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maestro.cz screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

maestro.cz

Mastercard | A World Beyond Cash | Leader in Global Digital Payment Solutions & Technology

Page Load Speed

2.9 sec in total

First Response

470 ms

Resources Loaded

2.1 sec

Page Rendered

268 ms

maestro.cz screenshot

About Website

Welcome to maestro.cz homepage info - get ready to check Maestro best content right away, or after learning these important things about maestro.cz

Mastercard is a leader in global payments and a technology company that connects billions of consumers, thousand of financial institutions, and millions of merchants, as well as governments and busine...

Visit maestro.cz

Key Findings

We analyzed Maestro.cz page load time and found that the first response time was 470 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

maestro.cz performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.0 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.5 s

0/100

25%

SI (Speed Index)

Value27.8 s

0/100

10%

TBT (Total Blocking Time)

Value13,570 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.016

100/100

15%

TTI (Time to Interactive)

Value24.8 s

0/100

10%

Network Requests Diagram

maestro.cz

470 ms

maestro.html

298 ms

cs-cz.html

297 ms

dxp-web.js

526 ms

dxp-web.esm.js

257 ms

Our browser made a total of 9 requests to load all elements on the main page. We found that 11% of them (1 request) were addressed to the original Maestro.cz, 33% (3 requests) were made to Mastercard.cz and 22% (2 requests) were made to Asset.mastercard.com. The less responsive or slowest element that took the longest time to load (526 ms) relates to the external source Asset.mastercard.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 35.9 kB (31%)

Content Size

114.6 kB

After Optimization

78.7 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Maestro.cz main page is 114.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 69.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 35.6 kB

  • Original 44.6 kB
  • After minification 43.3 kB
  • After compression 9.0 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 35.6 kB or 80% of the original size.

JavaScript Optimization

-0%

Potential reduce by 85 B

  • Original 69.6 kB
  • After minification 69.6 kB
  • After compression 69.5 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

-55%

Potential reduce by 194 B

  • Original 355 B
  • After minification 269 B
  • After compression 161 B

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. Maestro.cz needs all CSS files to be minified and compressed as it can save up to 194 B or 55% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (67%)

Requests Now

6

After Optimization

2

  • JavaScript
  • CSS

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Maestro. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

maestro.cz

maestro.cz

470 ms

maestro.html

maestro.html

298 ms

cs-cz.html

cs-cz.html

297 ms

dxp-web.js

dxp-web.js

526 ms

dxp-web.esm.js

dxp-web.esm.js

257 ms

clientlib-base.43aa419b7d2da62409c28aef62d88dd5.css

clientlib-base.43aa419b7d2da62409c28aef62d88dd5.css

96 ms

clientlib-base.16b996c20f1af71dec4f413b345b75c0.js

clientlib-base.16b996c20f1af71dec4f413b345b75c0.js

95 ms

otSDKStub.js

otSDKStub.js

147 ms

launch-EN5f9e0c4944554f7e9f3947196ae7c30f.min.js

launch-EN5f9e0c4944554f7e9f3947196ae7c30f.min.js

183 ms

Accessibility Review

maestro.cz accessibility score

83

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-*] attributes do not have valid values

High

ARIA IDs are not unique

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

maestro.cz best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

maestro.cz SEO score

91

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Maestro.cz can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Czech language. Our system also found out that Maestro.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

maestro.cz

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