Tools & Wizards About Us

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

cvz.ru

Глазной центр в Москве | Лазерная коррекция зрения | Офтальмологическая клиника «Центр восстановления зрения»

Page Load Speed

5.5 sec in total

First Response

738 ms

Resources Loaded

4.3 sec

Page Rendered

506 ms

About Website

Click here to check amazing Cvz content for Russia. Otherwise, check out these important facts you probably never knew about cvz.ru

Глазная клиника при ФГБНУ НИИ глазных болезней РАМН «Центр восстановления зрения». Проводим лечение глазных заболеваний и лазерную коррекцию в Москве. Запишитесь в офтальмологический центр по телефону...

Visit cvz.ru

Key Findings

We analyzed Cvz.ru page load time and found that the first response time was 738 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

cvz.ru performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value4,390 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value20.8 s

2/100

10%

Network Requests Diagram

cvz.ru

738 ms

www.cvz.ru

1120 ms

style.css

285 ms

fonts.css

289 ms

jquery-1.7.1.min.js

789 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 91% of them (53 requests) were addressed to the original Cvz.ru, 3% (2 requests) were made to Google-analytics.com and 3% (2 requests) were made to Counter.yadro.ru. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Cvz.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 158.9 kB (24%)

Content Size

658.6 kB

After Optimization

499.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cvz.ru main page is 658.6 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. 25% of websites need less resources to load. Images take 454.4 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 16.3 kB

  • Original 22.3 kB
  • After minification 20.2 kB
  • After compression 6.0 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 16.3 kB or 73% of the original size.

Image Optimization

-5%

Potential reduce by 23.0 kB

  • Original 454.4 kB
  • After minification 431.5 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. Cvz images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 88.9 kB

  • Original 144.1 kB
  • After minification 129.7 kB
  • After compression 55.3 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 88.9 kB or 62% of the original size.

CSS Optimization

-81%

Potential reduce by 30.8 kB

  • Original 37.8 kB
  • After minification 32.8 kB
  • After compression 7.0 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. Cvz.ru needs all CSS files to be minified and compressed as it can save up to 30.8 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (17%)

Requests Now

54

After Optimization

45

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cvz. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

cvz.ru accessibility score

93

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.

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

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

High

Links do not have a discernible name

Best Practices

cvz.ru best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

cvz.ru 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

    RU

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1251

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cvz.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian 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 Cvz.ru main page’s claimed encoding is windows-1251. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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