Tools & Wizards About Us
runjs.cn screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 48% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

runjs.cn

RunJS

Page Load Speed

23.7 sec in total

First Response

1.5 sec

Resources Loaded

22 sec

Page Rendered

245 ms

runjs.cn screenshot

About Website

Click here to check amazing RunJS content for China. Otherwise, check out these important facts you probably never knew about runjs.cn

开源前端代码分享系统

Visit runjs.cn

Key Findings

We analyzed Runjs.cn page load time and found that the first response time was 1.5 sec and then it took 22.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

runjs.cn performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value37.0 s

0/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value3.1 s

95/100

10%

Network Requests Diagram

runjs.cn

1474 ms

index.css

495 ms

jquery-1.8.2.min.js

3632 ms

86575c84e603d833376357ae80d05b11size=100

224 ms

logo.png

486 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 95% of them (21 requests) were addressed to the original Runjs.cn, 5% (1 request) were made to Gravatar.com. The less responsive or slowest element that took the longest time to load (16.8 sec) belongs to the original domain Runjs.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 92.5 kB (43%)

Content Size

216.6 kB

After Optimization

124.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Runjs.cn main page is 216.6 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. Only 10% of websites need less resources to load. Javascripts take 104.1 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 9.4 kB

  • Original 13.3 kB
  • After minification 12.1 kB
  • After compression 3.9 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 9.4 kB or 70% of the original size.

Image Optimization

-10%

Potential reduce by 9.1 kB

  • Original 89.9 kB
  • After minification 80.8 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. RunJS images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 66.7 kB

  • Original 104.1 kB
  • After minification 104.1 kB
  • After compression 37.4 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 66.7 kB or 64% of the original size.

CSS Optimization

-78%

Potential reduce by 7.2 kB

  • Original 9.2 kB
  • After minification 7.3 kB
  • After compression 2.0 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. Runjs.cn needs all CSS files to be minified and compressed as it can save up to 7.2 kB or 78% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

21

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of RunJS. According to our analytics all requests are already optimized.

Network Requests Diagram

runjs.cn

runjs.cn

1474 ms

index.css

index.css

495 ms

jquery-1.8.2.min.js

jquery-1.8.2.min.js

3632 ms

86575c84e603d833376357ae80d05b11size=100

86575c84e603d833376357ae80d05b11size=100

224 ms

logo.png

logo.png

486 ms

bg-black.gif

bg-black.gif

397 ms

square.jpg

square.jpg

4415 ms

editor.jpg

editor.jpg

2981 ms

plugin_color_picker.png

plugin_color_picker.png

7266 ms

56556_100.jpg

56556_100.jpg

2577 ms

33901_100.jpg

33901_100.jpg

3498 ms

48312_100.jpg

48312_100.jpg

2562 ms

56216_100.jpg

56216_100.jpg

4597 ms

56861_100.jpg

56861_100.jpg

3628 ms

52669_100.jpg

52669_100.jpg

16833 ms

53442_100.jpg

53442_100.jpg

5497 ms

41025_100.jpg

41025_100.jpg

5668 ms

56865_100.jpg

56865_100.jpg

6169 ms

48513_100.jpg

48513_100.jpg

5639 ms

56354_100.jpg

56354_100.jpg

6509 ms

56864_100.jpg

56864_100.jpg

6108 ms

56757_100.jpg

56757_100.jpg

7317 ms

Accessibility Review

runjs.cn accessibility score

79

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.

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

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

runjs.cn best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

runjs.cn 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

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Runjs.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Runjs.cn 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

runjs.cn

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