Report Summary

  • 57

    Performance

    Renders faster than
    74% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

hexlet.io

Programming education: online courses for beginners and advanced students

Page Load Speed

2.4 sec in total

First Response

193 ms

Resources Loaded

1.7 sec

Page Rendered

453 ms

hexlet.io screenshot

About Website

Visit hexlet.io now to see the best up-to-date Hexlet content for Russia and also check out these interesting facts you probably never knew about hexlet.io

Live online community of programmers and developers. Author training programs with practice and finished projects in resumes. Hiring assistance after successful graduation

Visit hexlet.io

Key Findings

We analyzed Hexlet.io page load time and found that the first response time was 193 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

hexlet.io performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

69/100

10%

LCP (Largest Contentful Paint)

Value3.0 s

78/100

25%

SI (Speed Index)

Value5.7 s

50/100

10%

TBT (Total Blocking Time)

Value870 ms

33/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value14.5 s

8/100

10%

Network Requests Diagram

hexlet.io

193 ms

hexlet.io

370 ms

en.hexlet.io

489 ms

rollbar.min.js

96 ms

analytics.js

152 ms

Our browser made a total of 25 requests to load all elements on the main page. We found that 8% of them (2 requests) were addressed to the original Hexlet.io, 72% (18 requests) were made to D2vgcf2rm1on1i.cloudfront.net and 8% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (670 ms) relates to the external source D2vgcf2rm1on1i.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 344.3 kB (51%)

Content Size

680.2 kB

After Optimization

335.9 kB

In fact, the total size of Hexlet.io main page is 680.2 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. 35% of websites need less resources to load. Images take 432.2 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 14.4 kB

  • Original 21.3 kB
  • After minification 21.3 kB
  • After compression 6.9 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 14.4 kB or 68% of the original size.

Image Optimization

-35%

Potential reduce by 149.4 kB

  • Original 432.2 kB
  • After minification 282.8 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 149.4 kB or 35% 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 180.5 kB

  • Original 205.7 kB
  • After minification 125.5 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.io needs all CSS files to be minified and compressed as it can save up to 180.5 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (29%)

Requests Now

21

After Optimization

15

The browser has sent 21 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.io accessibility score

95

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.

Best Practices

hexlet.io 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.io SEO score

99

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • 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.io can be misinterpreted by Google and other search engines. Our service has detected that English 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.io 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: