Report Summary

  • 81

    Performance

    Renders faster than
    87% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    47% of websites

  • 58

    SEO

    Google-friendlier than
    30% of websites

senio.cz

Nadace Senio :: index

Page Load Speed

3.4 sec in total

First Response

1.4 sec

Resources Loaded

1.8 sec

Page Rendered

128 ms

senio.cz screenshot

About Website

Visit senio.cz now to see the best up-to-date Senio content and also check out these interesting facts you probably never knew about senio.cz

Visit senio.cz

Key Findings

We analyzed Senio.cz page load time and found that the first response time was 1.4 sec and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

senio.cz performance score

81

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.1 s

99/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value2.2 s

99/100

10%

TBT (Total Blocking Time)

Value790 ms

37/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.1 s

99/100

10%

Network Requests Diagram

senio.cz

1431 ms

reset.css

220 ms

typography.css

217 ms

ie.css

220 ms

259 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that all of those requests were addressed to Senio.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Senio.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 55.1 kB (56%)

Content Size

97.9 kB

After Optimization

42.8 kB

In fact, the total size of Senio.cz main page is 97.9 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. HTML takes 53.8 kB which makes up the majority of the site volume.

HTML Optimization

-56%

Potential reduce by 30.1 kB

  • Original 53.8 kB
  • After minification 53.4 kB
  • After compression 23.7 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 30.1 kB or 56% of the original size.

Image Optimization

-52%

Potential reduce by 18.7 kB

  • Original 36.1 kB
  • After minification 17.4 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. Obviously, Senio needs image optimization as it can save up to 18.7 kB or 52% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-78%

Potential reduce by 6.2 kB

  • Original 8.0 kB
  • After minification 4.1 kB
  • After compression 1.7 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. Senio.cz needs all CSS files to be minified and compressed as it can save up to 6.2 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (30%)

Requests Now

10

After Optimization

7

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Senio. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

senio.cz accessibility score

63

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Image elements do not have [alt] attributes

Best Practices

senio.cz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

senio.cz SEO score

58

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Senio.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Senio.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 description is not detected on the main page of Senio. 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: