Access 12lo.warszawa.pl. XII Liceum Ogólnokształcące im. Henryka Sienkiewicza w Warszawie

name

value

score

weighting

FCP (First Contentful Paint)

Value0.6 s

100/100

10%

LCP (Largest Contentful Paint)

Value0.6 s

100/100

25%

SI (Speed Index)

Value0.6 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.6 s

100/100

10%

12lo.warszawa.pl

569 ms

style.css

237 ms

naglowek_pasek.gif

120 ms

naglowek.jpg

356 ms

menu2_tlo.gif

251 ms

Our browser made a total of 93 requests to load all elements on the main page. We found that all of those requests were addressed to 12lo.warszawa.pl and no external sources were called. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain 12lo.warszawa.pl.

Content Size

2.6 MB

After Optimization

2.5 MB

In fact, the total size of 12lo.warszawa.pl main page is 2.6 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. 40% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 48.9 kB

Original 70.1 kB
After minification 69.8 kB
After compression 21.2 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 48.9 kB or 70% of the original size.

Image Optimization

-2%

Potential reduce by 40.1 kB

Original 2.5 MB
After minification 2.5 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. 12 Lo images are well optimized though.

CSS Optimization

-85%

Potential reduce by 5.8 kB

Original 6.8 kB
After minification 5.6 kB
After compression 1.0 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. 12lo.warszawa.pl needs all CSS files to be minified and compressed as it can save up to 5.8 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 12 Lo. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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.

High

Image elements do not have [alt] attributes

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Language and Encoding

Language Detected

PL
Language Claimed

N/A
Encoding

ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 12lo.warszawa.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 12lo.warszawa.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

12lo.warszawa.pl

Open Graph description is not detected on the main page of 12 Lo. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

XII Liceum Ogólnokształcące im. Henryka Sienkiewicza w Warszawie

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

12lo.warszawa.pl

style.css

naglowek_pasek.gif

naglowek.jpg

menu2_tlo.gif

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

12lo.warszawa.pl

style.css

naglowek_pasek.gif

naglowek.jpg

menu2_tlo.gif

naglowek_b.jpg

menu_pasek.gif

menu_element_zwykly.gif

menu_bottom.jpg

naglowek_strona.jpg

tlo_srodek.gif

bip.jpg

en.jpg

de.jpg

godlo.png

men.jpg

mko.jpg

znak1.png

itszkola.png

umw.jpg

udw.jpg

wogole.jpg

cke.jpg

oke.jpg

kf8.jpg

kf9.jpg

kf10.jpg

helios1.jpg

helios2.jpg

helios3.jpg

helios4.jpg

wplata.jpg

futsal2.jpg

kf4.jpg

kf5.jpg

kf6.jpg

kf7.jpg

rik4.jpg

rik5.jpg

futsal1.jpg

mojawola1.png

mojawola2.jpg

mojawola3.png

rik1.jpg