Tools & Wizards About Us
odnb.odessa.ua screenshot

Report Summary

  • 79

    Performance

    Renders faster than
    85% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

odnb.odessa.ua

Одеська національна наукова бібліотека. Офіційний веб-сайт

Page Load Speed

2.8 sec in total

First Response

480 ms

Resources Loaded

2 sec

Page Rendered

274 ms

odnb.odessa.ua screenshot

About Website

Welcome to odnb.odessa.ua homepage info - get ready to check Odnb best content for Ukraine right away, or after learning these important things about odnb.odessa.ua

Найстаріша публічна бібліотека України, заснована в 1829 році, що володіє 5 млн документів більш ніж 100 мовами світу.

Visit odnb.odessa.ua

Key Findings

We analyzed Odnb.odessa.ua page load time and found that the first response time was 480 ms and then it took 2.3 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

odnb.odessa.ua performance score

79

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

80/100

25%

SI (Speed Index)

Value3.4 s

90/100

10%

TBT (Total Blocking Time)

Value310 ms

77/100

30%

CLS (Cumulative Layout Shift)

Value0.077

95/100

15%

TTI (Time to Interactive)

Value6.5 s

58/100

10%

Network Requests Diagram

odnb.odessa.ua

480 ms

default.css

200 ms

style_th.css

198 ms

style_clnd.css

200 ms

links.css

205 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 59% of them (34 requests) were addressed to the original Odnb.odessa.ua, 19% (11 requests) were made to Sinoptik.ua and 5% (3 requests) were made to I.bigmir.net. The less responsive or slowest element that took the longest time to load (535 ms) relates to the external source Counter.yadro.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 79.5 kB (22%)

Content Size

359.4 kB

After Optimization

279.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Odnb.odessa.ua main page is 359.4 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. 35% of websites need less resources to load. Images take 257.5 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 49.8 kB

  • Original 63.4 kB
  • After minification 50.4 kB
  • After compression 13.6 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. This page needs HTML code to be minified as it can gain 13.0 kB, which is 21% 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 49.8 kB or 78% of the original size.

Image Optimization

-10%

Potential reduce by 26.3 kB

  • Original 257.5 kB
  • After minification 231.3 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. Odnb images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 236 B

  • Original 26.2 kB
  • After minification 26.2 kB
  • After compression 25.9 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

-26%

Potential reduce by 3.2 kB

  • Original 12.3 kB
  • After minification 12.3 kB
  • After compression 9.1 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. Odnb.odessa.ua needs all CSS files to be minified and compressed as it can save up to 3.2 kB or 26% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (40%)

Requests Now

53

After Optimization

32

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Odnb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

odnb.odessa.ua

odnb.odessa.ua

480 ms

default.css

default.css

200 ms

style_th.css

style_th.css

198 ms

style_clnd.css

style_clnd.css

200 ms

links.css

links.css

205 ms

jquery.bxslider.min.css

jquery.bxslider.min.css

206 ms

header.css

header.css

206 ms

jquery.min.js

jquery.min.js

15 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

295 ms

footer.css

footer.css

298 ms

element.js

element.js

41 ms

informers_js.php

informers_js.php

199 ms

js

js

44 ms

vcss-blue

vcss-blue

47 ms

img01.jpg

img01.jpg

101 ms

header-background-2.jpg

header-background-2.jpg

205 ms

logo.svg

logo.svg

103 ms

home-greek-ornament.png

home-greek-ornament.png

205 ms

img08.gif

img08.gif

165 ms

dl.jpg

dl.jpg

170 ms

mkip.jpg

mkip.jpg

200 ms

1545-uryadova-liniya.jpg

1545-uryadova-liniya.jpg

205 ms

uba2024.jpg

uba2024.jpg

263 ms

0.jpg

0.jpg

271 ms

0.jpg

0.jpg

299 ms

0.jpg

0.jpg

306 ms

0.jpg

0.jpg

307 ms

0.jpg

0.jpg

308 ms

0.jpg

0.jpg

363 ms

0.jpg

0.jpg

373 ms

vcss-blue

vcss-blue

31 ms

informers_js.php

informers_js.php

355 ms

facebook.png

facebook.png

330 ms

youtube.png

youtube.png

339 ms

slideshare.png

slideshare.png

340 ms

twitter.png

twitter.png

342 ms

132px-Instagram_logo_2016.svg.png

132px-Instagram_logo_2016.svg.png

394 ms

banner02.jpg

banner02.jpg

406 ms

greek-ornament-gray-3.png

greek-ornament-gray-3.png

431 ms

informers2.css

informers2.css

92 ms

informers2.css

informers2.css

88 ms

hit

hit

267 ms

logo-t1.png

logo-t1.png

88 ms

hlc-t1.png

hlc-t1.png

177 ms

term-t2.png

term-t2.png

264 ms

s-informers-t2.png

s-informers-t2.png

456 ms

s-wind2.png

s-wind2.png

279 ms

frc-t1.png

frc-t1.png

279 ms

flc-t1.png

flc-t1.png

287 ms

c.bigmir.net

c.bigmir.net

376 ms

hit

hit

535 ms

b59_top.gif

b59_top.gif

353 ms

b59_center.gif

b59_center.gif

361 ms

b59_bottom.gif

b59_bottom.gif

361 ms

analytics.js

analytics.js

22 ms

bx_loader.gif

bx_loader.gif

106 ms

controls.png

controls.png

100 ms

collect

collect

23 ms

Accessibility Review

odnb.odessa.ua accessibility score

81

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

High

Links do not have a discernible name

Best Practices

odnb.odessa.ua best practices score

58

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

odnb.odessa.ua SEO score

58

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

Language and Encoding

  • Language Detected

    UK

  • Language Claimed

    UK

  • Encoding

    WINDOWS-1251

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

odnb.odessa.ua

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