Tools & Wizards About Us
web.cas.org screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 0

    Best Practices

  • 91

    SEO

    Google-friendlier than
    70% of websites

web.cas.org

Empowering Innovation & Scientific Discoveries | CAS

Page Load Speed

4.4 sec in total

First Response

109 ms

Resources Loaded

3.8 sec

Page Rendered

475 ms

web.cas.org screenshot

About Website

Click here to check amazing Web CAS content for China. Otherwise, check out these important facts you probably never knew about web.cas.org

CAS provides solutions and services that help empower scientific discoveries. Learn how CAS can facilitate your research and drive innovation.

Visit web.cas.org

Key Findings

We analyzed Web.cas.org page load time and found that the first response time was 109 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

web.cas.org performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value3,910 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.017

100/100

15%

TTI (Time to Interactive)

Value17.8 s

4/100

10%

Network Requests Diagram

web.cas.org

109 ms

www.cas.org

2422 ms

cas-org.dd3b4ecc0.min.css

67 ms

api.js

84 ms

osano.js

332 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Web.cas.org, 33% (16 requests) were made to Cdn.prod.website-files.com and 8% (4 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Cas.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 203.8 kB (13%)

Content Size

1.6 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Web.cas.org main page is 1.6 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. 65% of websites need less resources to load. Javascripts take 810.4 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 48.8 kB

  • Original 63.0 kB
  • After minification 62.6 kB
  • After compression 14.2 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 48.8 kB or 77% of the original size.

Image Optimization

-0%

Potential reduce by 4 B

  • Original 654.5 kB
  • After minification 654.5 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. Web CAS images are well optimized though.

JavaScript Optimization

-19%

Potential reduce by 154.9 kB

  • Original 810.4 kB
  • After minification 810.4 kB
  • After compression 655.4 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 154.9 kB or 19% of the original size.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 62.8 kB
  • After minification 62.8 kB
  • After compression 62.8 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. Web.cas.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 22 (54%)

Requests Now

41

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Web CAS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

web.cas.org

web.cas.org

109 ms

www.cas.org

www.cas.org

2422 ms

cas-org.dd3b4ecc0.min.css

cas-org.dd3b4ecc0.min.css

67 ms

api.js

api.js

84 ms

osano.js

osano.js

332 ms

js

js

95 ms

10047855-100411829.js

10047855-100411829.js

85 ms

cmsslider.js

cmsslider.js

81 ms

jquery-3.5.1.min.dc5e7f18c8.js

jquery-3.5.1.min.dc5e7f18c8.js

47 ms

cas-org.873ffd425.js

cas-org.873ffd425.js

82 ms

_Incapsula_Resource

_Incapsula_Resource

27 ms

recaptcha__en.js

recaptcha__en.js

24 ms

gtm.js

gtm.js

208 ms

65babbec1c38d54bcc033f7c_CAS_PREF_3C_RGB_POS.svg

65babbec1c38d54bcc033f7c_CAS_PREF_3C_RGB_POS.svg

188 ms

65d76903e33f7dc9cc3d5fdb_homepage-slider-overlay.svg

65d76903e33f7dc9cc3d5fdb_homepage-slider-overlay.svg

182 ms

664babff29dfd02b6e98a7a4_1600-GettyImages-1184397025.jpg

664babff29dfd02b6e98a7a4_1600-GettyImages-1184397025.jpg

186 ms

66633d0d4c63d0fa94e91c85_GettyImages-1410795090_CAS-Insights-Hero-Image.jpg

66633d0d4c63d0fa94e91c85_GettyImages-1410795090_CAS-Insights-Hero-Image.jpg

276 ms

65d76c6660edefff28aba1c6_GettyImages-641068114_CAS-Web-Carousel.webp

65d76c6660edefff28aba1c6_GettyImages-641068114_CAS-Web-Carousel.webp

222 ms

662180c2086c4365ca2603e9_GettyImages-1322220448-FL.jpg

662180c2086c4365ca2603e9_GettyImages-1322220448-FL.jpg

221 ms

654a6394d4ff3cc3939be648_featured_solution-hex.svg

654a6394d4ff3cc3939be648_featured_solution-hex.svg

218 ms

6681b389bd965abd616f1f00_6650c6568f14bd496eae9ea3_GettyImages-182506763_CAS-Insights-Hero-Image.webp

6681b389bd965abd616f1f00_6650c6568f14bd496eae9ea3_GettyImages-182506763_CAS-Insights-Hero-Image.webp

219 ms

65cb8683b577ab7b6195525a_Left%20Arrow%20Long.svg

65cb8683b577ab7b6195525a_Left%20Arrow%20Long.svg

274 ms

65cb8683b577ab7b6195525b_Right%20Arrow%20Long.svg

65cb8683b577ab7b6195525b_Right%20Arrow%20Long.svg

275 ms

661fe9a42745c96ee2a01922_hex-cas-data.svg

661fe9a42745c96ee2a01922_hex-cas-data.svg

276 ms

66aa5582c78e9ebf9168b6e5_GettyImages-1328336839-2048x2048.jpg

66aa5582c78e9ebf9168b6e5_GettyImages-1328336839-2048x2048.jpg

289 ms

66aa584a156b861ac9002f16_GettyImages-1623197497_CAS-Insights-Hero-Image.jpg

66aa584a156b861ac9002f16_GettyImages-1623197497_CAS-Insights-Hero-Image.jpg

348 ms

66a11da6e86a514a03032f33_INSGENENGSOC102127-Nanotechnology-mind-map-2-Hero.webp

66a11da6e86a514a03032f33_INSGENENGSOC102127-Nanotechnology-mind-map-2-Hero.webp

297 ms

650d8e5375429c14c1b43968_font.woff

650d8e5375429c14c1b43968_font.woff

284 ms

650d8f4e13fd8b986a1fae7b_TypeTogether%20-%20SoleilSb.otf

650d8f4e13fd8b986a1fae7b_TypeTogether%20-%20SoleilSb.otf

349 ms

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

1 ms

650d8e6e5de4c8566e680d18_font.woff

650d8e6e5de4c8566e680d18_font.woff

349 ms

_Incapsula_Resource

_Incapsula_Resource

49 ms

js

js

110 ms

fbevents.js

fbevents.js

64 ms

insight.min.js

insight.min.js

217 ms

hotjar-3155961.js

hotjar-3155961.js

216 ms

uwt.js

uwt.js

87 ms

loader.js

loader.js

29 ms

js

js

158 ms

tags.js

tags.js

223 ms

3ca2c87c0717e7dd.min.js

3ca2c87c0717e7dd.min.js

79 ms

call-tracking_9.js

call-tracking_9.js

14 ms

1405100283348865

1405100283348865

184 ms

adsct

adsct

249 ms

adsct

adsct

310 ms

modules.8da33a8f469c3b5ffcec.js

modules.8da33a8f469c3b5ffcec.js

31 ms

wcm

wcm

17 ms

reveal

reveal

132 ms

tracking.min.js

tracking.min.js

218 ms

Accessibility Review

web.cas.org accessibility score

98

Accessibility Issues

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

Links do not have a discernible name

SEO Factors

web.cas.org SEO score

91

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Web.cas.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Web.cas.org 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

web.cas.org

Open Graph data is detected on the main page of Web CAS. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: