Report Summary

  • 26

    Performance

    Renders faster than
    47% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

edukacja.helion.pl

Podręczniki szkolne do informatyki, Informatyka Europejczyka - Helion Edukacja

Page Load Speed

4.6 sec in total

First Response

940 ms

Resources Loaded

3.4 sec

Page Rendered

282 ms

edukacja.helion.pl screenshot

About Website

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

Podręczniki szkolne to niezwykłe pomoce naukowe zarówno dla nauczycieli jak i ich podopiecznych. Wszystkie publikacje zgodne są z podstawą programową MEN, gruntownie przygotowują młodzież na każdym et...

Visit edukacja.helion.pl

Key Findings

We analyzed Edukacja.helion.pl page load time and found that the first response time was 940 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

edukacja.helion.pl performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value16.9 s

0/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value1,550 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.042

99/100

15%

TTI (Time to Interactive)

Value13.5 s

11/100

10%

Network Requests Diagram

edukacja.helion.pl

940 ms

styles.css

563 ms

scripts.js

1066 ms

jquery-migrate-1.1.1.js

353 ms

css

26 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 85% of them (51 requests) were addressed to the original Edukacja.helion.pl, 3% (2 requests) were made to Google-analytics.com and 3% (2 requests) were made to S.ytimg.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Edukacja.helion.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 527.4 kB (40%)

Content Size

1.3 MB

After Optimization

790.9 kB

In fact, the total size of Edukacja.helion.pl main page is 1.3 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. 50% of websites need less resources to load. Images take 681.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 27.5 kB

  • Original 33.9 kB
  • After minification 25.7 kB
  • After compression 6.4 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 8.2 kB, which is 24% 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 27.5 kB or 81% of the original size.

Image Optimization

-9%

Potential reduce by 60.2 kB

  • Original 681.5 kB
  • After minification 621.3 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. Edukacja Helion images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 150.6 kB

  • Original 247.3 kB
  • After minification 241.3 kB
  • After compression 96.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 150.6 kB or 61% of the original size.

CSS Optimization

-81%

Potential reduce by 289.1 kB

  • Original 355.6 kB
  • After minification 355.3 kB
  • After compression 66.5 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. Edukacja.helion.pl needs all CSS files to be minified and compressed as it can save up to 289.1 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (32%)

Requests Now

59

After Optimization

40

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Edukacja 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 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

edukacja.helion.pl accessibility score

63

Accessibility Issues

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

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

edukacja.helion.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

High

Page has valid source maps

SEO Factors

edukacja.helion.pl SEO score

69

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

Language and Encoding

  • Language Detected

    PL

  • Language Claimed

    PL

  • Encoding

    ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Edukacja.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 Edukacja.helion.pl main page’s claimed encoding is iso-8859-2. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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