Access cars.cz. CARS.CZ - nov? a ojet? auta, autobazary, autosalony, prodej vozidla

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value10.0 s

0/100

25%

SI (Speed Index)

Value14.1 s

1/100

10%

TBT (Total Blocking Time)

Value2,750 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.111

87/100

15%

TTI (Time to Interactive)

Value19.6 s

2/100

10%

cars.cz

387 ms

www.cars.cz

1136 ms

comp_default.css

478 ms

siteroot.jsp

193 ms

prototype.js

770 ms

Our browser made a total of 142 requests to load all elements on the main page. We found that 68% of them (96 requests) were addressed to the original Cars.cz, 20% (28 requests) were made to Img.cars.cz and 3% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Cars.cz.

Content Size

2.9 MB

After Optimization

1.5 MB

In fact, the total size of Cars.cz main page is 2.9 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. Javascripts take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 96.8 kB

Original 120.8 kB
After minification 117.1 kB
After compression 24.0 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 96.8 kB or 80% of the original size.

Image Optimization

-7%

Potential reduce by 68.0 kB

Original 936.6 kB
After minification 868.5 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. CARS images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 1.2 MB

Original 1.7 MB
After minification 1.5 MB
After compression 563.2 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 1.2 MB or 67% of the original size.

CSS Optimization

-82%

Potential reduce by 123.9 kB

Original 151.7 kB
After minification 136.5 kB
After compression 27.8 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. Cars.cz needs all CSS files to be minified and compressed as it can save up to 123.9 kB or 82% of the original size.

Requests Now

136

After Optimization

The browser has sent 136 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CARS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts 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 the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Links do not have a discernible name

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

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

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

High

robots.txt is not valid

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

N/A
Language Claimed

CS
Encoding

WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cars.cz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Czech. Our system also found out that Cars.cz main page’s claimed encoding is windows-1250. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

cars.cz

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

CARS.CZ - nov? a ojet? auta, autobazary, autosalony, prodej vozidla

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

cars.cz

www.cars.cz

comp_default.css

siteroot.jsp

prototype.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

cars.cz

www.cars.cz

comp_default.css

siteroot.jsp

prototype.js

scriptaculous.js

js_arrays_CZ.js

observer.js

searchformsupJS.js

centrum_generic.js

siteroot.jsp

code

builder.js

effects.js

dragdrop.js

controls.js

slider.js

sound.js

sashec.bundle.min.js

satelliteLib-a003dc427fcbca9cbed6b1243422062657b2a85b.js

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TOP5.png

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