Access vi21.net. 视觉客

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.8 s

67/100

10%

vi21.net

747 ms

style_2_common.css

972 ms

style_2_portal_index.css

629 ms

common.js

702 ms

style_2_widthauto.css

646 ms

Our browser made a total of 110 requests to load all elements on the main page. We found that 77% of them (85 requests) were addressed to the original Vi21.net, 5% (5 requests) were made to Q.qlogo.cn and 4% (4 requests) were made to Static.duoshuo.com. The less responsive or slowest element that took the longest time to load (15.8 sec) relates to the external source Q.qlogo.cn.

Content Size

2.1 MB

After Optimization

1.6 MB

In fact, the total size of Vi21.net main page is 2.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 123.9 kB

Original 187.2 kB
After minification 184.8 kB
After compression 63.3 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 123.9 kB or 66% of the original size.

Image Optimization

-8%

Potential reduce by 117.8 kB

Original 1.5 MB
After minification 1.4 MB

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. Vi 21 images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 137.9 kB

Original 220.0 kB
After minification 210.3 kB
After compression 82.2 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 137.9 kB or 63% of the original size.

CSS Optimization

-79%

Potential reduce by 122.8 kB

Original 155.2 kB
After minification 149.5 kB
After compression 32.4 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. Vi21.net needs all CSS files to be minified and compressed as it can save up to 122.8 kB or 79% of the original size.

Requests Now

107

After Optimization

The browser has sent 107 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vi 21. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

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

High

Links are not crawlable

High

robots.txt is not valid

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

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vi21.net 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 Vi21.net main page’s claimed encoding is gbk. 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

vi21.net

Open Graph description is not detected on the main page of Vi 21. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

视觉客

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

vi21.net

style_2_common.css

style_2_portal_index.css

common.js

style_2_widthauto.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

vi21.net

style_2_common.css

style_2_portal_index.css

common.js

style_2_widthauto.css

portal.js

css.css

o.php

logging.js

jquery-1.4.3.min.js

jquery.scrollTo.js

index.css

crystal2.js

wxpublic.css

ping.js

stat.php

discuz_tips.js

qrcode.js

arrwd.gif

123227qavzvmpnpe4m3301.jpg

pinupp.jpg

hzart.jpg

120756ctv3uv7v33v3qtu4.jpg

hangzhou.jpg

search-button-bg.png

qq_login.gif

logo.png

9323_461_316.jpg

8938_144_144.jpg

8937_144_144.jpg

9324_461_316.jpg

9290_144_144.jpg

8931_144_144.jpg

9321_461_316.jpg

9269_144_144.jpg

9074_144_144.jpg

9324_144_144.jpg

9323_144_144.jpg

9322_144_144.jpg

9321_144_144.jpg

9320_144_144.jpg

wxbt.png

wxlogo.jpg