Access trebesin.cz. Průmyslovka a Gymnázium Třebešín | Střední průmyslová škola, Praha 10, Na Třebešíně 2299 -

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value14.6 s

1/100

10%

TBT (Total Blocking Time)

Value3,250 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.737

6/100

15%

TTI (Time to Interactive)

Value36.5 s

0/100

10%

trebesin.cz

517 ms

www.trebesin.cz

1014 ms

gtm.js

73 ms

js

116 ms

fbevents.js

32 ms

Our browser made a total of 103 requests to load all elements on the main page. We found that 57% of them (59 requests) were addressed to the original Trebesin.cz, 10% (10 requests) were made to Youtube.com and 9% (9 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Trebesin.cz.

Content Size

6.5 MB

After Optimization

5.9 MB

In fact, the total size of Trebesin.cz main page is 6.5 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 5.6 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 154.6 kB

Original 175.9 kB
After minification 145.9 kB
After compression 21.2 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 30.0 kB, which is 17% 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 154.6 kB or 88% of the original size.

Image Optimization

-7%

Potential reduce by 422.2 kB

Original 5.6 MB
After minification 5.2 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. Trebesin images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 15.9 kB

Original 472.5 kB
After minification 472.5 kB
After compression 456.6 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

-7%

Potential reduce by 15.5 kB

Original 229.6 kB
After minification 229.3 kB
After compression 214.0 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. Trebesin.cz has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 89 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Trebesin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 27 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

ARIA input fields do not have accessible names

High

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

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 the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

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

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

High

Links are not crawlable

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

CS
Language Claimed

CS
Encoding

UTF-8

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

trebesin.cz

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

Průmyslovka a Gymnázium Třebešín | Střední průmyslová škola, Praha 10, Na Třebešíně 2299 - | Průmyslovka a Gymnázium Třebešín, Praha 10

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

trebesin.cz

www.trebesin.cz

gtm.js

js

fbevents.js

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

trebesin.cz

www.trebesin.cz

gtm.js

js

fbevents.js

front.css

bootstrap.min.css

bootstrap-responsive.css

favth-bootstrap.css

favtestimonials.css

all.css

css

css

css

style.css

favsliderpro.css

css

favimagehover.css

jquery.min.js

jquery-noconflict.js

jquery-migrate.min.js

caption.js

front.js

favth-bootstrap.js

viewportchecker.js

script.jquery.js

core.js

admin.css

cms.css

store.css

theme.css

style.css

style1.css

custom.css

css

css

css

favth-scripts.js

frontend.js

css

frontend.css

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intranet_m.png