3.4 sec in total
496 ms
2.8 sec
167 ms
Welcome to astrouw.edu.pl homepage info - get ready to check Astrouw best content for Poland right away, or after learning these important things about astrouw.edu.pl
Obserwatorium Astronomiczne Uniwersytetu Warszawskiego działa nieprzerwanie od 1825 roku. Prowadzi badania i studia w zakresie astronomii i astrofizyki.
Visit astrouw.edu.plWe analyzed Astrouw.edu.pl page load time and found that the first response time was 496 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
astrouw.edu.pl performance score
name
value
score
weighting
Value6.4 s
2/100
10%
Value7.6 s
4/100
25%
Value11.6 s
5/100
10%
Value1,640 ms
12/100
30%
Value0.266
46/100
15%
Value16.6 s
5/100
10%
496 ms
1306 ms
492 ms
215 ms
224 ms
Our browser made a total of 20 requests to load all elements on the main page. We found that all of those requests were addressed to Astrouw.edu.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 Astrouw.edu.pl.
Page size can be reduced by 117.9 kB (44%)
270.6 kB
152.7 kB
In fact, the total size of Astrouw.edu.pl main page is 270.6 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. 15% of websites need less resources to load. Images take 121.3 kB which makes up the majority of the site volume.
Potential reduce by 17.6 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. 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 17.6 kB or 80% of the original size.
Potential reduce by 396 B
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. Astrouw images are well optimized though.
Potential reduce by 58.4 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 58.4 kB or 73% of the original size.
Potential reduce by 41.4 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. Astrouw.edu.pl needs all CSS files to be minified and compressed as it can save up to 41.4 kB or 88% of the original size.
Number of requests can be reduced by 3 (17%)
18
15
The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Astrouw. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.
astrouw.edu.pl
496 ms
www.astrouw.edu.pl
1306 ms
mootools.js
492 ms
caption.js
215 ms
system.css
224 ms
general.css
226 ms
template.css
357 ms
color_bg.css
319 ms
menu.js
425 ms
tlo.gif
108 ms
logoa.png
483 ms
eng.gif
214 ms
home.png
213 ms
logob-new.png
337 ms
butt_l.png
235 ms
but_m.png
329 ms
butt_r.png
435 ms
printButton.png
441 ms
s01.jpg
455 ms
arrow_right.gif
534 ms
astrouw.edu.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
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
astrouw.edu.pl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
astrouw.edu.pl SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Document uses legible font sizes
PL
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Astrouw.edu.pl can be misinterpreted by Google and other search engines. Our service has detected that Polish is used on the page, and it does not match the claimed English language. Our system also found out that Astrouw.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.
astrouw.edu.pl
Open Graph description is not detected on the main page of Astrouw. 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: