Tools & Wizards About Us
4developers.org.pl screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

4developers.org.pl

4Developers – Interdyscyplinarny festiwal technologiczny dla programistów w Polsce!

Page Load Speed

8.2 sec in total

First Response

2 sec

Resources Loaded

5.4 sec

Page Rendered

789 ms

4developers.org.pl screenshot

About Website

Click here to check amazing 4Developers content for Poland. Otherwise, check out these important facts you probably never knew about 4developers.org.pl

Konferencja 4Developers otwiera drzwi do świata programowania, testowania i innowacji. To wydarzenie, podczas którego spotkają się eksperci i pasjonaci.

Visit 4developers.org.pl

Key Findings

We analyzed 4developers.org.pl page load time and found that the first response time was 2 sec and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

4developers.org.pl performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.0 s

0/100

25%

SI (Speed Index)

Value15.9 s

0/100

10%

TBT (Total Blocking Time)

Value1,010 ms

27/100

30%

CLS (Cumulative Layout Shift)

Value0.283

43/100

15%

TTI (Time to Interactive)

Value24.8 s

0/100

10%

Network Requests Diagram

4developers.org.pl

1989 ms

4developers.org.pl

1094 ms

js

61 ms

js

55 ms

4developers.org.pl

782 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 74% of them (64 requests) were addressed to the original 4developers.org.pl, 6% (5 requests) were made to Salesmanago.pl and 5% (4 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain 4developers.org.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 115.0 kB (49%)

Content Size

233.8 kB

After Optimization

118.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 4developers.org.pl main page is 233.8 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. 65% of websites need less resources to load. HTML takes 124.8 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 102.0 kB

  • Original 124.8 kB
  • After minification 116.8 kB
  • After compression 22.8 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. 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 102.0 kB or 82% of the original size.

Image Optimization

-47%

Potential reduce by 6.1 kB

  • Original 13.1 kB
  • After minification 7.0 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, 4Developers needs image optimization as it can save up to 6.1 kB or 47% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-7%

Potential reduce by 6.1 kB

  • Original 91.8 kB
  • After minification 91.8 kB
  • After compression 85.8 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

-18%

Potential reduce by 746 B

  • Original 4.0 kB
  • After minification 4.0 kB
  • After compression 3.3 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. 4developers.org.pl needs all CSS files to be minified and compressed as it can save up to 746 B or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (43%)

Requests Now

81

After Optimization

46

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 4Developers. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

4developers.org.pl

4developers.org.pl

1989 ms

4developers.org.pl

4developers.org.pl

1094 ms

js

js

61 ms

js

js

55 ms

4developers.org.pl

4developers.org.pl

782 ms

style.min.css

style.min.css

749 ms

styles.css

styles.css

379 ms

font-awesome.min.css

font-awesome.min.css

503 ms

ea-style.css

ea-style.css

381 ms

font-awesome.min.css

font-awesome.min.css

504 ms

swiper-bundle.css

swiper-bundle.css

628 ms

style.css

style.css

629 ms

style.min.css

style.min.css

998 ms

analytics.js

analytics.js

4 ms

collect

collect

16 ms

theme.bundle.min.css

theme.bundle.min.css

795 ms

frontend-gtag.js

frontend-gtag.js

679 ms

jquery.min.js

jquery.min.js

932 ms

jquery-migrate.min.js

jquery-migrate.min.js

800 ms

tti5kas.css

tti5kas.css

127 ms

ninja-slider.css

ninja-slider.css

805 ms

collect

collect

28 ms

ninja-slider.js

ninja-slider.js

703 ms

jquery-3.5.1.js

jquery-3.5.1.js

24 ms

move.js

move.js

1463 ms

companion.bundle.min.js

companion.bundle.min.js

822 ms

index.js

index.js

821 ms

index.js

index.js

822 ms

imagesloaded.min.js

imagesloaded.min.js

832 ms

masonry.min.js

masonry.min.js

940 ms

theme.bundle.min.js

theme.bundle.min.js

1103 ms

scripts.js

scripts.js

940 ms

swiper-bundle.js

swiper-bundle.js

1311 ms

p.css

p.css

36 ms

gtm.js

gtm.js

45 ms

companion.bundle.min.css

companion.bundle.min.css

148 ms

css

css

32 ms

4developers_logo_dark.png

4developers_logo_dark.png

159 ms

4developers_logo_light.png

4developers_logo_light.png

242 ms

4dev_fav.png

4dev_fav.png

243 ms

wawa_btn_2023.png

wawa_btn_2023.png

297 ms

katowice_btn_satelita.png

katowice_btn_satelita.png

298 ms

poznan_btn_satelita.png

poznan_btn_satelita.png

331 ms

wroclaw_btn_satelita.png

wroclaw_btn_satelita.png

330 ms

lodz_btn_satelita.png

lodz_btn_satelita.png

330 ms

insight.min.js

insight.min.js

47 ms

collect

collect

40 ms

destination

destination

122 ms

font

font

107 ms

4dev-2024-btn-main.png

4dev-2024-btn-main.png

248 ms

bilet_btn_2023.png

bilet_btn_2023.png

258 ms

agenda_btn_2024.png

agenda_btn_2024.png

319 ms

marka_light.png

marka_light.png

321 ms

agendaiznizka.png

agendaiznizka.png

691 ms

blog.png

blog.png

750 ms

Bez-nazwy-1.png

Bez-nazwy-1.png

878 ms

mapka1.png

mapka1.png

445 ms

2.jpg

2.jpg

598 ms

dlacze-wart-zostac-prelegentem.jpg

dlacze-wart-zostac-prelegentem.jpg

569 ms

4.jpg

4.jpg

594 ms

1.jpg

1.jpg

704 ms

odpal-jesien.png

odpal-jesien.png

721 ms

4dev-news-agenda-katowice.jpg

4dev-news-agenda-katowice.jpg

729 ms

wiecej_galeria.png

wiecej_galeria.png

820 ms

proidea_logo_footer.png

proidea_logo_footer.png

834 ms

4dev_baner_satelity_2023.jpg

4dev_baner_satelity_2023.jpg

836 ms

collect

collect

85 ms

6f91m2mwb68fqmje.htm

6f91m2mwb68fqmje.htm

676 ms

insight_tag_errors.gif

insight_tag_errors.gif

132 ms

narrow-right.png

narrow-right.png

814 ms

galeria_01.jpg

galeria_01.jpg

835 ms

galeria_02.jpg

galeria_02.jpg

906 ms

galeria_03.jpg

galeria_03.jpg

918 ms

galeria_04.jpg

galeria_04.jpg

935 ms

galeria_06.jpg

galeria_06.jpg

943 ms

galeria_07.jpg

galeria_07.jpg

1086 ms

galeria_08.jpg

galeria_08.jpg

962 ms

galeria_09.jpg

galeria_09.jpg

1038 ms

footer-bg.png

footer-bg.png

1049 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1006 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1028 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1062 ms

sm.js

sm.js

834 ms

form-valid.js

form-valid.js

240 ms

bhr_contact_form_basic.css

bhr_contact_form_basic.css

419 ms

custom.png

custom.png

156 ms

Accessibility Review

4developers.org.pl accessibility score

85

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.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

4developers.org.pl best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

4developers.org.pl SEO score

79

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

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 4developers.org.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 4developers.org.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

4developers.org.pl

Open Graph data is detected on the main page of 4Developers. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: