Tools & Wizards About Us
cenum.pl screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

cenum.pl

Katalog monet, ceny monet kolekcjonerskich, monety obiegowe, snajper aukcyjny - Centrum numizmatyczne

Page Load Speed

3.8 sec in total

First Response

321 ms

Resources Loaded

3.1 sec

Page Rendered

359 ms

cenum.pl screenshot

About Website

Click here to check amazing Cenum content for Poland. Otherwise, check out these important facts you probably never knew about cenum.pl

Centrum numizmatyczne - serwis pozwalający zarządzać kolekcją numizmatów, posiada katalog monet wraz z aktualnymi informacjami na temat aukcyjnych cen monet

Visit cenum.pl

Key Findings

We analyzed Cenum.pl page load time and found that the first response time was 321 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

cenum.pl performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

7/100

10%

LCP (Largest Contentful Paint)

Value11.7 s

0/100

25%

SI (Speed Index)

Value7.2 s

29/100

10%

TBT (Total Blocking Time)

Value1,910 ms

8/100

30%

CLS (Cumulative Layout Shift)

Value0.081

94/100

15%

TTI (Time to Interactive)

Value13.0 s

13/100

10%

Network Requests Diagram

cenum.pl

321 ms

style.css

223 ms

jquery.ui.all.css

214 ms

jquery.min.js

21 ms

jquery-ui.min.js

436 ms

Our browser made a total of 154 requests to load all elements on the main page. We found that 82% of them (127 requests) were addressed to the original Cenum.pl, 4% (6 requests) were made to Pagead2.googlesyndication.com and 3% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (842 ms) belongs to the original domain Cenum.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 108.3 kB (10%)

Content Size

1.0 MB

After Optimization

935.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cenum.pl main page is 1.0 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. 60% of websites need less resources to load. Images take 613.3 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 56.0 kB

  • Original 69.6 kB
  • After minification 66.2 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. 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 56.0 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 11.9 kB

  • Original 613.3 kB
  • After minification 601.4 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. Cenum images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 34.1 kB

  • Original 328.0 kB
  • After minification 328.0 kB
  • After compression 293.9 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

-19%

Potential reduce by 6.2 kB

  • Original 32.8 kB
  • After minification 32.3 kB
  • After compression 26.5 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. Cenum.pl needs all CSS files to be minified and compressed as it can save up to 6.2 kB or 19% of the original size.

Requests Breakdown

Number of requests can be reduced by 48 (32%)

Requests Now

151

After Optimization

103

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 151 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cenum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cenum.pl

cenum.pl

321 ms

style.css

style.css

223 ms

jquery.ui.all.css

jquery.ui.all.css

214 ms

jquery.min.js

jquery.min.js

21 ms

jquery-ui.min.js

jquery-ui.min.js

436 ms

jquery.lazyload.mini.js

jquery.lazyload.mini.js

216 ms

jquery.toastmessage.js

jquery.toastmessage.js

218 ms

jquery.fancybox-1.3.4.pack.js

jquery.fancybox-1.3.4.pack.js

234 ms

jquery.filedrop.js

jquery.filedrop.js

320 ms

jquery.flot.js

jquery.flot.js

440 ms

jquery.flot.symbol.js

jquery.flot.symbol.js

327 ms

jquery.Jcrop.min.js

jquery.Jcrop.min.js

331 ms

page.js

page.js

337 ms

adsbygoogle.js

adsbygoogle.js

376 ms

jquery.ui.base.css

jquery.ui.base.css

215 ms

jquery.ui.theme.css

jquery.ui.theme.css

225 ms

jquery.ui.core.css

jquery.ui.core.css

110 ms

jquery.ui.resizable.css

jquery.ui.resizable.css

108 ms

jquery.ui.selectable.css

jquery.ui.selectable.css

112 ms

jquery.ui.accordion.css

jquery.ui.accordion.css

114 ms

jquery.ui.autocomplete.css

jquery.ui.autocomplete.css

119 ms

jquery.ui.button.css

jquery.ui.button.css

120 ms

jquery.ui.dialog.css

jquery.ui.dialog.css

214 ms

jquery.ui.slider.css

jquery.ui.slider.css

218 ms

jquery.ui.tabs.css

jquery.ui.tabs.css

223 ms

jquery.ui.datepicker.css

jquery.ui.datepicker.css

221 ms

jquery.ui.progressbar.css

jquery.ui.progressbar.css

226 ms

logo.png

logo.png

114 ms

mw_menu_separator.png

mw_menu_separator.png

111 ms

show_ads_impl.js

show_ads_impl.js

517 ms

splash.jpg

splash.jpg

431 ms

index_katalog.png

index_katalog.png

117 ms

index_kolekcja.png

index_kolekcja.png

123 ms

index_aukcje.png

index_aukcje.png

116 ms

index_indeksy.png

index_indeksy.png

145 ms

cat_147.png

cat_147.png

147 ms

cat_146.png

cat_146.png

219 ms

cat_200.png

cat_200.png

221 ms

cat_39.png

cat_39.png

227 ms

cat_31.png

cat_31.png

251 ms

cat_37.png

cat_37.png

257 ms

cat_38.png

cat_38.png

327 ms

cat_32.png

cat_32.png

329 ms

cat_33.png

cat_33.png

337 ms

cat_35.png

cat_35.png

357 ms

cat_36.png

cat_36.png

365 ms

cat_23.png

cat_23.png

435 ms

cat_21.png

cat_21.png

438 ms

cat_16.png

cat_16.png

447 ms

cat_17.png

cat_17.png

463 ms

cat_18.png

cat_18.png

472 ms

cat_15.png

cat_15.png

569 ms

cat_56.png

cat_56.png

570 ms

cat_7.png

cat_7.png

571 ms

cat_12.png

cat_12.png

571 ms

cat_8.png

cat_8.png

600 ms

cat_13.png

cat_13.png

601 ms

cat_41.png

cat_41.png

649 ms

cat_25.png

cat_25.png

650 ms

cat_26.png

cat_26.png

654 ms

cat_27.png

cat_27.png

668 ms

cat_28.png

cat_28.png

675 ms

cat_159.png

cat_159.png

691 ms

cat_178.png

cat_178.png

749 ms

analytics.js

analytics.js

13 ms

all.js

all.js

30 ms

cat_44.png

cat_44.png

719 ms

collect

collect

54 ms

cat_46.png

cat_46.png

706 ms

all.js

all.js

7 ms

collect

collect

34 ms

cat_47.png

cat_47.png

668 ms

cat_48.png

cat_48.png

665 ms

cat_49.png

cat_49.png

682 ms

cat_50.png

cat_50.png

716 ms

cat_171.png

cat_171.png

721 ms

cat_156.png

cat_156.png

657 ms

cat_155.png

cat_155.png

675 ms

cat_53.png

cat_53.png

666 ms

cat_153.png

cat_153.png

663 ms

cat_170.png

cat_170.png

711 ms

cat_175.png

cat_175.png

649 ms

cat_174.png

cat_174.png

660 ms

cat_184.png

cat_184.png

668 ms

cat_165.png

cat_165.png

649 ms

cat_168.png

cat_168.png

682 ms

cat_169.png

cat_169.png

842 ms

cat_60.png

cat_60.png

836 ms

cat_61.png

cat_61.png

834 ms

cat_79.png

cat_79.png

825 ms

cat_80.png

cat_80.png

810 ms

cat_83.png

cat_83.png

800 ms

cat_84.png

cat_84.png

704 ms

cat_86.png

cat_86.png

704 ms

cat_87.png

cat_87.png

703 ms

zrt_lookup.html

zrt_lookup.html

38 ms

ads

ads

465 ms

cat_127.png

cat_127.png

675 ms

cat_128.png

cat_128.png

675 ms

ads

ads

375 ms

cat_89.png

cat_89.png

665 ms

cat_90.png

cat_90.png

637 ms

cat_93.png

cat_93.png

654 ms

cat_94.png

cat_94.png

661 ms

cat_96.png

cat_96.png

669 ms

cat_97.png

cat_97.png

665 ms

cat_99.png

cat_99.png

817 ms

cat_108.png

cat_108.png

760 ms

cat_100.png

cat_100.png

753 ms

cat_109.png

cat_109.png

749 ms

cat_196.png

cat_196.png

732 ms

cat_101.png

cat_101.png

732 ms

cat_110.png

cat_110.png

714 ms

cat_181.png

cat_181.png

659 ms

cat_106.png

cat_106.png

748 ms

cat_112.png

cat_112.png

742 ms

cat_131.png

cat_131.png

725 ms

cat_132.png

cat_132.png

723 ms

cat_102.png

cat_102.png

705 ms

cat_111.png

cat_111.png

652 ms

cat_103.png

cat_103.png

651 ms

81023225b0f193d07d052e50ea38e692.js

81023225b0f193d07d052e50ea38e692.js

30 ms

load_preloaded_resource.js

load_preloaded_resource.js

58 ms

9fe8b22c2539940296c5f72a286520e3.js

9fe8b22c2539940296c5f72a286520e3.js

26 ms

abg_lite.js

abg_lite.js

58 ms

window_focus.js

window_focus.js

64 ms

qs_click_protection.js

qs_click_protection.js

80 ms

ufs_web_display.js

ufs_web_display.js

19 ms

e92e9b19fdbae9b3a3ef41360efccaf5.js

e92e9b19fdbae9b3a3ef41360efccaf5.js

56 ms

cat_113.png

cat_113.png

655 ms

cat_136.png

cat_136.png

642 ms

cat_138.png

cat_138.png

681 ms

s

s

23 ms

icon.png

icon.png

192 ms

cat_107.png

cat_107.png

650 ms

css

css

42 ms

cat_115.png

cat_115.png

449 ms

cat_105.png

cat_105.png

461 ms

cat_116.png

cat_116.png

482 ms

cat_137.png

cat_137.png

480 ms

cat_139.png

cat_139.png

515 ms

cat_104.png

cat_104.png

532 ms

cat_114.png

cat_114.png

551 ms

footbg.jpg

footbg.jpg

565 ms

facebook.png

facebook.png

584 ms

fancybox.png

fancybox.png

693 ms

fancybox-x.png

fancybox-x.png

623 ms

fancybox-y.png

fancybox-y.png

633 ms

blank.gif

blank.gif

645 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

32 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

43 ms

activeview

activeview

178 ms

EwGoFmJh85jiKfF-1zVyLpKT-mfRa9zDiFbQBwafAqI.js

EwGoFmJh85jiKfF-1zVyLpKT-mfRa9zDiFbQBwafAqI.js

42 ms

activeview

activeview

136 ms

Accessibility Review

cenum.pl 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

Best Practices

cenum.pl 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

Page has valid source maps

SEO Factors

cenum.pl 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

    PL

  • Language Claimed

    PL

  • Encoding

    UTF-8

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

cenum.pl

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