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deltami.edu.pl screenshot

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

deltami.edu.pl

Delta - Strona główna

Page Load Speed

6.8 sec in total

First Response

403 ms

Resources Loaded

5.3 sec

Page Rendered

1.1 sec

deltami.edu.pl screenshot

About Website

Click here to check amazing Delta Mi content for Poland. Otherwise, check out these important facts you probably never knew about deltami.edu.pl

DeltaMi - portal popularnonaukowy miesięcznika Delta - matematyka, fizyka, informatyka, astronomia, nauki przyrodnicze.

Visit deltami.edu.pl

Key Findings

We analyzed Deltami.edu.pl page load time and found that the first response time was 403 ms and then it took 6.4 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

deltami.edu.pl performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

27/100

25%

SI (Speed Index)

Value5.9 s

48/100

10%

TBT (Total Blocking Time)

Value1,110 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.034

100/100

15%

TTI (Time to Interactive)

Value9.6 s

29/100

10%

Network Requests Diagram

deltami.edu.pl

403 ms

www.deltami.edu.pl

721 ms

index.css

220 ms

highslide.css

320 ms

index.css

216 ms

Our browser made a total of 176 requests to load all elements on the main page. We found that 91% of them (160 requests) were addressed to the original Deltami.edu.pl, 4% (7 requests) were made to Google.com and 1% (2 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (964 ms) belongs to the original domain Deltami.edu.pl.

Page Optimization Overview & Recommendations

Page size can be reduced by 623.0 kB (27%)

Content Size

2.3 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Deltami.edu.pl main page is 2.3 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. 70% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 190.7 kB

  • Original 227.3 kB
  • After minification 201.3 kB
  • After compression 36.6 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. This page needs HTML code to be minified as it can gain 26.0 kB, which is 11% 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 190.7 kB or 84% of the original size.

Image Optimization

-14%

Potential reduce by 268.4 kB

  • Original 1.9 MB
  • After minification 1.6 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. Obviously, Delta Mi needs image optimization as it can save up to 268.4 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-68%

Potential reduce by 100.9 kB

  • Original 149.2 kB
  • After minification 123.9 kB
  • After compression 48.2 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 100.9 kB or 68% of the original size.

CSS Optimization

-84%

Potential reduce by 62.9 kB

  • Original 75.3 kB
  • After minification 57.6 kB
  • After compression 12.4 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. Deltami.edu.pl needs all CSS files to be minified and compressed as it can save up to 62.9 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (18%)

Requests Now

171

After Optimization

140

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 171 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Delta Mi. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

deltami.edu.pl

deltami.edu.pl

403 ms

www.deltami.edu.pl

www.deltami.edu.pl

721 ms

index.css

index.css

220 ms

highslide.css

highslide.css

320 ms

index.css

index.css

216 ms

index.css

index.css

223 ms

jquery.min.js

jquery.min.js

9 ms

jquery-migrate-1.2.1.js

jquery-migrate-1.2.1.js

7 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

334 ms

jquery.cycle2.autoheight.min.js

jquery.cycle2.autoheight.min.js

233 ms

main.js

main.js

319 ms

highslide-full.js

highslide-full.js

548 ms

jsapi

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27 ms

jquery.ba-resize.min.js

jquery.ba-resize.min.js

29 ms

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98 ms

index.css

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117 ms

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134 ms

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159 ms

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23 ms

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155 ms

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545 ms

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570 ms

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570 ms

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649 ms

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137 ms

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791 ms

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559 ms

Accessibility Review

deltami.edu.pl accessibility score

76

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

High

Links do not have a discernible name

Best Practices

deltami.edu.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

deltami.edu.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 Deltami.edu.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 Deltami.edu.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

deltami.edu.pl

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