9.2 sec in total
868 ms
6.2 sec
2.1 sec
Welcome to biology-online.ru homepage info - get ready to check Biology Online best content for Russia right away, or after learning these important things about biology-online.ru
Современные уроки биологии. Сайт - сообщество учителей биологии, которые делятся своими разработками к урокам биологии
Visit biology-online.ruWe analyzed Biology-online.ru page load time and found that the first response time was 868 ms and then it took 8.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
biology-online.ru performance score
name
value
score
weighting
Value2.8 s
55/100
10%
Value2.8 s
82/100
25%
Value8.7 s
16/100
10%
Value520 ms
56/100
30%
Value0.747
6/100
15%
Value14.1 s
10/100
10%
868 ms
479 ms
327 ms
330 ms
324 ms
Our browser made a total of 151 requests to load all elements on the main page. We found that 74% of them (111 requests) were addressed to the original Biology-online.ru, 11% (16 requests) were made to Vk.com and 3% (4 requests) were made to Acint.net. The less responsive or slowest element that took the longest time to load (2.6 sec) relates to the external source Cs629110.vk.me.
Page size can be reduced by 770.1 kB (36%)
2.1 MB
1.4 MB
In fact, the total size of Biology-online.ru main page is 2.1 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. 60% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.
Potential reduce by 97.8 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. This page needs HTML code to be minified as it can gain 19.2 kB, which is 16% 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 97.8 kB or 83% of the original size.
Potential reduce by 24.3 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. Biology Online images are well optimized though.
Potential reduce by 496.7 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 496.7 kB or 76% of the original size.
Potential reduce by 151.3 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. Biology-online.ru needs all CSS files to be minified and compressed as it can save up to 151.3 kB or 83% of the original size.
Number of requests can be reduced by 64 (44%)
146
82
The browser has sent 146 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Biology Online. 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 14 to 1 for CSS and as a result speed up the page load time.
biology-online.ru
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biology-online.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.
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
ARIA IDs are not unique
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Form elements do not have associated labels
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
biology-online.ru 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
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
biology-online.ru 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
RU
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Biology-online.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 Biology-online.ru 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.
biology-online.ru
Open Graph description is not detected on the main page of Biology Online. 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: