Access chemm.cn. 化工机械网——化工设备与机械行业B2B专业平台

chemm.cn screenshot

65

Performance

Renders faster than
79% of other websites
48

Accessibility

Visual factors better than
that of 20% of websites
58

Best Practices

More advanced features
available than in
19% of websites
54

SEO

Google-friendlier than
19% of websites

First Response

545 ms

Resources Loaded

39.9 sec

Page Rendered

532 ms

chemm.cn screenshot

About Website

Welcome to chemm.cn homepage info - get ready to check Chemm best content for China right away, or after learning these important things about chemm.cn

化工机械网，汇集了化工设备机械行业众多优秀的产品及数据，是集资讯，技术，展会信息，招聘求职，协会，刊物等信息的优秀综合网站。

Visit chemm.cn

Key Findings

We analyzed Chemm.cn page load time and found that the first response time was 545 ms and then it took 40.4 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.

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

82/100

10%

LCP (Largest Contentful Paint)

Value7.8 s

3/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value170 ms

93/100

30%

CLS (Cumulative Layout Shift)

Value0.024

100/100

15%

TTI (Time to Interactive)

Value4.4 s

84/100

10%

chemm.cn

545 ms

www.chemm.cn

8088 ms

default.css

1496 ms

HomePage.css

2814 ms

jquery-1.4.4.min.js

6043 ms

Our browser made a total of 173 requests to load all elements on the main page. We found that 89% of them (154 requests) were addressed to the original Chemm.cn, 2% (3 requests) were made to S.lianmeng.360.cn and 1% (2 requests) were made to Kefu6.kuaishang.cn. The less responsive or slowest element that took the longest time to load (19.6 sec) relates to the external source File6.kuaishang.cn.

Content Size

697.5 kB

After Optimization

353.3 kB

In fact, the total size of Chemm.cn main page is 697.5 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. 40% of websites need less resources to load. Images take 258.7 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 124.9 kB

Original 152.0 kB
After minification 141.0 kB
After compression 27.1 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 124.9 kB or 82% of the original size.

Image Optimization

-8%

Potential reduce by 20.9 kB

Original 258.7 kB
After minification 237.8 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. Chemm images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 168.0 kB

Original 250.9 kB
After minification 249.8 kB
After compression 82.9 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 168.0 kB or 67% of the original size.

CSS Optimization

-85%

Potential reduce by 30.5 kB

Original 35.9 kB
After minification 28.8 kB
After compression 5.4 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. Chemm.cn needs all CSS files to be minified and compressed as it can save up to 30.5 kB or 85% of the original size.

Requests Now

169

After Optimization

149

The browser has sent 169 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

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

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

<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

High

<object> elements do not have alternate text

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

High

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

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

High

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

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

High

Document uses plugins

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 Chemm.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 Chemm.cn 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

chemm.cn

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