Tools & Wizards About Us
student.delta-studenti.cz screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

student.delta-studenti.cz

E-learning: Střední škola informatiky a ekonomie Pardubice DELTA

Page Load Speed

3.1 sec in total

First Response

863 ms

Resources Loaded

2 sec

Page Rendered

228 ms

student.delta-studenti.cz screenshot

About Website

Visit student.delta-studenti.cz now to see the best up-to-date Student DELTA Studenti content for Czech Republic and also check out these interesting facts you probably never knew about student.delta-studenti.cz

Střední škola informatiky a ekonomie Pardubice DELTAe-learning Střední školy DELTAwww.DELTA-skola.cze-learningový server školy: DELTA - Střední škola informatiky a ekonomie, Pardubice

Visit student.delta-studenti.cz

Key Findings

We analyzed Student.delta-studenti.cz page load time and found that the first response time was 863 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

student.delta-studenti.cz performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

56/100

25%

SI (Speed Index)

Value5.3 s

58/100

10%

TBT (Total Blocking Time)

Value470 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.4 s

60/100

10%

Network Requests Diagram

student.delta-studenti.cz

863 ms

yui_combo.php

225 ms

yui_combo.php

556 ms

all

622 ms

javascript-static.js

230 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that 95% of them (20 requests) were addressed to the original Student.delta-studenti.cz, 5% (1 request) were made to Stredniskoly.cz. The less responsive or slowest element that took the longest time to load (863 ms) belongs to the original domain Student.delta-studenti.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 269.3 kB (66%)

Content Size

405.3 kB

After Optimization

136.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Student.delta-studenti.cz main page is 405.3 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 312.4 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 44.7 kB

  • Original 54.2 kB
  • After minification 53.8 kB
  • After compression 9.5 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 44.7 kB or 83% of the original size.

Image Optimization

-8%

Potential reduce by 2.8 kB

  • Original 34.7 kB
  • After minification 32.0 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. Student DELTA Studenti images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 218.8 kB

  • Original 312.4 kB
  • After minification 305.5 kB
  • After compression 93.5 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 218.8 kB or 70% of the original size.

CSS Optimization

-73%

Potential reduce by 3.0 kB

  • Original 4.0 kB
  • After minification 3.3 kB
  • After compression 1.1 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. Student.delta-studenti.cz needs all CSS files to be minified and compressed as it can save up to 3.0 kB or 73% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (45%)

Requests Now

20

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Student DELTA Studenti. 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

student.delta-studenti.cz

student.delta-studenti.cz

863 ms

yui_combo.php

yui_combo.php

225 ms

yui_combo.php

yui_combo.php

556 ms

all

all

622 ms

javascript-static.js

javascript-static.js

230 ms

require.min.js

require.min.js

119 ms

footer

footer

198 ms

microbar.gif

microbar.gif

356 ms

logolink_hor.png

logolink_hor.png

403 ms

moodlelogo

moodlelogo

109 ms

collapsed_empty

collapsed_empty

114 ms

expanded

expanded

116 ms

collapsed

collapsed

110 ms

yui_combo.php

yui_combo.php

117 ms

block_to_dock

block_to_dock

138 ms

first.js

first.js

159 ms

yui_combo.php

yui_combo.php

121 ms

jquery-private.js

jquery-private.js

119 ms

yui_combo.php

yui_combo.php

115 ms

jquery-1.11.2.min.js

jquery-1.11.2.min.js

127 ms

yui_combo.php

yui_combo.php

117 ms

Accessibility Review

student.delta-studenti.cz accessibility score

79

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

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

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

student.delta-studenti.cz best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

student.delta-studenti.cz SEO score

77

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

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Student.delta-studenti.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Student.delta-studenti.cz 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

student.delta-studenti.cz

Open Graph description is not detected on the main page of Student DELTA Studenti. 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: