Tools & Wizards About Us
tverlib.ru screenshot

Report Summary

  • 11

    Performance

    Renders faster than
    24% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

tverlib.ru

Тверская областная универсальная научная библиотека им. А. М. Горького

Page Load Speed

24.9 sec in total

First Response

444 ms

Resources Loaded

23.6 sec

Page Rendered

771 ms

tverlib.ru screenshot

About Website

Welcome to tverlib.ru homepage info - get ready to check Tverlib best content for Russia right away, or after learning these important things about tverlib.ru

Тверская областная универсальная научная библиотека им. А. М. Горького

Visit tverlib.ru

Key Findings

We analyzed Tverlib.ru page load time and found that the first response time was 444 ms and then it took 24.4 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

tverlib.ru performance score

11

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

25/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value21.5 s

0/100

10%

TBT (Total Blocking Time)

Value3,790 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.247

50/100

15%

TTI (Time to Interactive)

Value37.7 s

0/100

10%

Network Requests Diagram

tverlib.ru

444 ms

125 ms

529 ms

764 ms

page_7604e6a0efb35f080e24408f692e7816_v1.css

388 ms

Our browser made a total of 191 requests to load all elements on the main page. We found that 16% of them (30 requests) were addressed to the original Tverlib.ru, 23% (43 requests) were made to St6-21.vk.com and 21% (41 requests) were made to I.mycdn.me. The less responsive or slowest element that took the longest time to load (19.6 sec) relates to the external source Stat.sputnik.ru.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.4 MB (20%)

Content Size

6.9 MB

After Optimization

5.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Tverlib.ru main page is 6.9 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 2.8 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 745.1 kB

  • Original 877.9 kB
  • After minification 618.6 kB
  • After compression 132.8 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 259.3 kB, which is 30% 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 745.1 kB or 85% of the original size.

Image Optimization

-7%

Potential reduce by 193.8 kB

  • Original 2.8 MB
  • After minification 2.6 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. Tverlib images are well optimized though.

JavaScript Optimization

-15%

Potential reduce by 391.8 kB

  • Original 2.6 MB
  • After minification 2.6 MB
  • After compression 2.2 MB

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 391.8 kB or 15% of the original size.

CSS Optimization

-13%

Potential reduce by 84.5 kB

  • Original 636.5 kB
  • After minification 636.5 kB
  • After compression 552.0 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. Tverlib.ru needs all CSS files to be minified and compressed as it can save up to 84.5 kB or 13% of the original size.

Requests Breakdown

Number of requests can be reduced by 88 (50%)

Requests Now

175

After Optimization

87

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 175 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tverlib. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 51 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tverlib.ru

tverlib.ru

444 ms

125 ms

529 ms

764 ms

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720 ms

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473 ms

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492 ms

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511 ms

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516 ms

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529 ms

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363 ms

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364 ms

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364 ms

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398 ms

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450 ms

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444 ms

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445 ms

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451 ms

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133 ms

legacy.support.js

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outer.support.js

outer.support.js

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spxl.gif

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1

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294 ms

Accessibility Review

tverlib.ru accessibility score

77

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

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

tverlib.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

tverlib.ru 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 Tverlib.ru 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 Tverlib.ru 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

tverlib.ru

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