Tools & Wizards About Us
zhangviolin.org screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 72

    SEO

    Google-friendlier than
    31% of websites

zhangviolin.org

Zhang Violin Method - modern violin teaching method

Page Load Speed

50.7 sec in total

First Response

2.1 sec

Resources Loaded

48.4 sec

Page Rendered

225 ms

zhangviolin.org screenshot

About Website

Welcome to zhangviolin.org homepage info - get ready to check Zhang Violin best content for United States right away, or after learning these important things about zhangviolin.org

Zhang Violin system provides more than 6000s video online. It uses sound to teach sound, motion to teach motion, which greatly inspires young students and makes learning more efficient and full with f...

Visit zhangviolin.org

Key Findings

We analyzed Zhangviolin.org page load time and found that the first response time was 2.1 sec and then it took 48.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 5 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

zhangviolin.org performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value10.3 s

0/100

25%

SI (Speed Index)

Value9.3 s

12/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0.264

46/100

15%

TTI (Time to Interactive)

Value9.9 s

27/100

10%

Network Requests Diagram

zhangviolin.org

2068 ms

css

32 ms

css

52 ms

css

56 ms

rev-settings.css

1970 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 82% of them (42 requests) were addressed to the original Zhangviolin.org, 6% (3 requests) were made to Fonts.googleapis.com and 4% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (20.4 sec) belongs to the original domain Zhangviolin.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 123.7 kB (14%)

Content Size

863.2 kB

After Optimization

739.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zhangviolin.org main page is 863.2 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. 25% of websites need less resources to load. Images take 508.8 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 38.1 kB

  • Original 48.7 kB
  • After minification 40.0 kB
  • After compression 10.6 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 8.7 kB, which is 18% 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 38.1 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 2.2 kB

  • Original 508.8 kB
  • After minification 506.6 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. Zhang Violin images are well optimized though.

JavaScript Optimization

-22%

Potential reduce by 43.6 kB

  • Original 202.4 kB
  • After minification 202.4 kB
  • After compression 158.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 43.6 kB or 22% of the original size.

CSS Optimization

-39%

Potential reduce by 39.9 kB

  • Original 103.2 kB
  • After minification 103.1 kB
  • After compression 63.4 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. Zhangviolin.org needs all CSS files to be minified and compressed as it can save up to 39.9 kB or 39% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (52%)

Requests Now

42

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zhang Violin. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zhangviolin.org

zhangviolin.org

2068 ms

css

css

32 ms

css

css

52 ms

css

css

56 ms

rev-settings.css

rev-settings.css

1970 ms

bootstrap.css

bootstrap.css

1288 ms

icons-styles.css

icons-styles.css

1757 ms

template.css

template.css

4709 ms

responsive-devices.css

responsive-devices.css

643 ms

dark-cyan.css

dark-cyan.css

1214 ms

updates.css

updates.css

1241 ms

custom.css

custom.css

1427 ms

jquery.min.js

jquery.min.js

6986 ms

WebResource.axd

WebResource.axd

2020 ms

jquery.themepunch.plugins.min.js

jquery.themepunch.plugins.min.js

6106 ms

jquery.themepunch.revolution.min.js

jquery.themepunch.revolution.min.js

7772 ms

element.js

element.js

47 ms

modernizr.custom.js

modernizr.custom.js

1974 ms

bootstrap.js

bootstrap.js

2448 ms

clean-js-plugins.js

clean-js-plugins.js

4840 ms

cleanlab_script.js

cleanlab_script.js

2662 ms

classie.js

classie.js

2881 ms

mlpushmenu.js

mlpushmenu.js

3858 ms

logo.png

logo.png

767 ms

logo_white.png

logo_white.png

831 ms

08e644c2-c300-48fc-ab7c-b892210971c8.jpg

08e644c2-c300-48fc-ab7c-b892210971c8.jpg

20367 ms

d315aee9-6ef0-4112-b2a3-8fac4b8805fe.JPG

d315aee9-6ef0-4112-b2a3-8fac4b8805fe.JPG

8463 ms

cdc60ee7-4600-4d3b-bf2e-0f267e1b89b5.jpg

cdc60ee7-4600-4d3b-bf2e-0f267e1b89b5.jpg

11616 ms

3e1f7165-f616-4f10-a4d7-4a658341bfaa.jpg

3e1f7165-f616-4f10-a4d7-4a658341bfaa.jpg

20368 ms

e133329e-f6f8-40e3-8c1f-903e8dea761b.jpg

e133329e-f6f8-40e3-8c1f-903e8dea761b.jpg

13175 ms

banner_mobile_EN2024.jpg

banner_mobile_EN2024.jpg

16730 ms

9b8d3ae4-4fed-4566-88b6-c92001bc372c.jpg

9b8d3ae4-4fed-4566-88b6-c92001bc372c.jpg

6165 ms

a0881f06-40d4-4b6f-be00-3be0ca84d4a2.jpg

a0881f06-40d4-4b6f-be00-3be0ca84d4a2.jpg

13251 ms

7ba258f9-a938-4898-b2c7-64ec867c895d.jpg

7ba258f9-a938-4898-b2c7-64ec867c895d.jpg

11915 ms

4d2ad73a-20b3-4ce7-8c37-314c79f81eb0.jpg

4d2ad73a-20b3-4ce7-8c37-314c79f81eb0.jpg

12249 ms

e6710243-894f-4fd9-acd2-9b88c24eaa0f.jpg

e6710243-894f-4fd9-acd2-9b88c24eaa0f.jpg

14814 ms

0b5de596-becc-451d-99b5-837febc5caa7.jpg

0b5de596-becc-451d-99b5-837febc5caa7.jpg

17635 ms

ea5d5111-815a-41b1-8ff7-1742ab9635ae.jpg

ea5d5111-815a-41b1-8ff7-1742ab9635ae.jpg

14668 ms

acf6f216-ba27-4733-94ec-2ba49c661380.jpg

acf6f216-ba27-4733-94ec-2ba49c661380.jpg

15828 ms

icomoon.svg

icomoon.svg

20303 ms

icomoon.woff

icomoon.woff

20302 ms

1Ptxg8zYS_SKggPN4iEgvnHyvveLxVvaorCIPrc.woff

1Ptxg8zYS_SKggPN4iEgvnHyvveLxVvaorCIPrc.woff

26 ms

timer.png

timer.png

15977 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

12 ms

analytics.js

analytics.js

18 ms

collect

collect

52 ms

loader.gif

loader.gif

15373 ms

bullet.png

bullet.png

17009 ms

js

js

60 ms

icomoon.ttf

icomoon.ttf

15318 ms

08e644c2-c300-48fc-ab7c-b892210971c8.jpg

08e644c2-c300-48fc-ab7c-b892210971c8.jpg

19976 ms

Accessibility Review

zhangviolin.org accessibility score

62

Accessibility Issues

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

zhangviolin.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

zhangviolin.org SEO score

72

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    EN

  • Encoding

    UTF-8

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

zhangviolin.org

Open Graph description is not detected on the main page of Zhang Violin. 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: