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Report Summary

  • 10

    Performance

    Renders faster than
    23% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 60% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

4developers.org.pl

4Developers – Interdyscyplinarny festiwal technologiczny dla programistów w Polsce!

Page Load Speed

6.6 sec in total

First Response

328 ms

Resources Loaded

4.6 sec

Page Rendered

1.6 sec

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

Conference for all IT developers and their managers.

Visit 4developers.org.pl

Key Findings

We analyzed 4developers.org.pl page load time and found that the first response time was 328 ms and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

4developers.org.pl performance score

10

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.4 s

0/100

25%

SI (Speed Index)

Value19.2 s

0/100

10%

TBT (Total Blocking Time)

Value25,300 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.184

66/100

15%

TTI (Time to Interactive)

Value40.4 s

0/100

10%

Network Requests Diagram

4developers.org.pl

328 ms

627 ms

css

24 ms

css

39 ms

css

45 ms

Our browser made a total of 136 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original 4developers.org.pl, 53% (72 requests) were made to 2016.4developers.org.pl and 22% (30 requests) were made to Maps.google.com. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source 2016.4developers.org.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.4 MB (21%)

Content Size

6.6 MB

After Optimization

5.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 4developers.org.pl main page is 6.6 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 5.1 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 110.4 kB

  • Original 126.5 kB
  • After minification 110.1 kB
  • After compression 16.1 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 16.3 kB, which is 13% 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 110.4 kB or 87% of the original size.

Image Optimization

-6%

Potential reduce by 293.9 kB

  • Original 5.1 MB
  • After minification 4.8 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. 4Developers images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 614.3 kB

  • Original 900.4 kB
  • After minification 837.3 kB
  • After compression 286.1 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 614.3 kB or 68% of the original size.

CSS Optimization

-88%

Potential reduce by 354.3 kB

  • Original 404.3 kB
  • After minification 313.1 kB
  • After compression 50.0 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. 4developers.org.pl needs all CSS files to be minified and compressed as it can save up to 354.3 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 37 (31%)

Requests Now

121

After Optimization

84

  • Images
  • JavaScript
  • CSS

The browser has sent 121 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 24 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

