Tools & Wizards About Us
edu-lib.net screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    35% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

edu-lib.net

Онлайн-библиотека| математика, экономика, информатика, химия

Page Load Speed

12.5 sec in total

First Response

4.4 sec

Resources Loaded

7.6 sec

Page Rendered

500 ms

edu-lib.net screenshot

About Website

Welcome to edu-lib.net homepage info - get ready to check Edu Lib best content for Russia right away, or after learning these important things about edu-lib.net

Научная и учебно-методическая литература онлайн по математике, экономике, информатике, химии. Учебники, справочники, сборники заданий для подготовки к ЕГЭ, ЗНО

Visit edu-lib.net

Key Findings

We analyzed Edu-lib.net page load time and found that the first response time was 4.4 sec and then it took 8.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

edu-lib.net performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value4.7 s

33/100

25%

SI (Speed Index)

Value17.8 s

0/100

10%

TBT (Total Blocking Time)

Value7,150 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.202

61/100

15%

TTI (Time to Interactive)

Value22.1 s

1/100

10%

Network Requests Diagram

edu-lib.net

4354 ms

reset.css

239 ms

defaults.css

252 ms

style.css

269 ms

pagenavi-css.css

280 ms

Our browser made a total of 150 requests to load all elements on the main page. We found that 34% of them (51 requests) were addressed to the original Edu-lib.net, 10% (15 requests) were made to Imgg.marketgid.com and 3% (5 requests) were made to Recreativ.ru. The less responsive or slowest element that took the longest time to load (4.4 sec) belongs to the original domain Edu-lib.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 480.0 kB (31%)

Content Size

1.5 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Edu-lib.net main page is 1.5 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. 55% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 134.0 kB

  • Original 163.3 kB
  • After minification 159.0 kB
  • After compression 29.3 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. 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 134.0 kB or 82% of the original size.

Image Optimization

-10%

Potential reduce by 96.8 kB

  • Original 1.0 MB
  • After minification 905.4 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. Edu Lib images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 205.0 kB

  • Original 305.1 kB
  • After minification 300.3 kB
  • After compression 100.1 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 205.0 kB or 67% of the original size.

CSS Optimization

-80%

Potential reduce by 44.1 kB

  • Original 55.2 kB
  • After minification 38.5 kB
  • After compression 11.1 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. Edu-lib.net needs all CSS files to be minified and compressed as it can save up to 44.1 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 57 (44%)

Requests Now

130

After Optimization

73

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 130 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Edu Lib. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 34 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

edu-lib.net

edu-lib.net

4354 ms

reset.css

reset.css

239 ms

defaults.css

defaults.css

252 ms

style.css

style.css

269 ms

pagenavi-css.css

pagenavi-css.css

280 ms

wpp.css

wpp.css

307 ms

sociable.css

sociable.css

312 ms

jquery.js

jquery.js

481 ms

jquery-migrate.min.js

jquery-migrate.min.js

370 ms

superfish.js

superfish.js

387 ms

jquery.mobilemenu.js

jquery.mobilemenu.js

402 ms

loader.js

loader.js

163 ms

momma.css

momma.css

412 ms

jquery-latest.js

jquery-latest.js

9 ms

clickpay.js

clickpay.js

586 ms

rcode.daa7aa404f.js

rcode.daa7aa404f.js

394 ms

rcode.e2d3404238.js

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396 ms

rcode.feec491d66.js

rcode.feec491d66.js

294 ms

bn.php

bn.php

197 ms

delay-loader.min.js

delay-loader.min.js

297 ms

bn.php

bn.php

203 ms

hoverIntent.min.js

hoverIntent.min.js

320 ms

wp-embed.min.js

wp-embed.min.js

404 ms

css

css

23 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

214 ms

fon_2.jpg

fon_2.jpg

461 ms

marketgid_add_link.png

marketgid_add_link.png

527 ms

banner_240x350.jpg

banner_240x350.jpg

851 ms

logo2.png

logo2.png

460 ms

Banner728x90New.jpg

Banner728x90New.jpg

494 ms

comments-big.png

comments-big.png

175 ms

date.png

date.png

452 ms

category.png

category.png

166 ms

Krylov_EGJe-2016_Informatika_Tip_jekz_var_2016.jpg

Krylov_EGJe-2016_Informatika_Tip_jekz_var_2016.jpg

532 ms

Glizburg_Algebra_10kl_Kontr_rab_uglubl_2014.jpg

Glizburg_Algebra_10kl_Kontr_rab_uglubl_2014.jpg

547 ms

Medvedev_EGJe-2016_Himija_Tip_test_zadan.jpg

Medvedev_EGJe-2016_Himija_Tip_test_zadan.jpg

556 ms

Glizburg_Algebra_-Kontrolnye_dlja-11_profilnyj-uroven_2008.jpg

Glizburg_Algebra_-Kontrolnye_dlja-11_profilnyj-uroven_2008.jpg

478 ms

Cvetkov_Sinteticheskie_vysokomolekuljarnye_veshhestva.jpg

Cvetkov_Sinteticheskie_vysokomolekuljarnye_veshhestva.jpg

517 ms

yurkov_safonova_voda.jpg

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603 ms

Shalinec_Provozvestniki_atomnogo_veka_1975.jpg

Shalinec_Provozvestniki_atomnogo_veka_1975.jpg

770 ms

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dobrotin_kislotah_i_solyah.jpg

770 ms

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Vse-domashnie-zadania-10-klass-130x190.jpg

659 ms

front1-130x190.jpg

front1-130x190.jpg

687 ms

Reshebnik_Kolmogorov_Algebra-i-nachala-analiza_11_-326-580_1-281-130x190.jpg

Reshebnik_Kolmogorov_Algebra-i-nachala-analiza_11_-326-580_1-281-130x190.jpg

688 ms

Vse_domashnie_zadania_11_klass-130x190.jpg

Vse_domashnie_zadania_11_klass-130x190.jpg

768 ms

Reshebnik_Alimov_Algebra-9kl_2001_62-476-130x190.jpg

Reshebnik_Alimov_Algebra-9kl_2001_62-476-130x190.jpg

799 ms

GDZ_Algebra_11kl_Zadachnik_Mordkovich_2011-130x190.jpg

GDZ_Algebra_11kl_Zadachnik_Mordkovich_2011-130x190.jpg

802 ms

Usi_shkilni_dom_zavd_8-130x190.jpg

Usi_shkilni_dom_zavd_8-130x190.jpg

810 ms

Vse-domashnie-zadaniya-03-klass-130x190.jpg

Vse-domashnie-zadaniya-03-klass-130x190.jpg

848 ms

23967-featured-40x60.jpg

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863 ms

34166-featured-40x60.jpg

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875 ms

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907 ms

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925 ms

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937 ms

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971 ms

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985 ms

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998 ms

31994-featured-40x60.jpg

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1033 ms

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1049 ms

rec_tr.css

rec_tr.css

100 ms

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436 ms

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444 ms

m

m

432 ms

tiz-25aSiItk2x.jpg

tiz-25aSiItk2x.jpg

435 ms

tiz-4210c84297.jpg

tiz-4210c84297.jpg

440 ms

edu-lib.net.45402.js

edu-lib.net.45402.js

545 ms

readmore-bg.png

readmore-bg.png

942 ms

rc.png

rc.png

326 ms

m

m

322 ms

edu-lib.net.37442.js

edu-lib.net.37442.js

542 ms

search.png

search.png

949 ms

edu-lib.net.21906.js

edu-lib.net.21906.js

539 ms

widgettitle-bg.png

widgettitle-bg.png

958 ms

tiz-G37mfFTZ6G.jpg

tiz-G37mfFTZ6G.jpg

386 ms

tiz-XAZdWOX5WD.jpg

tiz-XAZdWOX5WD.jpg

393 ms

m

m

295 ms

widget-list.png

widget-list.png

960 ms

tiz-25aSiItk2x.jpg

tiz-25aSiItk2x.jpg

296 ms

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300 ms

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300 ms

tiz-jfvuqUEoVu.jpg

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301 ms

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tiz-hQbftUT1Kc.jpg

300 ms

tiz-4210c84297.jpg

tiz-4210c84297.jpg

301 ms

hit

hit

290 ms

uid.php

uid.php

280 ms

fpx.php

fpx.php

484 ms

tk.php

tk.php

279 ms

484 ms

326 ms

jquery.fancybox.css

jquery.fancybox.css

133 ms

jquery.fancybox.pack.js

jquery.fancybox.pack.js

311 ms

affiliate-fancybox.css

affiliate-fancybox.css

310 ms

mtch.php

mtch.php

196 ms

mtch.php

mtch.php

191 ms

mtch.php

mtch.php

199 ms

dsp

dsp

454 ms

advmaker

advmaker

373 ms

rsc.php

rsc.php

491 ms

advmaker

advmaker

198 ms

dsp

dsp

795 ms

hit;Mgidohvat

hit;Mgidohvat

257 ms

1

1

405 ms

1

1

773 ms

1

1

785 ms

hit;Mgidohvat

hit;Mgidohvat

252 ms

hit;Mgidohvat

hit;Mgidohvat

261 ms

advmaker

advmaker

100 ms

bn1.php

bn1.php

444 ms

ambn.png

ambn.png

298 ms

sync.cgi

sync.cgi

263 ms

9668336_90x90.jpg

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528 ms

i.js

i.js

124 ms

ti

ti

270 ms

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526 ms

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531 ms

10305641_90x90.jpg

10305641_90x90.jpg

537 ms

widgets_marketgid.png

widgets_marketgid.png

268 ms

renegade-smart

renegade-smart

196 ms

pixel

pixel

16 ms

emily

emily

266 ms

audtd.png

audtd.png

567 ms

sync

sync

338 ms

sync

sync

270 ms

556d807310823b694772f699.js

556d807310823b694772f699.js

201 ms

pixel

pixel

16 ms

mui.gif

mui.gif

386 ms

id.gif

id.gif

388 ms

bn2.php

bn2.php

130 ms

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bn1.php

515 ms

sync.cgi

sync.cgi

142 ms

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134 ms

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252 ms

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243 ms

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256 ms

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270 ms

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382 ms

dispatch.fcgi

dispatch.fcgi

187 ms

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147 ms

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316 ms

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289 ms

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419 ms

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436 ms

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321 ms

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542 ms

pixel

pixel

37 ms

pixel.gif

pixel.gif

94 ms

admitad

admitad

246 ms

index.php

index.php

330 ms

edge.5.0.0.min.js

edge.5.0.0.min.js

195 ms

conflict_html5_video_600x200_edge.js

conflict_html5_video_600x200_edge.js

97 ms

Accessibility Review

edu-lib.net accessibility score

87

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

edu-lib.net best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Requests the notification permission on page load

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

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

edu-lib.net SEO score

92

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

    N/A

  • Language Claimed

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Edu-lib.net can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Russian. Our system also found out that Edu-lib.net 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

edu-lib.net

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