Tools & Wizards About Us
acee.princeton.edu screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    67% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

acee.princeton.edu

Home Page - Andlinger Center for Energy and the Environment

Page Load Speed

1.3 sec in total

First Response

403 ms

Resources Loaded

754 ms

Page Rendered

159 ms

acee.princeton.edu screenshot

About Website

Visit acee.princeton.edu now to see the best up-to-date Acee Princeton content for United States and also check out these interesting facts you probably never knew about acee.princeton.edu

The Andlinger Center for Energy and the Environment at Princeton University is a multidisciplinary research and education center, whose singular mission is to develop technologies and solutions to sec...

Visit acee.princeton.edu

Key Findings

We analyzed Acee.princeton.edu page load time and found that the first response time was 403 ms and then it took 913 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

acee.princeton.edu performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value9.6 s

0/100

25%

SI (Speed Index)

Value8.4 s

18/100

10%

TBT (Total Blocking Time)

Value170 ms

93/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value19.2 s

2/100

10%

Network Requests Diagram

acee.princeton.edu

403 ms

style.css

56 ms

jquery-ui.css

25 ms

jquery.js

71 ms

jquery.cycle.all.js

63 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 85% of them (40 requests) were addressed to the original Acee.princeton.edu, 9% (4 requests) were made to Google-analytics.com and 2% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (403 ms) belongs to the original domain Acee.princeton.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 542.6 kB (36%)

Content Size

1.5 MB

After Optimization

953.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Acee.princeton.edu main page is 1.5 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. 50% of websites need less resources to load. Images take 844.6 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 15.1 kB

  • Original 20.2 kB
  • After minification 18.2 kB
  • After compression 5.1 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 15.1 kB or 75% of the original size.

Image Optimization

-9%

Potential reduce by 80.1 kB

  • Original 844.6 kB
  • After minification 764.5 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. Acee Princeton images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 328.9 kB

  • Original 488.0 kB
  • After minification 463.9 kB
  • After compression 159.1 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 328.9 kB or 67% of the original size.

CSS Optimization

-83%

Potential reduce by 118.5 kB

  • Original 143.5 kB
  • After minification 123.1 kB
  • After compression 25.0 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. Acee.princeton.edu needs all CSS files to be minified and compressed as it can save up to 118.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (70%)

Requests Now

46

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Acee Princeton. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

acee.princeton.edu

acee.princeton.edu

403 ms

style.css

style.css

56 ms

jquery-ui.css

jquery-ui.css

25 ms

jquery.js

jquery.js

71 ms

jquery.cycle.all.js

jquery.cycle.all.js

63 ms

flowplayer-3.2.6.min.js

flowplayer-3.2.6.min.js

44 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

51 ms

main.js

main.js

68 ms

tfs3pdh.js

tfs3pdh.js

187 ms

styles.css

styles.css

82 ms

style.css

style.css

81 ms

font-awesome.min.css

font-awesome.min.css

93 ms

style.css

style.css

81 ms

style.css

style.css

93 ms

themify.framework.css

themify.framework.css

91 ms

ptb-public.css

ptb-public.css

95 ms

lightbox.css

lightbox.css

98 ms

jquery.js

jquery.js

153 ms

jquery-migrate.min.js

jquery-migrate.min.js

110 ms

jquery.isotope.min.js

jquery.isotope.min.js

138 ms

frontend-scripts.js

frontend-scripts.js

110 ms

lightbox.js

lightbox.js

131 ms

ptb-public.js

ptb-public.js

114 ms

jquery.form.min.js

jquery.form.min.js

79 ms

scripts.js

scripts.js

72 ms

scripts.js

scripts.js

78 ms

scripts.js

scripts.js

90 ms

wp-embed.min.js

wp-embed.min.js

95 ms

print.css

print.css

12 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

114 ms

font-lightcase.css

font-lightcase.css

19 ms

lightcase-max-640.css

lightcase-max-640.css

20 ms

lightcase-min-641.css

lightcase-min-641.css

21 ms

analytics.js

analytics.js

60 ms

main-logo.png

main-logo.png

52 ms

search.png

search.png

50 ms

pu-header-logo.png

pu-header-logo.png

50 ms

marquee01.jpg

marquee01.jpg

151 ms

marquee02.jpg

marquee02.jpg

150 ms

marquee06.jpg

marquee06.jpg

148 ms

princeton-logo-faded.png

princeton-logo-faded.png

51 ms

engineering-logo-faded.png

engineering-logo-faded.png

147 ms

ga.js

ga.js

34 ms

main-logo-2.png

main-logo-2.png

131 ms

ajax-loader.gif

ajax-loader.gif

102 ms

collect

collect

17 ms

__utm.gif

__utm.gif

10 ms

Accessibility Review

acee.princeton.edu accessibility score

80

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

Links do not have a discernible name

Best Practices

acee.princeton.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

acee.princeton.edu SEO score

86

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

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 Acee.princeton.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 Acee.princeton.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

acee.princeton.edu

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