328 ms

627 ms

css

css

24 ms

css

css

39 ms

css

css

45 ms

theme-2.css

theme-2.css

563 ms

theme-animate.css

theme-animate.css

469 ms

theme-elements-2.css

theme-elements-2.css

417 ms

plugins.css

plugins.css

194 ms

4devgreen.css

4devgreen.css

196 ms

font-awesome.min.css

font-awesome.min.css

385 ms

skeleton.css

skeleton.css

388 ms

flexslider.css

flexslider.css

316 ms

prettyPhoto.css

prettyPhoto.css

412 ms

theme-responsive.css

theme-responsive.css

674 ms

modernizr.js

modernizr.js

482 ms

jquery.js

jquery.js

709 ms

js

js

22 ms

plugins.js

plugins.js

715 ms

respond.js

respond.js

381 ms

jquery.appear.js

jquery.appear.js

397 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

471 ms

jquery.flexslider.js

jquery.flexslider.js

709 ms

jquery.form-validator.min.js

jquery.form-validator.min.js

712 ms

theme.js

theme.js

710 ms

cookieconsent.min.js

cookieconsent.min.js

6 ms

analytics.js

analytics.js

150 ms

top-black.png

top-black.png

117 ms

logo.png

logo.png

115 ms

slide-1.jpg

slide-1.jpg

563 ms

slide-2.jpg

slide-2.jpg

581 ms

slide-3.jpg

slide-3.jpg

619 ms

dominik_przybysz_6vndd1c.png

dominik_przybysz_6vndd1c.png

482 ms

aga-zdj.png

aga-zdj.png

753 ms

piotr_misiurek.png

piotr_misiurek.png

578 ms

pusty_prelegent-01_MmYEWNO.png

pusty_prelegent-01_MmYEWNO.png

576 ms

speaker-robert-pankowecki_6mtuctA.jpg

speaker-robert-pankowecki_6mtuctA.jpg

656 ms

pusty_prelegent-01_3HGukUs.png

pusty_prelegent-01_3HGukUs.png

671 ms

pusty_prelegent-01_2Z7CBJN.png

pusty_prelegent-01_2Z7CBJN.png

673 ms

4developers.jpg

4developers.jpg

868 ms

newszag.png

newszag.png

807 ms

kokosa.jpg

kokosa.jpg

747 ms

Zrzut_ekranu_2016-02-26_o_15.34.06.png

Zrzut_ekranu_2016-02-26_o_15.34.06.png

856 ms

maciej_aniserowicz.jpg

maciej_aniserowicz.jpg

765 ms

ciemna.jpg

ciemna.jpg

933 ms

Zrzut_ekranu_2016-02-29_o_12.57.39.png

Zrzut_ekranu_2016-02-29_o_12.57.39.png

1123 ms

1900669358.jpg

1900669358.jpg

861 ms

Wojciech.Dworakowski_2.jpg

Wojciech.Dworakowski_2.jpg

999 ms

mgil_4.png

mgil_4.png

1044 ms

profile_picture_square_small.jpg

profile_picture_square_small.jpg

956 ms

LH_1.JPG

LH_1.JPG

961 ms

Zrzut_ekranu_2016-02-29_o_12.58.17.png

Zrzut_ekranu_2016-02-29_o_12.58.17.png

1308 ms

jaroslaw-palka_1_1.png

jaroslaw-palka_1_1.png

1147 ms

Screen_Shot_2015-01-14_at_18.23.49.png

Screen_Shot_2015-01-14_at_18.23.49.png

1059 ms

binarappsduze222_a16Y5hO.jpg

binarappsduze222_a16Y5hO.jpg

1093 ms

blabla.png

blabla.png

1135 ms

mobida.png

mobida.png

1154 ms

parcujpl.png

parcujpl.png

1189 ms

sii.png

sii.png

1210 ms

coders_R3YDzTW.png

coders_R3YDzTW.png

1132 ms

kontrajktit.png

kontrajktit.png

1144 ms

dotnetpw.png

dotnetpw.png

1150 ms

krugcommunity.png

krugcommunity.png

1184 ms

wroc.png

wroc.png

1222 ms

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

134 ms

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

136 ms

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

136 ms

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

136 ms

linecons.woff

linecons.woff

1232 ms

collect

collect

121 ms

sm.js

sm.js

348 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

904 ms

Logo_Praca_pl.jpg

Logo_Praca_pl.jpg

852 ms

spotkaniait_s1KVdTt.png

spotkaniait_s1KVdTt.png

837 ms

kdk.png

kdk.png

835 ms

kokosa_geKcf89.png

kokosa_geKcf89.png

850 ms

crossweb.png

crossweb.png

828 ms

r.gif

r.gif

237 ms

dotnetodobre_EVyTDe7.png

dotnetodobre_EVyTDe7.png

824 ms

logo_interia.png

logo_interia.png

819 ms

nokillswitch_wn1RidY.png

nokillswitch_wn1RidY.png

830 ms

stapprsetyourcode_baZtdqR.png

stapprsetyourcode_baZtdqR.png

754 ms

zwinnalodz.png

zwinnalodz.png

771 ms

uxblog_QMENgNd.png

uxblog_QMENgNd.png

771 ms

dark-bottom.css

dark-bottom.css

64 ms

date.js

date.js

196 ms

security.js

security.js

195 ms

common.js

common.js

21 ms

map.js

map.js

42 ms

util.js

util.js

42 ms

marker.js

marker.js

41 ms

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44 ms

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42 ms

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bH7276GfdCjMjApa_dkG6T8E0i7KZn-EPnyo3HZu7kw.woff

43 ms

logo.png

logo.png

105 ms

onion.js

onion.js

48 ms

openhand_8_8.cur

openhand_8_8.cur

90 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

102 ms

stats.js

stats.js

26 ms

controls.js

controls.js

20 ms

transparent.png

transparent.png

27 ms

css

css

72 ms

spotlight-poi.png

spotlight-poi.png

85 ms

google4.png

google4.png

50 ms

mapcnt6.png

mapcnt6.png

50 ms

sv5.png

sv5.png

51 ms

tmapctrl.png

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65 ms

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76 ms

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imgs8.png

73 ms

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52 ms

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51 ms

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50 ms

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52 ms

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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

83

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

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

    EN

  • 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 does not match the claimed English 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 description is not detected on the main page of 4Developers. 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: