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chemleader.com.cn screenshot

Report Summary

  • 64

    Performance

    Renders faster than
    77% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 74

    SEO

    Google-friendlier than
    31% of websites

chemleader.com.cn

Chemleader-API丨Intermediates丨Drug Impurities 丨Small Molecules-Accelerate Your Drug Discovery

Page Load Speed

7.3 sec in total

First Response

664 ms

Resources Loaded

6.2 sec

Page Rendered

458 ms

chemleader.com.cn screenshot

About Website

Click here to check amazing Chemleader content. Otherwise, check out these important facts you probably never knew about chemleader.com.cn

ChemLeader is a professional manufacturer and supplier of New Advanced Pharmaceutical Intermediates, Active Pharmaceutical Ingredients (API) & Drug Impurities.

Visit chemleader.com.cn

Key Findings

We analyzed Chemleader.com.cn page load time and found that the first response time was 664 ms and then it took 6.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

chemleader.com.cn performance score

64

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value3.5 s

63/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value90 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.309

38/100

15%

TTI (Time to Interactive)

Value4.4 s

83/100

10%

Network Requests Diagram

chemleader.com.cn

664 ms

www.chemleader.com.cn

1167 ms

common.js

649 ms

jquery-1.10.2.min.js

1330 ms

jquery.easing.min.js

437 ms

Our browser made a total of 84 requests to load all elements on the main page. We found that all of those requests were addressed to Chemleader.com.cn and no external sources were called. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Chemleader.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 163.9 kB (7%)

Content Size

2.3 MB

After Optimization

2.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemleader.com.cn main page is 2.3 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. 60% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 58.2 kB

  • Original 69.8 kB
  • After minification 66.3 kB
  • After compression 11.6 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 58.2 kB or 83% of the original size.

Image Optimization

-2%

Potential reduce by 44.2 kB

  • Original 2.0 MB
  • After minification 2.0 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. Chemleader images are well optimized though.

JavaScript Optimization

-28%

Potential reduce by 37.9 kB

  • Original 135.3 kB
  • After minification 135.3 kB
  • After compression 97.4 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 37.9 kB or 28% of the original size.

CSS Optimization

-34%

Potential reduce by 23.5 kB

  • Original 69.4 kB
  • After minification 69.4 kB
  • After compression 45.9 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. Chemleader.com.cn needs all CSS files to be minified and compressed as it can save up to 23.5 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (32%)

Requests Now

75

After Optimization

51

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemleader. 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 from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chemleader.com.cn

chemleader.com.cn

664 ms

www.chemleader.com.cn

www.chemleader.com.cn

1167 ms

common.js

common.js

649 ms

jquery-1.10.2.min.js

jquery-1.10.2.min.js

1330 ms

jquery.easing.min.js

jquery.easing.min.js

437 ms

bootstrap.css

bootstrap.css

1143 ms

bootstrap-responsive.css

bootstrap-responsive.css

667 ms

bootstrap.js

bootstrap.js

890 ms

font-awesome.min.css

font-awesome.min.css

884 ms

banner.css

banner.css

868 ms

banner.js

banner.js

1362 ms

colorbox.css

colorbox.css

1088 ms

jquery.colorbox.js

jquery.colorbox.js

1112 ms

component.css

component.css

1111 ms

microfiche.css

microfiche.css

1304 ms

microfiche.js

microfiche.js

1358 ms

flexy-menu.css

flexy-menu.css

1357 ms

flexy-menu2.css

flexy-menu2.css

1373 ms

flexy-menu.js

flexy-menu.js

1521 ms

flexy-menu2.js

flexy-menu2.js

1545 ms

jquery-top-css.css

jquery-top-css.css

1548 ms

basic.css

basic.css

1556 ms

style.css

style.css

1591 ms

default.css

default.css

1590 ms

index.css

index.css

1742 ms

modal.js

modal.js

1344 ms

easing.js

easing.js

1344 ms

fun.js

fun.js

1357 ms

wx.png

wx.png

219 ms

wb.png

wb.png

223 ms

logo.png

logo.png

224 ms

logo-mob.png

logo-mob.png

237 ms

20191122144127.jpg

20191122144127.jpg

899 ms

20191122144258.jpg

20191122144258.jpg

471 ms

b3.jpg

b3.jpg

1731 ms

b4.jpg

b4.jpg

883 ms

p11.jpg

p11.jpg

1319 ms

20190627160564766476.png

20190627160564766476.png

454 ms

20190628132671917191.jpg

20190628132671917191.jpg

888 ms

20190627160652035203.png

20190627160652035203.png

691 ms

20190628132675597559.jpg

20190628132675597559.jpg

911 ms

20190627160677757775.png

20190627160677757775.png

1104 ms

20190628132731753175.jpg

20190628132731753175.jpg

1105 ms

2019722164019.gif

2019722164019.gif

1117 ms

201962514132.gif

201962514132.gif

1131 ms

201962514346.gif

201962514346.gif

1325 ms

201962514524.gif

201962514524.gif

1323 ms

201962514740.gif

201962514740.gif

1336 ms

2019625141131.gif

2019625141131.gif

1352 ms

2019625141826.jpg

2019625141826.jpg

1539 ms

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201962514210.jpg

1541 ms

2019625142258.jpg

2019625142258.jpg

1545 ms

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2019625142554.jpg

1555 ms

2019625142726.png

2019625142726.png

1570 ms

2019625142830.gif

2019625142830.gif

1760 ms

yaben_0111.jpg

yaben_0111.jpg

1761 ms

yaben_02.jpg

yaben_02.jpg

1767 ms

yaben_03.jpg

yaben_03.jpg

1774 ms

yaben_04.jpg

yaben_04.jpg

1789 ms

mm11.png

mm11.png

1946 ms

mm22.png

mm22.png

1966 ms

mm33.png

mm33.png

1952 ms

email.png

email.png

1950 ms

search.png

search.png

1934 ms

inc_inquiry_tc_mob.asp

inc_inquiry_tc_mob.asp

1811 ms

inc_inquiry_tc_pc.asp

inc_inquiry_tc_pc.asp

1958 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1976 ms

line.png

line.png

1968 ms

m-bg-x.png1

m-bg-x.png1

1757 ms

bg1-1.png11

bg1-1.png11

1742 ms

m-bg-x.png11

m-bg-x.png11

1537 ms

titl_bg1.png

titl_bg1.png

1501 ms

home-bt-xia1.jpg

home-bt-xia1.jpg

1528 ms

titl_bg.png

titl_bg.png

1523 ms

zeren_bg.jpg

zeren_bg.jpg

1751 ms

master.png

master.png

1326 ms

themes.png

themes.png

1340 ms

overlay.png

overlay.png

1487 ms

404.html

404.html

498 ms

404.html

404.html

581 ms

404.html

404.html

640 ms

404.html

404.html

663 ms

404.html

404.html

536 ms

404.html

404.html

586 ms

Accessibility Review

chemleader.com.cn accessibility score

52

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

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.

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

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

chemleader.com.cn best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

chemleader.com.cn SEO score

74

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

robots.txt is not valid

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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemleader.com.cn can be misinterpreted by Google and other search engines. Our service has detected that English 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 Chemleader.com.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

chemleader.com.cn

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