Tools & Wizards About Us
uvcn.cn screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

uvcn.cn

北京航天宏达光电技术股份有限公司

Page Load Speed

24.2 sec in total

First Response

2.1 sec

Resources Loaded

21.8 sec

Page Rendered

389 ms

uvcn.cn screenshot

About Website

Visit uvcn.cn now to see the best up-to-date Uvcn content for China and also check out these interesting facts you probably never knew about uvcn.cn

Visit uvcn.cn

Key Findings

We analyzed Uvcn.cn page load time and found that the first response time was 2.1 sec and then it took 22.1 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

uvcn.cn performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value10.2 s

8/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.106

88/100

15%

TTI (Time to Interactive)

Value7.7 s

45/100

10%

Network Requests Diagram

uvcn.cn

2053 ms

common.css

869 ms

base.js

2528 ms

common.js

1175 ms

form.js

1330 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 95% of them (35 requests) were addressed to the original Uvcn.cn, 3% (1 request) were made to Img03.taobaocdn.com and 3% (1 request) were made to Pub.idqqimg.com. The less responsive or slowest element that took the longest time to load (15.4 sec) belongs to the original domain Uvcn.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 132.4 kB (14%)

Content Size

947.4 kB

After Optimization

815.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Uvcn.cn main page is 947.4 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 5% of websites need less resources to load. Images take 784.1 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 22.6 kB

  • Original 28.1 kB
  • After minification 26.8 kB
  • After compression 5.5 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 22.6 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 13.8 kB

  • Original 784.1 kB
  • After minification 770.4 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. Uvcn images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 90.1 kB

  • Original 126.8 kB
  • After minification 110.5 kB
  • After compression 36.7 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 90.1 kB or 71% of the original size.

CSS Optimization

-71%

Potential reduce by 6.0 kB

  • Original 8.4 kB
  • After minification 6.9 kB
  • After compression 2.4 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. Uvcn.cn needs all CSS files to be minified and compressed as it can save up to 6.0 kB or 71% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (29%)

Requests Now

34

After Optimization

24

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Uvcn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

uvcn.cn

uvcn.cn

2053 ms

common.css

common.css

869 ms

base.js

base.js

2528 ms

common.js

common.js

1175 ms

form.js

form.js

1330 ms

blockui.js

blockui.js

1243 ms

A.css

A.css

932 ms

transform.js

transform.js

1849 ms

productclass_dolphin.css

productclass_dolphin.css

887 ms

productlist.css

productlist.css

840 ms

productlist_roll.css

productlist_roll.css

973 ms

productlist_roll.js

productlist_roll.js

3765 ms

A.css

A.css

1039 ms

bg.gif

bg.gif

728 ms

1433597452.jpg

1433597452.jpg

1184 ms

1280458783.jpg

1280458783.jpg

1029 ms

1280467807.jpg

1280467807.jpg

1084 ms

more.gif

more.gif

257 ms

1433720660.jpg

1433720660.jpg

15411 ms

1433603515.jpg

1433603515.jpg

4493 ms

1433601874.jpg

1433601874.jpg

5056 ms

1433719802.jpg

1433719802.jpg

2977 ms

1433846026.jpg

1433846026.jpg

5852 ms

1433719684.jpg

1433719684.jpg

11369 ms

1433688775.jpg

1433688775.jpg

9434 ms

1433720974.jpg

1433720974.jpg

6538 ms

1280467896.jpg

1280467896.jpg

6162 ms

1262661247.gif

1262661247.gif

6535 ms

1262918621.gif

1262918621.gif

6667 ms

cbg.jpg

cbg.jpg

6783 ms

title.jpg

title.jpg

6968 ms

title.jpg

title.jpg

9492 ms

dot2.jpg

dot2.jpg

7059 ms

top.gif

top.gif

7273 ms

T1FXHXXahjXXXAK3zo-77-18.gif

T1FXHXXahjXXXAK3zo-77-18.gif

672 ms

arrow.jpg

arrow.jpg

5532 ms

button_old_11.gif

button_old_11.gif

2392 ms

Accessibility Review

uvcn.cn accessibility score

69

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

uvcn.cn best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

uvcn.cn SEO score

90

Search Engine Optimization Advices

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

    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 Uvcn.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 Uvcn.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

uvcn.cn

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