Access forbikes.cz. 15. veletrh cyklistiky

name

value

score

weighting

FCP (First Contentful Paint)

Value7.5 s

1/100

10%

LCP (Largest Contentful Paint)

Value21.1 s

0/100

25%

SI (Speed Index)

Value12.0 s

4/100

10%

TBT (Total Blocking Time)

Value720 ms

41/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value17.5 s

4/100

10%

forbikes.cz

394 ms

forbikes.cz

509 ms

bootstrap.min.css

333 ms

bootstrap-theme.min.css

389 ms

font-awesome.min.css

410 ms

Our browser made a total of 97 requests to load all elements on the main page. We found that 46% of them (45 requests) were addressed to the original Forbikes.cz, 51% (49 requests) were made to Storage.abf.cz and 2% (2 requests) were made to Ifirmy.cz. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Storage.abf.cz.

Content Size

5.1 MB

After Optimization

4.2 MB

In fact, the total size of Forbikes.cz main page is 5.1 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. 55% of websites need less resources to load. Images take 4.0 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 79.1 kB

Original 92.6 kB
After minification 78.0 kB
After compression 13.6 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 14.7 kB, which is 16% 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 79.1 kB or 85% of the original size.

Image Optimization

-1%

Potential reduce by 34.7 kB

Original 4.0 MB
After minification 3.9 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. Forbikes images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 558.5 kB

Original 768.6 kB
After minification 708.1 kB
After compression 210.1 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 558.5 kB or 73% of the original size.

CSS Optimization

-82%

Potential reduce by 234.6 kB

Original 286.7 kB
After minification 258.3 kB
After compression 52.1 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. Forbikes.cz needs all CSS files to be minified and compressed as it can save up to 234.6 kB or 82% of the original size.

Requests Now

After Optimization

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Forbikes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 21 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

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

Image elements do not have [alt] attributes

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

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

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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

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 Forbikes.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 Forbikes.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

forbikes.cz

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

15. veletrh cyklistiky

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

forbikes.cz

forbikes.cz

bootstrap.min.css

bootstrap-theme.min.css

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

forbikes.cz

forbikes.cz

bootstrap.min.css

bootstrap-theme.min.css

font-awesome.min.css

jquery.min.js

bootstrap-datetimepicker.min.css

fullcalendar.css

bootstrap-toggle-buttons.css

bootstrap-responsive.css

jquery.gritter.css

sprites.css

lightGallery.css

caroufredsel.css

modal.css

sidebar_b3.css

js.css

responsive.css

katalog.css

rastr.css

layout_web_b3_2col.css

37.css

socket.io.slim.js

socket-global-error.js

bootstrap.min.js

bootstrap-datetimepicker.min.js

jquery.gritter.min.js

fullcalendar.min.js

jquery-ui-1.10.3.custom.min.js

jquery.caroufredsel.js

modal.js

jquery.sidebar.js

custom.js

underscore-min.js

ajax_menu.js

lightGallery.js

responsive.js

banner-front.css

menu-right.css

js.js

banner-front.js

show

gtm.js