Tools & Wizards About Us
chemicalbiology.yale.edu screenshot

Report Summary

  • 80

    Performance

    Renders faster than
    86% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

chemicalbiology.yale.edu

Graduate Studies in Chemical Biology at Yale | Graduate Studies in Chemical Biology

Page Load Speed

665 ms in total

First Response

68 ms

Resources Loaded

497 ms

Page Rendered

100 ms

chemicalbiology.yale.edu screenshot

About Website

Visit chemicalbiology.yale.edu now to see the best up-to-date Chemical Biology Yale content for United States and also check out these interesting facts you probably never knew about chemicalbiology.yale.edu

Visit chemicalbiology.yale.edu

Key Findings

We analyzed Chemicalbiology.yale.edu page load time and found that the first response time was 68 ms and then it took 597 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

chemicalbiology.yale.edu performance score

80

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

66/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value2.5 s

97/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.015

100/100

15%

TTI (Time to Interactive)

Value4.3 s

84/100

10%

Network Requests Diagram

chemicalbiology.yale.edu

68 ms

addthis_widget.js

16 ms

css_0133d441568fe20cea8db16ecdbf54d9.css

85 ms

js_d9c3e97a9b7eee7634c3551769dbf5ce.js

172 ms

js_02d9208dbab971842a1469f4b18ed844.js

52 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 74% of them (17 requests) were addressed to the original Chemicalbiology.yale.edu, 9% (2 requests) were made to S7.addthis.com and 9% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (172 ms) belongs to the original domain Chemicalbiology.yale.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 471.5 kB (64%)

Content Size

740.2 kB

After Optimization

268.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chemicalbiology.yale.edu main page is 740.2 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. 20% of websites need less resources to load. Javascripts take 633.2 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 41.3 kB

  • Original 60.4 kB
  • After minification 59.0 kB
  • After compression 19.2 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 41.3 kB or 68% of the original size.

Image Optimization

-2%

Potential reduce by 808 B

  • Original 42.2 kB
  • After minification 41.4 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. Chemical Biology Yale images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 426.8 kB

  • Original 633.2 kB
  • After minification 596.8 kB
  • After compression 206.3 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 426.8 kB or 67% of the original size.

CSS Optimization

-59%

Potential reduce by 2.6 kB

  • Original 4.4 kB
  • After minification 3.5 kB
  • After compression 1.8 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. Chemicalbiology.yale.edu needs all CSS files to be minified and compressed as it can save up to 2.6 kB or 59% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (73%)

Requests Now

22

After Optimization

6

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemical Biology Yale. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chemicalbiology.yale.edu

chemicalbiology.yale.edu

68 ms

addthis_widget.js

addthis_widget.js

16 ms

css_0133d441568fe20cea8db16ecdbf54d9.css

css_0133d441568fe20cea8db16ecdbf54d9.css

85 ms

js_d9c3e97a9b7eee7634c3551769dbf5ce.js

js_d9c3e97a9b7eee7634c3551769dbf5ce.js

172 ms

js_02d9208dbab971842a1469f4b18ed844.js

js_02d9208dbab971842a1469f4b18ed844.js

52 ms

analytics.js

analytics.js

34 ms

300lo.json

300lo.json

43 ms

container_shadow_wide.png

container_shadow_wide.png

26 ms

bkgd_topper.gif

bkgd_topper.gif

27 ms

yaleu_white_on_blue.gif

yaleu_white_on_blue.gif

26 ms

go_search_button.gif

go_search_button.gif

29 ms

magic-y.gif

magic-y.gif

29 ms

tophead.jpg

tophead.jpg

92 ms

background_reversed.gif

background_reversed.gif

30 ms

bcl2-2-205x264.jpg

bcl2-2-205x264.jpg

40 ms

yale_logo_whiteonblue.gif

yale_logo_whiteonblue.gif

30 ms

footer_shadow_wide.png

footer_shadow_wide.png

38 ms

sh.8e5f85691f9aaa082472a194.html

sh.8e5f85691f9aaa082472a194.html

21 ms

collect

collect

17 ms

css_795eba0c3137d38bde2b5c32c0b7c919.css

css_795eba0c3137d38bde2b5c32c0b7c919.css

16 ms

mobile.css

mobile.css

16 ms

media-reset.css

media-reset.css

15 ms

nr-100.js

nr-100.js

51 ms

Accessibility Review

chemicalbiology.yale.edu accessibility score

100

Accessibility Issues

Best Practices

chemicalbiology.yale.edu best practices score

75

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

chemicalbiology.yale.edu SEO score

79

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

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

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 Chemicalbiology.yale.edu 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 Chemicalbiology.yale.edu 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

chemicalbiology.yale.edu

Open Graph description is not detected on the main page of Chemical Biology Yale. 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: