Tools & Wizards About Us
chemm.cn screenshot

Report Summary

  • 64

    Performance

    Renders faster than
    77% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

chemm.cn

钻化工机械网——化工设备与机械行业B2B专业平台

Page Load Speed

10.8 sec in total

First Response

712 ms

Resources Loaded

9.8 sec

Page Rendered

271 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 712 ms and then it took 10.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

chemm.cn performance score

64

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value5.2 s

23/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value130 ms

96/100

30%

CLS (Cumulative Layout Shift)

Value0.024

100/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

chemm.cn

712 ms

www.chemm.cn

1700 ms

visit.js

454 ms

default.css

463 ms

HomePage.css

708 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 86% of them (90 requests) were addressed to the original Chemm.cn, 5% (5 requests) were made to Pos.baidu.com and 3% (3 requests) were made to Cpro.baidustatic.com. The less responsive or slowest element that took the longest time to load (5.4 sec) belongs to the original domain Chemm.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 196.6 kB (36%)

Content Size

551.0 kB

After Optimization

354.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemm.cn main page is 551.0 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. 45% of websites need less resources to load. Images take 293.8 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 100.9 kB

  • Original 122.9 kB
  • After minification 119.0 kB
  • After compression 21.9 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 100.9 kB or 82% of the original size.

Image Optimization

-2%

Potential reduce by 6.8 kB

  • Original 293.8 kB
  • After minification 287.0 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

-66%

Potential reduce by 77.3 kB

  • Original 116.7 kB
  • After minification 115.6 kB
  • After compression 39.4 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 77.3 kB or 66% of the original size.

CSS Optimization

-65%

Potential reduce by 11.5 kB

  • Original 17.6 kB
  • After minification 15.5 kB
  • After compression 6.1 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. Chemm.cn needs all CSS files to be minified and compressed as it can save up to 11.5 kB or 65% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (25%)

Requests Now

102

After Optimization

77

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 102 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 12 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

chemm.cn

chemm.cn

712 ms

www.chemm.cn

www.chemm.cn

1700 ms

visit.js

visit.js

454 ms

default.css

default.css

463 ms

HomePage.css

HomePage.css

708 ms

jquery-1.4.4.min.js

jquery-1.4.4.min.js

1185 ms

StrEncryption.js

StrEncryption.js

476 ms

jquery.cookies.2.2.0.min.js

jquery.cookies.2.2.0.min.js

681 ms

c.js

c.js

1328 ms

Ad_HomePage.js

Ad_HomePage.js

252 ms

chemm2012.jpg

chemm2012.jpg

5437 ms

Logo.jpg

Logo.jpg

1538 ms

new.gif

new.gif

235 ms

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237 ms

index_06.jpg

index_06.jpg

240 ms

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280 ms

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466 ms

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719 ms

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951 ms

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1026 ms

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1189 ms

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1198 ms

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1419 ms

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1441 ms

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1447 ms

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1521 ms

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1659 ms

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1687 ms

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1769 ms

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1773 ms

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1885 ms

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1915 ms

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1924 ms

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2015 ms

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1977 ms

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1886 ms

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1919 ms

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1926 ms

2010BgImg.gif

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2963 ms

search.png

search.png

1801 ms

ackm

ackm

1280 ms

ucbm

ucbm

1382 ms

hm.js

hm.js

463 ms

auto_dup

auto_dup

720 ms

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695 ms

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735 ms

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2529 ms

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986 ms

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1349 ms

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1192 ms

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2746 ms

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2733 ms

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2895 ms

hm.js

hm.js

1112 ms

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3123 ms

close.gif

close.gif

2983 ms

ackm

ackm

388 ms

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3224 ms

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3117 ms

ackm

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267 ms

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3142 ms

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4787 ms

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4781 ms

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4211 ms

logo.css

logo.css

888 ms

logo.js

logo.js

951 ms

ctm3.js

ctm3.js

1423 ms

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202207291339300705.gif

3083 ms

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3103 ms

hm.gif

hm.gif

311 ms

adx.php

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1177 ms

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2098 ms

se.jpg

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1089 ms

Accessibility Review

chemm.cn accessibility score

48

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

<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

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

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>).

Best Practices

chemm.cn 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

SEO Factors

chemm.cn SEO score

54

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

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

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: