Tools & Wizards About Us
centrsna.by screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

centrsna.by

Медицинский центр «Центр здорового сна». Частный платный медцентр

Page Load Speed

6.8 sec in total

First Response

456 ms

Resources Loaded

5.3 sec

Page Rendered

1 sec

centrsna.by screenshot

About Website

Visit centrsna.by now to see the best up-to-date Centrsna content for Russia and also check out these interesting facts you probably never knew about centrsna.by

В многопрофильном частном медицинском центре «Центр здорового сна» в Минске работают высококвалифицированные специалисты. ✔Индивидуальный подход в платном медцентре

Visit centrsna.by

Key Findings

We analyzed Centrsna.by page load time and found that the first response time was 456 ms and then it took 6.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

centrsna.by performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.5 s

1/100

10%

LCP (Largest Contentful Paint)

Value9.6 s

0/100

25%

SI (Speed Index)

Value12.8 s

2/100

10%

TBT (Total Blocking Time)

Value5,530 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.04

99/100

15%

TTI (Time to Interactive)

Value24.1 s

0/100

10%

Network Requests Diagram

centrsna.by

456 ms

centrsna.by

1268 ms

script.js

48 ms

template_7689ee659e9a9097a1d95f18e41f7374_v1.css

676 ms

core.min.js

589 ms

Our browser made a total of 166 requests to load all elements on the main page. We found that 78% of them (130 requests) were addressed to the original Centrsna.by, 6% (10 requests) were made to Leadback.ru and 4% (6 requests) were made to Static.cloudim.ru. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Yastatic.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (13%)

Content Size

16.4 MB

After Optimization

14.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrsna.by main page is 16.4 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. Only a small number of websites need less resources to load. Images take 14.3 MB which makes up the majority of the site volume.

HTML Optimization

-63%

Potential reduce by 926.0 kB

  • Original 1.5 MB
  • After minification 1.2 MB
  • After compression 546.3 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. This page needs HTML code to be minified as it can gain 271.2 kB, which is 18% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 926.0 kB or 63% of the original size.

Image Optimization

-7%

Potential reduce by 1.0 MB

  • Original 14.3 MB
  • After minification 13.3 MB

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. Centrsna images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 77.7 kB

  • Original 410.4 kB
  • After minification 410.4 kB
  • After compression 332.7 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 77.7 kB or 19% of the original size.

CSS Optimization

-24%

Potential reduce by 39.9 kB

  • Original 168.2 kB
  • After minification 168.2 kB
  • After compression 128.3 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. Centrsna.by needs all CSS files to be minified and compressed as it can save up to 39.9 kB or 24% of the original size.

Requests Breakdown

Number of requests can be reduced by 42 (26%)

Requests Now

159

After Optimization

117

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 159 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrsna. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

centrsna.by

centrsna.by

456 ms

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1268 ms

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48 ms

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Subscribe_black.svg

Subscribe_black.svg

908 ms

Arrow_footer.svg

Arrow_footer.svg

896 ms

widget2.css

widget2.css

584 ms

ua-parser.min.js

ua-parser.min.js

679 ms

_chat_socket.min.js

_chat_socket.min.js

987 ms

watch.js

watch.js

1 ms

Close.svg

Close.svg

896 ms

arrow.png

arrow.png

102 ms

im_enter.png

im_enter.png

102 ms

cloudim-chat-label.png

cloudim-chat-label.png

99 ms

default.png

default.png

102 ms

leadback-chat-api.js

leadback-chat-api.js

202 ms

Accessibility Review

centrsna.by accessibility score

70

Accessibility Issues

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

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.

Best Practices

centrsna.by 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

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

centrsna.by SEO score

83

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

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

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

    RU

  • Language Claimed

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Centrsna.by can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Centrsna.by 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

centrsna.by

Open Graph data is detected on the main page of Centrsna. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: