2.3 sec in total
573 ms
1.5 sec
253 ms
Welcome to cleverstudents.ru homepage info - get ready to check Cleverstudents best content for Russia right away, or after learning these important things about cleverstudents.ru
cleverstudents (ru) - теория и практика по математике. Доступно изложенная теория по различным математическим дисциплинам, разобранные решения характерных примеров и типовых задач.
Visit cleverstudents.ruWe analyzed Cleverstudents.ru page load time and found that the first response time was 573 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.
cleverstudents.ru performance score
name
value
score
weighting
Value3.8 s
28/100
10%
Value3.8 s
56/100
25%
Value3.8 s
85/100
10%
Value70 ms
99/100
30%
Value0
100/100
15%
Value4.9 s
77/100
10%
573 ms
521 ms
135 ms
26 ms
264 ms
Our browser made a total of 12 requests to load all elements on the main page. We found that 42% of them (5 requests) were addressed to the original Cleverstudents.ru, 33% (4 requests) were made to Yastatic.net and 8% (1 request) were made to Yandex.st. The less responsive or slowest element that took the longest time to load (573 ms) belongs to the original domain Cleverstudents.ru.
Page size can be reduced by 41.5 kB (54%)
77.3 kB
35.7 kB
In fact, the total size of Cleverstudents.ru main page is 77.3 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. Only 10% of websites need less resources to load. HTML takes 44.6 kB which makes up the majority of the site volume.
Potential reduce by 35.8 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 35.8 kB or 80% of the original size.
Potential reduce by 52 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. Cleverstudents images are well optimized though.
Potential reduce by 1.6 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 1.6 kB or 11% of the original size.
Potential reduce by 4.1 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. Cleverstudents.ru needs all CSS files to be minified and compressed as it can save up to 4.1 kB or 78% of the original size.
We found no issues to fix!
8
8
The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cleverstudents. According to our analytics all requests are already optimized.
cleverstudents.ru
573 ms
www.cleverstudents.ru
521 ms
style_mainpage.css
135 ms
share.js
26 ms
hit
264 ms
b-share-form-button.png
13 ms
watch.js
5 ms
logo_normal_mainpage.png
134 ms
arrow.png
267 ms
b-share-form-button_share__icon.png
10 ms
b-share-icon.png
13 ms
b-share-popup_down__tail.png
15 ms
cleverstudents.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.
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
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
Links do not have a discernible name
cleverstudents.ru best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Browser errors were logged to the console
Page has valid source maps
cleverstudents.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
WINDOWS-1251
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cleverstudents.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 Cleverstudents.ru main page’s claimed encoding is windows-1251. 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.
cleverstudents.ru
Open Graph description is not detected on the main page of Cleverstudents. 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: