Tools & Wizards About Us
ibuk.pl screenshot

Report Summary

  • 47

    Performance

    Renders faster than
    67% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 96

    SEO

    Google-friendlier than
    91% of websites

ibuk.pl

Biblioteka internetowa PWN - wypożyczalnia online, ebooki - ibuk.pl

Page Load Speed

5.3 sec in total

First Response

423 ms

Resources Loaded

4.5 sec

Page Rendered

405 ms

ibuk.pl screenshot

About Website

Visit ibuk.pl now to see the best up-to-date Ibuk content for Poland and also check out these interesting facts you probably never knew about ibuk.pl

Największa internetowa wypożyczalnia online w Polsce. Wszystkie dziedziny nauk. Ponad 36 000 od PWN oraz 50 innych wydawców.

Visit ibuk.pl

Key Findings

We analyzed Ibuk.pl page load time and found that the first response time was 423 ms and then it took 4.9 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

ibuk.pl performance score

47

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

56/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

76/100

25%

SI (Speed Index)

Value6.4 s

41/100

10%

TBT (Total Blocking Time)

Value2,180 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.048

99/100

15%

TTI (Time to Interactive)

Value11.1 s

20/100

10%

Network Requests Diagram

ibuk.pl

423 ms

www.ibuk.pl

1139 ms

jquery.datetimepicker.css

200 ms

style.css

309 ms

nowe-style.css

210 ms

Our browser made a total of 156 requests to load all elements on the main page. We found that 62% of them (97 requests) were addressed to the original Ibuk.pl, 13% (20 requests) were made to Static.xx.fbcdn.net and 10% (16 requests) were made to Scontent-iad3-1.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Ibuk.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 374.0 kB (33%)

Content Size

1.1 MB

After Optimization

771.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ibuk.pl main page is 1.1 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. 70% of websites need less resources to load. Images take 817.7 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 104.0 kB

  • Original 118.1 kB
  • After minification 70.7 kB
  • After compression 14.0 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. This page needs HTML code to be minified as it can gain 47.4 kB, which is 40% 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 104.0 kB or 88% of the original size.

Image Optimization

-15%

Potential reduce by 124.7 kB

  • Original 817.7 kB
  • After minification 692.9 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. Obviously, Ibuk needs image optimization as it can save up to 124.7 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 145 B

  • Original 34.5 kB
  • After minification 34.5 kB
  • After compression 34.4 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

-83%

Potential reduce by 145.1 kB

  • Original 175.1 kB
  • After minification 139.6 kB
  • After compression 30.0 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. Ibuk.pl needs all CSS files to be minified and compressed as it can save up to 145.1 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 56 (39%)

Requests Now

142

After Optimization

86

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 142 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ibuk. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 38 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

ibuk.pl

ibuk.pl

423 ms

www.ibuk.pl

www.ibuk.pl

1139 ms

jquery.datetimepicker.css

jquery.datetimepicker.css

200 ms

style.css

style.css

309 ms

nowe-style.css

nowe-style.css

210 ms

common_classes.css

common_classes.css

325 ms

cookies.css

cookies.css

323 ms

jquery.rating.css

jquery.rating.css

301 ms

jquery-ui-1.8.19.custom.css

jquery-ui-1.8.19.custom.css

318 ms

jquery.selectBox.css

jquery.selectBox.css

324 ms

hint.css

hint.css

402 ms

imageflow.css

imageflow.css

409 ms

modernizr.custom.js

modernizr.custom.js

414 ms

jquery-1.7.2.js

jquery-1.7.2.js

641 ms

jquery-ui-1.8.19.js

jquery-ui-1.8.19.js

658 ms

swfobject.js

swfobject.js

431 ms

jquery.rating.js

jquery.rating.js

501 ms

useful_functions_set.js

useful_functions_set.js

509 ms

scripts.js

scripts.js

518 ms

login_box.js

login_box.js

536 ms

cupboard.js

cupboard.js

603 ms

jquery.selectBox.min.js

jquery.selectBox.min.js

611 ms

mg.min.js

mg.min.js

622 ms

jquery.transform.min.js

jquery.transform.min.js

655 ms

jquery.bez.min.js

jquery.bez.min.js

703 ms

jquery.validate.js

jquery.validate.js

714 ms

jquery.maskedinput-1.2.2.js

jquery.maskedinput-1.2.2.js

728 ms

facybox.js

facybox.js

743 ms

jquery.datetimepicker.js

jquery.datetimepicker.js

746 ms

imageflow.js

imageflow.js

752 ms

aapopup.css

aapopup.css

804 ms

aapopup.js

aapopup.js

814 ms

aapopupslider.js

aapopupslider.js

827 ms

conversion.js

conversion.js

15 ms

dc.js

dc.js

55 ms

fbevents.js

fbevents.js

134 ms

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607 ms

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1079 ms

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985 ms

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1095 ms

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1000 ms

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1000 ms

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799 ms

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906 ms

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555 ms

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644 ms

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646 ms

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648 ms

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658 ms

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659 ms

all.js

all.js

194 ms

38475.jpg

38475.jpg

653 ms

78 ms

__utm.gif

__utm.gif

14 ms

aller_rg-wf.woff

aller_rg-wf.woff

622 ms

cloud-load.gif

cloud-load.gif

633 ms

logoIbukNew.png

logoIbukNew.png

633 ms

logoIbukSearchContainerButton.png

logoIbukSearchContainerButton.png

662 ms

headerMenuCien.png

headerMenuCien.png

662 ms

leftarr.png

leftarr.png

663 ms

127 ms

80 ms

90 ms

www.ibuk.pl

www.ibuk.pl

814 ms

cookie-policy

cookie-policy

807 ms

aller_bd-wf.woff

aller_bd-wf.woff

609 ms

rightarr.png

rightarr.png

647 ms

categoryline.png

categoryline.png

647 ms

xd_arbiter.php

xd_arbiter.php

119 ms

xd_arbiter.php

xd_arbiter.php

249 ms

smallpromo.png

smallpromo.png

646 ms

bannershadow.png

bannershadow.png

620 ms

back_main_right_shadow.png

back_main_right_shadow.png

635 ms

back_main_right_shadow_bottom_end.png

back_main_right_shadow_bottom_end.png

635 ms

footerIbukLogo.png

footerIbukLogo.png

634 ms

afterCratBoxBeam.png

afterCratBoxBeam.png

718 ms

cloud.png

cloud.png

735 ms

fb_new.png

fb_new.png

640 ms

lp_2.png

lp_2.png

850 ms

slajd_1.png

slajd_1.png

708 ms

slajd_2.png

slajd_2.png

709 ms

slajd_3.png

slajd_3.png

716 ms

slajd_4.png

slajd_4.png

734 ms

aleft.png

aleft.png

643 ms

aright.png

aright.png

709 ms

icon-x.png

icon-x.png

201 ms

icon-v.png

icon-v.png

211 ms

ping

ping

60 ms

like_box.php

like_box.php

173 ms

like_box.php

like_box.php

111 ms

eBwTbg8G3cT.css

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160 ms

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197 ms

1RbJkZXL7GD.css

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235 ms

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308 ms

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344 ms

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281 ms

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285 ms

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330 ms

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435 ms

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431 ms

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330 ms

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430 ms

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466 ms

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434 ms

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431 ms

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431 ms

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487 ms

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215 ms

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204 ms

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205 ms

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206 ms

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203 ms

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205 ms

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207 ms

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198 ms

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98 ms

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40 ms

Accessibility Review

ibuk.pl accessibility score

75

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

High

[aria-hidden="true"] elements contain focusable descendents

High

[role]s are not contained by their required parent element

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

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

Some elements have a [tabindex] value greater than 0

Best Practices

ibuk.pl 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

ibuk.pl SEO score

96

Search Engine Optimization Advices

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

    PL

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ibuk.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it does not match the claimed English language. Our system also found out that Ibuk.pl 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

ibuk.pl

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