Tools & Wizards About Us
od-os.ru screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

od-os.ru

«OD-OS» – интернет-ресурс для офтальмологов. Профессионально о зрении.

Page Load Speed

6.6 sec in total

First Response

1.1 sec

Resources Loaded

5.3 sec

Page Rendered

270 ms

od-os.ru screenshot

About Website

Click here to check amazing OD OS content for Russia. Otherwise, check out these important facts you probably never knew about od-os.ru

«OD-OS» информирует посетителей об инновациях в мире офтальмологии, объединяет ведущих специалистов, предоставляет доступ к самому большому каталогу офтальмологических учреждений России. Это уникальны...

Visit od-os.ru

Key Findings

We analyzed Od-os.ru page load time and found that the first response time was 1.1 sec and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

od-os.ru performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value1,760 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0.11

87/100

15%

TTI (Time to Interactive)

Value21.2 s

1/100

10%

Network Requests Diagram

od-os.ru

1061 ms

page_4213662de4715d4f03164c61cbbb60e3_12d636f213c9c2c0a551b77cdb0c506b.css

129 ms

kernel_main.css

525 ms

widgets.js

78 ms

kernel_main.js

1178 ms

Our browser made a total of 151 requests to load all elements on the main page. We found that 57% of them (86 requests) were addressed to the original Od-os.ru, 11% (16 requests) were made to Ulogin.ru and 8% (12 requests) were made to Counter.yadro.ru. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Od-os.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 894.1 kB (23%)

Content Size

4.0 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Od-os.ru main page is 4.0 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. 65% of websites need less resources to load. Images take 2.9 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 85.3 kB

  • Original 105.9 kB
  • After minification 100.3 kB
  • After compression 20.6 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 85.3 kB or 81% of the original size.

Image Optimization

-4%

Potential reduce by 123.6 kB

  • Original 2.9 MB
  • After minification 2.8 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. OD OS images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 349.7 kB

  • Original 517.4 kB
  • After minification 459.8 kB
  • After compression 167.8 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 349.7 kB or 68% of the original size.

CSS Optimization

-84%

Potential reduce by 335.5 kB

  • Original 401.6 kB
  • After minification 373.0 kB
  • After compression 66.1 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. Od-os.ru needs all CSS files to be minified and compressed as it can save up to 335.5 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 51 (38%)

Requests Now

135

After Optimization

84

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 135 CSS, Javascripts, AJAX and image requests in order to completely render the main page of OD OS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

od-os.ru

od-os.ru

1061 ms

page_4213662de4715d4f03164c61cbbb60e3_12d636f213c9c2c0a551b77cdb0c506b.css

page_4213662de4715d4f03164c61cbbb60e3_12d636f213c9c2c0a551b77cdb0c506b.css

129 ms

kernel_main.css

kernel_main.css

525 ms

widgets.js

widgets.js

78 ms

kernel_main.js

kernel_main.js

1178 ms

core_db.js

core_db.js

278 ms

core_frame_cache.js

core_frame_cache.js

292 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

658 ms

kernel_energosoft.js

kernel_energosoft.js

425 ms

jquery.sliderkit.1.4.min.js

jquery.sliderkit.1.4.min.js

404 ms

jquery.easing.1.3.min.js

jquery.easing.1.3.min.js

417 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

551 ms

sliderkit-core.css

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552 ms

sliderkit-demos.css

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559 ms

jquery.cycle.all.js

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769 ms

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653 ms

root.js

root.js

667 ms

smoothness.datepick.css

smoothness.datepick.css

680 ms

style.css

style.css

782 ms

odos.css

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794 ms

jquery.datepick.min.js

jquery.datepick.min.js

924 ms

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807 ms

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890 ms

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368 ms

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270 ms

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455 ms

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165 ms

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38 ms

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169 ms

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169 ms

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1550 ms

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846 ms

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907 ms

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943 ms

collect

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21 ms

small.png

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953 ms

upload.gif

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307 ms

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815 ms

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841 ms

circle-white.jpg

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995 ms

hit

hit

320 ms

button.0308b81ff1714e446f674b5b9793f2cd.js

button.0308b81ff1714e446f674b5b9793f2cd.js

135 ms

bx_stat

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313 ms

prev.jpg

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957 ms

widget_like.php

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301 ms

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343 ms

match

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363 ms

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822 ms

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1006 ms

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next.jpg

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930 ms

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927 ms

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1059 ms

like.php

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40 ms

blank.png

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1044 ms

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1185 ms

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70 ms

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41 ms

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573 ms

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23 ms

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42 ms

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68 ms

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71 ms

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1004 ms

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50 ms

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52 ms

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540 ms

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887 ms

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650 ms

Accessibility Review

od-os.ru accessibility score

65

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

od-os.ru best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

od-os.ru SEO score

69

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

    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 Od-os.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 Od-os.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

od-os.ru

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