Report Summary

  • 49

    Performance

    Renders faster than
    68% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 75% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

hexlet.ru

Хекслет — уроки по основам информационных технологий

Page Load Speed

2.3 sec in total

First Response

377 ms

Resources Loaded

1.6 sec

Page Rendered

374 ms

hexlet.ru screenshot

About Website

Click here to check amazing Hexlet content. Otherwise, check out these important facts you probably never knew about hexlet.ru

Онлайн-курсы по программированию и разработке, видео-лекции и упражнения

Visit hexlet.ru

Key Findings

We analyzed Hexlet.ru page load time and found that the first response time was 377 ms and then it took 2 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.

Performance Metrics

hexlet.ru performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

92/100

25%

SI (Speed Index)

Value7.4 s

27/100

10%

TBT (Total Blocking Time)

Value2,740 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value22.4 s

1/100

10%

Network Requests Diagram

hexlet.ru

377 ms

ru.hexlet.io

472 ms

rollbar.min.js

99 ms

analytics.js

67 ms

welcome-1e0778f4b32b4fc16946918bd2136c448ed916f77301c12cab615ee749fce25d.css

137 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Hexlet.ru, 79% (22 requests) were made to D2vgcf2rm1on1i.cloudfront.net and 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (578 ms) relates to the external source D2vgcf2rm1on1i.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 476.8 kB (45%)

Content Size

1.1 MB

After Optimization

594.4 kB

In fact, the total size of Hexlet.ru main page is 1.1 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. 45% of websites need less resources to load. Images take 818.0 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 18.3 kB

  • Original 26.6 kB
  • After minification 26.5 kB
  • After compression 8.4 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 18.3 kB or 69% of the original size.

Image Optimization

-34%

Potential reduce by 278.1 kB

  • Original 818.0 kB
  • After minification 539.9 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. Obviously, Hexlet needs image optimization as it can save up to 278.1 kB or 34% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-88%

Potential reduce by 180.4 kB

  • Original 205.6 kB
  • After minification 125.6 kB
  • After compression 25.2 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. Hexlet.ru needs all CSS files to be minified and compressed as it can save up to 180.4 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (20%)

Requests Now

25

After Optimization

20

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Hexlet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

hexlet.ru accessibility score

90

Accessibility Issues

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

High

[aria-hidden="true"] elements contain focusable descendents

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

<frame> or <iframe> elements do not have a title

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

hexlet.ru best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

hexlet.ru SEO score

100

Search Engine Optimization Advices

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    RU

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Hexlet.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 Hexlet.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.

Social Sharing Optimization

Open Graph data is detected on the main page of Hexlet. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: