Access semantic-portal.net. Semantic portal | Semantic portal

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value4.7 s

68/100

10%

TBT (Total Blocking Time)

Value1,490 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value8.7 s

36/100

10%

semantic-portal.net

409 ms

css

45 ms

jquery.min.js

31 ms

ajax_client.js

119 ms

font-awesome.min.css

236 ms

Our browser made a total of 98 requests to load all elements on the main page. We found that 42% of them (41 requests) were addressed to the original Semantic-portal.net, 51% (50 requests) were made to Fonts.gstatic.com and 4% (4 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Semantic-portal.net.

Content Size

2.5 MB

After Optimization

1.8 MB

In fact, the total size of Semantic-portal.net main page is 2.5 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. 65% of websites need less resources to load. Images take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 53.8 kB

Original 64.7 kB
After minification 59.0 kB
After compression 10.9 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 53.8 kB or 83% of the original size.

Image Optimization

-28%

Potential reduce by 655.7 kB

Original 2.4 MB
After minification 1.7 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. Obviously, Semantic Portal needs image optimization as it can save up to 655.7 kB or 28% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 1.3 kB

Original 81.6 kB
After minification 81.5 kB
After compression 80.3 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

-20%

Potential reduce by 5.6 kB

Original 28.5 kB
After minification 28.0 kB
After compression 22.9 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. Semantic-portal.net needs all CSS files to be minified and compressed as it can save up to 5.6 kB or 20% of the original size.

Requests Now

After Optimization

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Semantic Portal. 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 JavaScripts and from 6 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

High

Some elements have a [tabindex] value greater than 0

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Page has valid source maps

Search Engine Optimization Advices

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/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Semantic-portal.net can be misinterpreted by Google and other search engines. Our service has detected that English 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 Semantic-portal.net 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

semantic-portal.net

Open Graph description is not detected on the main page of Semantic Portal. 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

Semantic portal | Semantic portal — learn smart!

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

semantic-portal.net

css

jquery.min.js

ajax_client.js

font-awesome.min.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

semantic-portal.net

css

jquery.min.js

ajax_client.js

font-awesome.min.css

st.css

less.css

highlight.pack.js

MathJax.js

default.css

menu.js

js

vis.min.js

vis.min.css

TeX-MML-AM_CHTML.js

roborubik_1.png

banner_image2_2.png

courses1.png

topics1.png

glossary1.png

main-personal-env.png

main-add-env.png

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