3.9 sec in total
1 sec
2.2 sec
639 ms
Click here to check amazing Zsi content for Poland. Otherwise, check out these important facts you probably never knew about zsi.slupsk.pl
Strona Zespołu Szkół Informatycznych w Słupsku
Visit zsi.slupsk.plWe analyzed Zsi.slupsk.pl page load time and found that the first response time was 1 sec and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
zsi.slupsk.pl performance score
name
value
score
weighting
Value4.1 s
21/100
10%
Value8.7 s
1/100
25%
Value4.9 s
65/100
10%
Value130 ms
96/100
30%
Value0.235
53/100
15%
Value5.3 s
73/100
10%
1005 ms
235 ms
237 ms
353 ms
237 ms
Our browser made a total of 48 requests to load all elements on the main page. We found that 65% of them (31 requests) were addressed to the original Zsi.slupsk.pl, 21% (10 requests) were made to Static.xx.fbcdn.net and 13% (6 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Zsi.slupsk.pl.
Page size can be reduced by 119.3 kB (13%)
926.8 kB
807.6 kB
In fact, the total size of Zsi.slupsk.pl main page is 926.8 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. 30% of websites need less resources to load. Images take 836.0 kB which makes up the majority of the site volume.
Potential reduce by 24.3 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 8.1 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 24.3 kB or 82% of the original size.
Potential reduce by 44.5 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. Zsi images are well optimized though.
Potential reduce by 41.1 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 41.1 kB or 84% of the original size.
Potential reduce by 9.4 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. Zsi.slupsk.pl needs all CSS files to be minified and compressed as it can save up to 9.4 kB or 79% of the original size.
Number of requests can be reduced by 16 (34%)
47
31
The browser has sent 47 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zsi. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
zsi.slupsk.pl
1005 ms
style.css
235 ms
menu.js
237 ms
lytebox.js
353 ms
lytebox.css
237 ms
marquee.js
238 ms
img01.jpg
122 ms
img02.jpg
121 ms
img10.jpg
119 ms
img03.jpg
239 ms
img04.jpg
122 ms
lp.jpg
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warsztaty_matematyczne.jpg
725 ms
glowna.jpg
371 ms
busy.jpg
834 ms
brazowe_technikum_2015.png
476 ms
agrafka.JPG
373 ms
szkola_promujaca_zdrowie.png
482 ms
szkola_bez_przemocy.gif
485 ms
mlodzi_kreatywni.png
583 ms
szkolawspolpracy.jpeg
599 ms
aktywny_uczen.jpg
604 ms
rozwoj_przez_kompetencje.png
701 ms
akademia_czerniaka.png
718 ms
zachowaj_rownowage.png
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logika.jpg
818 ms
satori.jpg
832 ms
img07.jpg
814 ms
img18.gif
779 ms
img11.gif
796 ms
img05.jpg
878 ms
likebox.php
238 ms
hDvwL1_H7g-.css
49 ms
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55 ms
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8 ms
VXcANLwwL5J.js
3 ms
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6 ms
zsi.slupsk.pl accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Links do not have a discernible name
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
zsi.slupsk.pl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
zsi.slupsk.pl SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Image elements do not have [alt] attributes
PL
PL
ISO-8859-2
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zsi.slupsk.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 Zsi.slupsk.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.
zsi.slupsk.pl
Open Graph description is not detected on the main page of Zsi. 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: