Report Summary

  • 13

    Performance

    Renders faster than
    25% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

cnwb.net

中国防水网|中国建筑防水协会

Page Load Speed

29.6 sec in total

First Response

6.2 sec

Resources Loaded

23.1 sec

Page Rendered

282 ms

cnwb.net screenshot

About Website

Visit cnwb.net now to see the best up-to-date Cnwb content and also check out these interesting facts you probably never knew about cnwb.net

中国建筑防水协会

Visit cnwb.net

Key Findings

We analyzed Cnwb.net page load time and found that the first response time was 6.2 sec and then it took 23.4 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

cnwb.net performance score

13

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value7.4 s

4/100

25%

SI (Speed Index)

Value20.6 s

0/100

10%

TBT (Total Blocking Time)

Value1,410 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.614

10/100

15%

TTI (Time to Interactive)

Value8.7 s

36/100

10%

Network Requests Diagram

cnwb.net

6246 ms

css.css

1090 ms

Dv_Window.js

726 ms

AC_RunActiveContent.js

1084 ms

lds.jpg

1484 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 93% of them (41 requests) were addressed to the original Cnwb.net, 5% (2 requests) were made to Hm.baidu.com and 2% (1 request) were made to Eiv.baidu.com. The less responsive or slowest element that took the longest time to load (19.9 sec) belongs to the original domain Cnwb.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 165.0 kB (66%)

Content Size

249.8 kB

After Optimization

84.8 kB

In fact, the total size of Cnwb.net main page is 249.8 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. 15% of websites need less resources to load. HTML takes 128.0 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 115.3 kB

  • Original 128.0 kB
  • After minification 96.7 kB
  • After compression 12.7 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 31.2 kB, which is 24% 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 115.3 kB or 90% of the original size.

Image Optimization

-36%

Potential reduce by 38.6 kB

  • Original 108.0 kB
  • After minification 69.4 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. Obviously, Cnwb needs image optimization as it can save up to 38.6 kB or 36% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-81%

Potential reduce by 6.7 kB

  • Original 8.3 kB
  • After minification 5.2 kB
  • After compression 1.6 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 6.7 kB or 81% of the original size.

CSS Optimization

-79%

Potential reduce by 4.4 kB

  • Original 5.5 kB
  • After minification 4.5 kB
  • After compression 1.1 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. Cnwb.net needs all CSS files to be minified and compressed as it can save up to 4.4 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 15 (37%)

Requests Now

41

After Optimization

26

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cnwb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

cnwb.net accessibility score

41

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

[id] attributes on active, focusable elements are not unique

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

cnwb.net best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

cnwb.net SEO score

76

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

High

Page is blocked from indexing

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

    GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cnwb.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 Cnwb.net main page’s claimed encoding is gb2312. 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

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