Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 0

    Best Practices

  • 93

    SEO

    Google-friendlier than
    84% of websites

itesco.cz

Tesco Supermarkety | Clubcard, Letáky & Recepty | Tesco

Page Load Speed

8.3 sec in total

First Response

423 ms

Resources Loaded

7.1 sec

Page Rendered

715 ms

itesco.cz screenshot

About Website

Visit itesco.cz now to see the best up-to-date I Tesco content for Czech Republic and also check out these interesting facts you probably never knew about itesco.cz

Prolistujte si aktuální letáky Tesco, získejte skvělé slevy s Clubcard, objevte chutné recepty anebo vyřiďte svůj nákup online hned teď. Těšíme se na vás!

Visit itesco.cz

Key Findings

We analyzed Itesco.cz page load time and found that the first response time was 423 ms and then it took 7.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

itesco.cz performance score

18

Measured Metrics

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)

Value7.9 s

23/100

10%

TBT (Total Blocking Time)

Value4,490 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value18.2 s

3/100

10%

Network Requests Diagram

itesco.cz

423 ms

itesco.cz

444 ms

gtm.js

73 ms

63092.css

144 ms

63092.css

451 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 90% of them (70 requests) were addressed to the original Itesco.cz, 4% (3 requests) were made to Googletagmanager.com and 3% (2 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (5.5 sec) belongs to the original domain Itesco.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 923.2 kB (62%)

Content Size

1.5 MB

After Optimization

564.4 kB

In fact, the total size of Itesco.cz main page is 1.5 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. 45% of websites need less resources to load. Javascripts take 883.6 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 325.8 kB

  • Original 375.3 kB
  • After minification 369.5 kB
  • After compression 49.5 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 325.8 kB or 87% of the original size.

Image Optimization

-10%

Potential reduce by 22.1 kB

  • Original 223.4 kB
  • After minification 201.3 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. I Tesco images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 571.3 kB

  • Original 883.6 kB
  • After minification 883.6 kB
  • After compression 312.3 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 571.3 kB or 65% of the original size.

CSS Optimization

-75%

Potential reduce by 4.0 kB

  • Original 5.3 kB
  • After minification 4.0 kB
  • After compression 1.3 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. Itesco.cz needs all CSS files to be minified and compressed as it can save up to 4.0 kB or 75% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (36%)

Requests Now

67

After Optimization

43

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of I Tesco. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

itesco.cz accessibility score

87

Accessibility Issues

ARIA

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.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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

These items highlight common accessibility best practices.

Impact

Issue

High

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

SEO Factors

itesco.cz SEO score

93

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

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 Itesco.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 Itesco.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 I Tesco. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: