Access slevy.heureka.cz. Heureka.cz - Porovnání cen a srovnání produktů z internetových obchodů

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value15.6 s

0/100

25%

SI (Speed Index)

Value11.9 s

4/100

10%

TBT (Total Blocking Time)

Value8,680 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.293

41/100

15%

TTI (Time to Interactive)

Value28.0 s

0/100

10%

slevy.heureka.cz

217 ms

slevy.heureka.cz

511 ms

www.heureka.cz

1174 ms

icons.js

75 ms

react.production.min.js

77 ms

Our browser made a total of 65 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Slevy.heureka.cz, 58% (38 requests) were made to Im9.cz and 15% (10 requests) were made to Cdn.heureka.group. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Heureka.cz.

Content Size

1.4 MB

After Optimization

778.2 kB

In fact, the total size of Slevy.heureka.cz main page is 1.4 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. 65% of websites need less resources to load. HTML takes 820.9 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 653.4 kB

Original 820.9 kB
After minification 820.5 kB
After compression 167.5 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 653.4 kB or 80% of the original size.

Image Optimization

-8%

Potential reduce by 17.7 kB

Original 209.9 kB
After minification 192.3 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. Slevy Heureka images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 89 B

Original 418.5 kB
After minification 418.5 kB
After compression 418.4 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. This website has mostly compressed JavaScripts.

Requests Now

After Optimization

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Slevy Heureka. 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 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

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

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 Slevy.heureka.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 Slevy.heureka.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

slevy.heureka.cz

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

Heureka.cz - Porovnání cen a srovnání produktů z internetových obchodů

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

slevy.heureka.cz

slevy.heureka.cz

www.heureka.cz

icons.js

react.production.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

slevy.heureka.cz

slevy.heureka.cz

www.heureka.cz

icons.js

react.production.min.js

react-dom.production.min.js

loader.js

lux.js

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