Tools & Wizards About Us
helion.pl screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

helion.pl

Księgarnia internetowa i wydawnictwo Helion - książki informatyczne, ebooki, audiobooki.

Page Load Speed

12.1 sec in total

First Response

344 ms

Resources Loaded

8.1 sec

Page Rendered

3.6 sec

helion.pl screenshot

About Website

Welcome to helion.pl homepage info - get ready to check Helion best content for Poland right away, or after learning these important things about helion.pl

W księgarni internetowej wydawnictwa Helion znajdziesz książki, e-booki i audiobooki wydawnictwa Helion. Opinie, recenzje, promocje i zestawy promocyjne.

Visit helion.pl

Key Findings

We analyzed Helion.pl page load time and found that the first response time was 344 ms and then it took 11.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

helion.pl performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value15.0 s

0/100

25%

SI (Speed Index)

Value10.5 s

7/100

10%

TBT (Total Blocking Time)

Value3,230 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value19.9 s

2/100

10%

Network Requests Diagram

helion.pl

344 ms

helion.pl

1044 ms

uc.js

36 ms

runtime.f520af94.js

380 ms

0.a169edb6.js

511 ms

Our browser made a total of 299 requests to load all elements on the main page. We found that 5% of them (15 requests) were addressed to the original Helion.pl, 91% (271 requests) were made to Static01.helion.com.pl and 1% (2 requests) were made to Googleadservices.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Static01.helion.com.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (19%)

Content Size

6.5 MB

After Optimization

5.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Helion.pl main page is 6.5 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. 80% 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 4.8 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 1.2 MB

  • Original 1.3 MB
  • After minification 975.7 kB
  • After compression 159.8 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. This page needs HTML code to be minified as it can gain 352.5 kB, which is 27% 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 1.2 MB or 88% of the original size.

Image Optimization

-0%

Potential reduce by 3.2 kB

  • Original 4.8 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. Helion images are well optimized though.

JavaScript Optimization

-27%

Potential reduce by 96.5 kB

  • Original 356.3 kB
  • After minification 353.9 kB
  • After compression 259.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 96.5 kB or 27% of the original size.

CSS Optimization

-1%

Potential reduce by 367 B

  • Original 26.6 kB
  • After minification 26.6 kB
  • After compression 26.3 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. Helion.pl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 25 (9%)

Requests Now

293

After Optimization

268

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 293 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Helion. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

helion.pl

helion.pl

344 ms

helion.pl

helion.pl

1044 ms

uc.js

uc.js

36 ms

runtime.f520af94.js

runtime.f520af94.js

380 ms

0.a169edb6.js

0.a169edb6.js

511 ms

1.f86efd7a.js

1.f86efd7a.js

381 ms

app_main_page_js.023bb40f.js

app_main_page_js.023bb40f.js

517 ms

app_jquery.c05c868b.js

app_jquery.c05c868b.js

380 ms

app_global.25b51370.css

app_global.25b51370.css

504 ms

app_main_page_css.a1ccc128.css

app_main_page_css.a1ccc128.css

506 ms

time.js

time.js

505 ms

swiper-bundle.min.css

swiper-bundle.min.css

633 ms

js

js

74 ms

jquery.jplayer.min.js

jquery.jplayer.min.js

765 ms

player.js

player.js

621 ms

axios.min.js

axios.min.js

26 ms

swiper-bundle.min.js

swiper-bundle.min.js

567 ms

jquery-ui.min.js

jquery-ui.min.js

687 ms

jquery-ui.min.css

jquery-ui.min.css

482 ms

conversion.js

conversion.js

127 ms

suggester.js

suggester.js

133 ms

change_format.js

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134 ms

user_info.js

user_info.js

133 ms

bb-shop.min.js

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706 ms

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339 ms

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341 ms

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423 ms

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651 ms

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702 ms

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860 ms

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779 ms

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700 ms

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1027 ms

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1161 ms

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1040 ms

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1039 ms

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1157 ms

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1159 ms

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1170 ms

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1248 ms

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1287 ms

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1288 ms

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1289 ms

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1378 ms

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1133 ms

PAJJhLM6sSoWKfWCAAwDAjgbRAAB42mNgYGBkAIIbCZo5IPrmUn0hGA0AO8EFTQAA

PAJJhLM6sSoWKfWCAAwDAjgbRAAB42mNgYGBkAIIbCZo5IPrmUn0hGA0AO8EFTQAA

2 ms

apiiop.jpg

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1133 ms

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all.js

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977 ms

all.js

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15 ms

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bb4shop.js

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823 ms

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793 ms

angdz3.jpg

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787 ms

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861 ms

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898 ms

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783 ms

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781 ms

analytics.js

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82 ms

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780 ms

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779 ms

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780 ms

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778 ms

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779 ms

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779 ms

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780 ms

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779 ms

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780 ms

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779 ms

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779 ms

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779 ms

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780 ms

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778 ms

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779 ms

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778 ms

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728 ms

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736 ms

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773 ms

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774 ms

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725 ms

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733 ms

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667 ms

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747 ms

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777 ms

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777 ms

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775 ms

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779 ms

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776 ms

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780 ms

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780 ms

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779 ms

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779 ms

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779 ms

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780 ms

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780 ms

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779 ms

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778 ms

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780 ms

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781 ms

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779 ms

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782 ms

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780 ms

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780 ms

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780 ms

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780 ms

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777 ms

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778 ms

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780 ms

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780 ms

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780 ms

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778 ms

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778 ms

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780 ms

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780 ms

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780 ms

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780 ms

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778 ms

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779 ms

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780 ms

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780 ms

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779 ms

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780 ms

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778 ms

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778 ms

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780 ms

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780 ms

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779 ms

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780 ms

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779 ms

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778 ms

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780 ms

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778 ms

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778 ms

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778 ms

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778 ms

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778 ms

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780 ms

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780 ms

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780 ms

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780 ms

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778 ms

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779 ms

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780 ms

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780 ms

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781 ms

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779 ms

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779 ms

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781 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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780 ms

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783 ms

mini-chatgpt1200.png

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782 ms

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779 ms

mini-1helwielkanocblog1200.png

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782 ms

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780 ms

wydawnictwo_ksiazki.png

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783 ms

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782 ms

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780 ms

grupa_helion_white.svg

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781 ms

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781 ms

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780 ms

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pasek_pobierania_aplikacji.png

781 ms

social.png

social.png

780 ms

helion.svg

helion.svg

782 ms

helion-brak.png

helion-brak.png

780 ms

arrow-slider.svg

arrow-slider.svg

779 ms

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779 ms

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777 ms

Accessibility Review

helion.pl accessibility score

83

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-hidden="true"] elements contain focusable descendents

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

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

helion.pl best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

helion.pl SEO score

91

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

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 Helion.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 Helion.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

helion.pl

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