Report Summary

  • 57

    Performance

    Renders faster than
    74% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

mendlak.cz

Mendelovo gymnázium v Opavě | Patříme k nejúspěšnějším školám v Moravskoslezském kraji

Page Load Speed

5.3 sec in total

First Response

354 ms

Resources Loaded

4.7 sec

Page Rendered

330 ms

mendlak.cz screenshot

About Website

Welcome to mendlak.cz homepage info - get ready to check Mendlak best content right away, or after learning these important things about mendlak.cz

V rozvojovém programu Excelence 2015 se naše škola umístila na  2. místě v kraji ! Ministerstvo školství v tomto programu hodnotí školy podle jejich úspěšnosti ve vybraných významných soutěžích v dané...

Visit mendlak.cz

Key Findings

We analyzed Mendlak.cz page load time and found that the first response time was 354 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

mendlak.cz performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value6.2 s

43/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.104

88/100

15%

TTI (Time to Interactive)

Value5.2 s

74/100

10%

Network Requests Diagram

mendlak.cz

354 ms

www.mgo.opava.cz

1353 ms

wp-emoji-release.min.js

353 ms

lightbox.css

238 ms

mediaelementplayer.css

357 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Mendlak.cz, 98% (56 requests) were made to Mgo.opava.cz. The less responsive or slowest element that took the longest time to load (2.1 sec) relates to the external source Mgo.opava.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 270.2 kB (20%)

Content Size

1.3 MB

After Optimization

1.1 MB

In fact, the total size of Mendlak.cz main page is 1.3 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. 35% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 26.9 kB

  • Original 35.8 kB
  • After minification 33.8 kB
  • After compression 9.0 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 26.9 kB or 75% of the original size.

Image Optimization

-4%

Potential reduce by 41.1 kB

  • Original 1.0 MB
  • After minification 981.0 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. Mendlak images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 159.4 kB

  • Original 229.7 kB
  • After minification 225.4 kB
  • After compression 70.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 159.4 kB or 69% of the original size.

CSS Optimization

-84%

Potential reduce by 42.8 kB

  • Original 50.9 kB
  • After minification 38.3 kB
  • After compression 8.1 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. Mendlak.cz needs all CSS files to be minified and compressed as it can save up to 42.8 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (24%)

Requests Now

55

After Optimization

42

The browser has sent 55 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mendlak. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

mendlak.cz accessibility score

91

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.

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

mendlak.cz best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

mendlak.cz SEO score

83

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 Mendlak.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 Mendlak.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

Open Graph data is detected on the main page of Mendlak. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: