Tools & Wizards About Us
dobiasova.cz screenshot

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 91

    SEO

    Google-friendlier than
    71% of websites

dobiasova.cz

ZŠ Dobiášova - Úvod

Page Load Speed

3.9 sec in total

First Response

771 ms

Resources Loaded

2.8 sec

Page Rendered

264 ms

dobiasova.cz screenshot

About Website

Visit dobiasova.cz now to see the best up-to-date Dobiasova content and also check out these interesting facts you probably never knew about dobiasova.cz

Základní škola Dobiášova, Liberec

Visit dobiasova.cz

Key Findings

We analyzed Dobiasova.cz page load time and found that the first response time was 771 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

dobiasova.cz performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

13/100

10%

LCP (Largest Contentful Paint)

Value26.4 s

0/100

25%

SI (Speed Index)

Value9.9 s

10/100

10%

TBT (Total Blocking Time)

Value330 ms

75/100

30%

CLS (Cumulative Layout Shift)

Value0.231

54/100

15%

TTI (Time to Interactive)

Value16.9 s

5/100

10%

Network Requests Diagram

dobiasova.cz

771 ms

ic_rounded_style.css

353 ms

mootools-core.js

600 ms

core.js

360 ms

caption.js

243 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 93% of them (37 requests) were addressed to the original Dobiasova.cz, 5% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Dobiasova.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 470.6 kB (49%)

Content Size

956.5 kB

After Optimization

485.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dobiasova.cz main page is 956.5 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 506.6 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 22.7 kB

  • Original 28.7 kB
  • After minification 27.4 kB
  • After compression 6.0 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 22.7 kB or 79% of the original size.

Image Optimization

-22%

Potential reduce by 78.2 kB

  • Original 361.1 kB
  • After minification 282.9 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, Dobiasova needs image optimization as it can save up to 78.2 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-63%

Potential reduce by 318.2 kB

  • Original 506.6 kB
  • After minification 498.6 kB
  • After compression 188.4 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 318.2 kB or 63% of the original size.

CSS Optimization

-86%

Potential reduce by 51.5 kB

  • Original 60.1 kB
  • After minification 43.3 kB
  • After compression 8.6 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. Dobiasova.cz needs all CSS files to be minified and compressed as it can save up to 51.5 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (59%)

Requests Now

39

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dobiasova. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dobiasova.cz

dobiasova.cz

771 ms

ic_rounded_style.css

ic_rounded_style.css

353 ms

mootools-core.js

mootools-core.js

600 ms

core.js

core.js

360 ms

caption.js

caption.js

243 ms

swfobject.js

swfobject.js

410 ms

mooquee.js

mooquee.js

383 ms

mootools-more.js

mootools-more.js

1104 ms

jquery.min.js

jquery.min.js

68 ms

right_function.js

right_function.js

470 ms

function.js

function.js

476 ms

system.css

system.css

515 ms

general.css

general.css

647 ms

template.css

template.css

707 ms

jquery.js

jquery.js

970 ms

script.js

script.js

764 ms

system.css

system.css

121 ms

ga.js

ga.js

41 ms

Bottom_texture.jpg

Bottom_texture.jpg

240 ms

Middle_texture.jpg

Middle_texture.jpg

244 ms

Top_texture.jpg

Top_texture.jpg

486 ms

page_gl.png

page_gl.png

240 ms

sheet.png

sheet.png

132 ms

header-object.png

header-object.png

475 ms

nav.png

nav.png

244 ms

menuitem.png

menuitem.png

466 ms

spacer.gif

spacer.gif

357 ms

subitem.png

subitem.png

361 ms

block_b.png

block_b.png

364 ms

block_t.png

block_t.png

477 ms

block.png

block.png

483 ms

email.png

email.png

620 ms

rozvrhy.png

rozvrhy.png

716 ms

suplovani.png

suplovani.png

725 ms

jidlo.png

jidlo.png

733 ms

foto.png

foto.png

720 ms

get_flash_player.gif

get_flash_player.gif

701 ms

__utm.gif

__utm.gif

34 ms

button.png

button.png

780 ms

footer.png

footer.png

762 ms

Accessibility Review

dobiasova.cz accessibility score

91

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-hidden="true"] elements contain focusable descendents

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

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

Links do not have a discernible name

Best Practices

dobiasova.cz best practices score

75

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

dobiasova.cz SEO score

91

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dobiasova.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 Dobiasova.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

dobiasova.cz

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