8.8 sec in total
376 ms
8 sec
420 ms
Click here to check amazing Compsci Center content for Russia. Otherwise, check out these important facts you probably never knew about compscicenter.ru
Computer Science Center — объединённая инициатива Школы анализа данных, Computer Science клуба и JetBrains.
Visit compscicenter.ruWe analyzed Compscicenter.ru page load time and found that the first response time was 376 ms and then it took 8.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
compscicenter.ru performance score
name
value
score
weighting
Value4.8 s
12/100
10%
Value5.4 s
20/100
25%
Value6.0 s
47/100
10%
Value620 ms
48/100
30%
Value0.191
64/100
15%
Value10.5 s
24/100
10%
376 ms
568 ms
2411 ms
91 ms
1273 ms
Our browser made a total of 33 requests to load all elements on the main page. We found that 70% of them (23 requests) were addressed to the original Compscicenter.ru, 6% (2 requests) were made to Maxcdn.bootstrapcdn.com and 6% (2 requests) were made to Cdn.mathjax.org. The less responsive or slowest element that took the longest time to load (3.9 sec) belongs to the original domain Compscicenter.ru.
Page size can be reduced by 405.2 kB (43%)
934.5 kB
529.3 kB
In fact, the total size of Compscicenter.ru main page is 934.5 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. 40% of websites need less resources to load. Images take 419.1 kB which makes up the majority of the site volume.
Potential reduce by 31.0 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 5.1 kB, which is 12% 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 31.0 kB or 73% of the original size.
Potential reduce by 14.9 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. Compsci Center images are well optimized though.
Potential reduce by 180.9 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 180.9 kB or 71% of the original size.
Potential reduce by 178.3 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. Compscicenter.ru needs all CSS files to be minified and compressed as it can save up to 178.3 kB or 82% of the original size.
Number of requests can be reduced by 19 (66%)
29
10
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Compsci Center. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
compscicenter.ru
376 ms
compscicenter.ru
568 ms
style.bc8366f5a25d.css
2411 ms
font-awesome.min.css
91 ms
tomorrow.96074df3d5e3.css
1273 ms
modernizr.custom.e4119514409e.js
1383 ms
polyfiller.f2f724b65c47.js
866 ms
MathJax.js
86 ms
jquery-1.11.3.min.js
149 ms
raven.min.js
139 ms
raven_conf.826302ffa21b.js
1279 ms
underscore-min.js
79 ms
highlight.pack.71e59453dcf0.js
2076 ms
base.d503494235c0.js
2546 ms
TeX-AMS-MML_HTMLorMML.js
131 ms
logo.589c97fafd7f.png
192 ms
cscenter.ced41806b359.jpg
3877 ms
theoretical_informatics-4.png
185 ms
e6fb08cd178b0e290f14369817c1fdb5.jpg
261 ms
yandexdataschool.e39870225d8b.svg
258 ms
jetbrains.e0285ef3ec7e.svg
185 ms
239.1b015059ebaf.svg
252 ms
csclub.97cd30498e7a.png
256 ms
watch.js
71 ms
shim-ext.css
237 ms
3.js
207 ms
form-shim-extend.js
231 ms
17.js
580 ms
fontawesome-webfont.woff
100 ms
nr-918.min.js
342 ms
form-validation.js
345 ms
920cccd231
388 ms
jquery.ui.position.js
135 ms
compscicenter.ru accessibility score
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
Heading elements are not in a sequentially-descending order
compscicenter.ru best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
compscicenter.ru SEO score
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
Tap targets are not sized appropriately
RU
N/A
N/A
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Compscicenter.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian 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 Compscicenter.ru main page’s claimed encoding is . 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.
compscicenter.ru
Open Graph description is not detected on the main page of Compsci Center. 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: