

Visit relatividad.org

Key Findings

We analyzed Relatividad.org page load time and found that the first response time was 140 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

relatividad.org performance score

40

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)

Value6.3 s

42/100

10%

TBT (Total Blocking Time)

Value1,320 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.209

59/100

15%

TTI (Time to Interactive)

Value11.3 s

19/100

10%

Network Requests Diagram

relatividad.org

140 ms

www.relatividad.org

121 ms

js

64 ms

estiloindice.css

42 ms

boilerplate.css

96 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 37% of them (13 requests) were addressed to the original Relatividad.org, 14% (5 requests) were made to Feed.mikle.com and 9% (3 requests) were made to Jf.revolvermaps.com. The less responsive or slowest element that took the longest time to load (397 ms) relates to the external source Pagead2.googlesyndication.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 34.4 kB (23%)

Content Size

146.8 kB

After Optimization

112.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Relatividad.org main page is 146.8 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. Javascripts take 61.2 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 20.4 kB

  • Original 28.6 kB
  • After minification 25.5 kB
  • After compression 8.2 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 3.0 kB, which is 11% 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 20.4 kB or 71% of the original size.

Image Optimization

-2%

Potential reduce by 999 B

  • Original 43.7 kB
  • After minification 42.7 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. Re La Tividad images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 1.7 kB

  • Original 61.2 kB
  • After minification 61.2 kB
  • After compression 59.5 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

-85%

Potential reduce by 11.3 kB

  • Original 13.3 kB
  • After minification 5.5 kB
  • After compression 2.0 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. Relatividad.org needs all CSS files to be minified and compressed as it can save up to 11.3 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (54%)

Requests Now

28

After Optimization

13

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Re La Tividad. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

relatividad.org accessibility score

77

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

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

relatividad.org best practices score

67

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

Page has valid source maps

SEO Factors

relatividad.org SEO score

95

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    ES

  • Language Claimed

    ES

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Relatividad.org 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 Relatividad.org 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 Re La Tividad. 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: