Tools & Wizards About Us

Report Summary

  • 52

    Performance

    Renders faster than
    69% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

javarush.ru

Java курс от JavaRush — обучение программированию для начинающих

Page Load Speed

2.9 sec in total

First Response

314 ms

Resources Loaded

2 sec

Page Rendered

610 ms

About Website

Click here to check amazing Java Rush content for Russia. Otherwise, check out these important facts you probably never knew about javarush.ru

JavaRush — современный подход к изучению программирования и обучению в целом. Курсы Java подходят для начинающих в сфере IT и для программистов желающих расширить свои знания

Visit javarush.ru

Key Findings

We analyzed Javarush.ru page load time and found that the first response time was 314 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

javarush.ru performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

57/100

25%

SI (Speed Index)

Value3.0 s

94/100

10%

TBT (Total Blocking Time)

Value1,510 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value12.3 s

15/100

10%

Network Requests Diagram

javarush.ru

314 ms

javarush.com

529 ms

sidebar-nav.svg

103 ms

common.svg

193 ms

webide-mobile.59d677ef.png

373 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Javarush.ru, 97% (59 requests) were made to Javarush.com and 2% (1 request) were made to Adsdk.microsoft.com. The less responsive or slowest element that took the longest time to load (824 ms) relates to the external source Javarush.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 190.4 kB (34%)

Content Size

565.5 kB

After Optimization

375.0 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Javarush.ru main page is 565.5 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. 30% of websites need less resources to load. Images take 254.2 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 175.9 kB

  • Original 211.5 kB
  • After minification 207.4 kB
  • After compression 35.5 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 175.9 kB or 83% of the original size.

Image Optimization

-1%

Potential reduce by 1.3 kB

  • Original 254.2 kB
  • After minification 252.9 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. Java Rush images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 13.2 kB

  • Original 99.8 kB
  • After minification 99.8 kB
  • After compression 86.6 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 13.2 kB or 13% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

59

After Optimization

59

  • Images
  • JavaScript

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Java Rush. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

javarush.ru accessibility score

87

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

javarush.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

SEO Factors

javarush.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

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Javarush.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Javarush.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.

Social Sharing Optimization

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