Tools & Wizards About Us
coronavirus.duke.edu screenshot

Report Summary

  • 69

    Performance

    Renders faster than
    80% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

coronavirus.duke.edu

Duke’s Coronavirus Response - Information & Updates

Page Load Speed

1.4 sec in total

First Response

129 ms

Resources Loaded

818 ms

Page Rendered

501 ms

coronavirus.duke.edu screenshot

About Website

Visit coronavirus.duke.edu now to see the best up-to-date Coronavirus Duke content for United States and also check out these interesting facts you probably never knew about coronavirus.duke.edu

Get the latest updates and information about the 2019 Novel Coronavirus (COVID-19) and changes that affect the Duke community.

Visit coronavirus.duke.edu

Key Findings

We analyzed Coronavirus.duke.edu page load time and found that the first response time was 129 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

coronavirus.duke.edu performance score

69

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

33/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value3.5 s

87/100

10%

TBT (Total Blocking Time)

Value110 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.025

100/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

coronavirus.duke.edu

129 ms

coronavirus.duke.edu

118 ms

js

100 ms

style.min.css

77 ms

duke-alertbar-public.css

75 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 67% of them (26 requests) were addressed to the original Coronavirus.duke.edu, 10% (4 requests) were made to Fonts.gstatic.com and 8% (3 requests) were made to Assets.styleguide.duke.edu. The less responsive or slowest element that took the longest time to load (333 ms) belongs to the original domain Coronavirus.duke.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 117.6 kB (5%)

Content Size

2.4 MB

After Optimization

2.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Coronavirus.duke.edu main page is 2.4 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. 35% of websites need less resources to load. Images take 2.3 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 49.1 kB

  • Original 63.4 kB
  • After minification 61.9 kB
  • After compression 14.3 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 49.1 kB or 77% of the original size.

Image Optimization

-3%

Potential reduce by 59.2 kB

  • Original 2.3 MB
  • After minification 2.2 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. Coronavirus Duke images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 941 B

  • Original 49.8 kB
  • After minification 49.7 kB
  • After compression 48.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-17%

Potential reduce by 8.3 kB

  • Original 49.7 kB
  • After minification 49.6 kB
  • After compression 41.4 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. Coronavirus.duke.edu needs all CSS files to be minified and compressed as it can save up to 8.3 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (68%)

Requests Now

28

After Optimization

9

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coronavirus Duke. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

coronavirus.duke.edu

coronavirus.duke.edu

129 ms

coronavirus.duke.edu

coronavirus.duke.edu

118 ms

js

js

100 ms

style.min.css

style.min.css

77 ms

duke-alertbar-public.css

duke-alertbar-public.css

75 ms

alert.css

alert.css

217 ms

fonts.css

fonts.css

75 ms

genericons.min.css

genericons.min.css

80 ms

style.css

style.css

84 ms

style.css

style.css

80 ms

style.css

style.css

180 ms

frontend-gtag.min.js

frontend-gtag.min.js

183 ms

jquery.min.js

jquery.min.js

203 ms

jquery-migrate.min.js

jquery-migrate.min.js

183 ms

duke-alertbar-public.js

duke-alertbar-public.js

183 ms

doubletaptogo.min.js

doubletaptogo.min.js

189 ms

duke.css

duke.css

218 ms

alert.html

alert.html

212 ms

global.js

global.js

333 ms

new-tab.js

new-tab.js

333 ms

accessibility.js

accessibility.js

332 ms

css

css

34 ms

css

css

46 ms

css

css

23 ms

cropped-046818_few_003-2.jpg

cropped-046818_few_003-2.jpg

124 ms

20200908_1styrdesigneng014.jpg

20200908_1styrdesigneng014.jpg

87 ms

20210217_covidtestpath006.jpg

20210217_covidtestpath006.jpg

88 ms

20210601_gardensopen001b.jpg

20210601_gardensopen001b.jpg

88 ms

20200820_masksstudysd041.jpg

20200820_masksstudysd041.jpg

89 ms

duke_wordmark-white.svg

duke_wordmark-white.svg

102 ms

20200908_1styrdesigneng014.jpg

20200908_1styrdesigneng014.jpg

170 ms

20210217_covidtestpath006.jpg

20210217_covidtestpath006.jpg

198 ms

20210601_gardensopen001b.jpg

20210601_gardensopen001b.jpg

219 ms

20200820_masksstudysd041.jpg

20200820_masksstudysd041.jpg

225 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1x4gaVc.ttf

26 ms

font

font

60 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsg-1x4gaVc.ttf

41 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0B4gaVc.ttf

47 ms

duke-icons.ttf

duke-icons.ttf

105 ms

Accessibility Review

coronavirus.duke.edu accessibility score

91

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

Form elements do not have associated labels

Best Practices

coronavirus.duke.edu best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

coronavirus.duke.edu SEO score

100

Search Engine Optimization Advices

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 Coronavirus.duke.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 Coronavirus.duke.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

coronavirus.duke.edu

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