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cohenlab.stanford.edu screenshot

Report Summary

  • 71

    Performance

    Renders faster than
    81% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

cohenlab.stanford.edu

Cohen Lab Mission | Cohen LabCohen Lab | Intervening Wisely Since 1999

Page Load Speed

3.8 sec in total

First Response

1.3 sec

Resources Loaded

2.4 sec

Page Rendered

111 ms

cohenlab.stanford.edu screenshot

About Website

Visit cohenlab.stanford.edu now to see the best up-to-date Cohen Lab Stanford content for United States and also check out these interesting facts you probably never knew about cohenlab.stanford.edu

Our lab investigates how, when, and why people change. We use multiple methods, with a strong interest in field experimentation on social problems. We follow the traditions pioneered by Kurt Lewin and...

Visit cohenlab.stanford.edu

Key Findings

We analyzed Cohenlab.stanford.edu page load time and found that the first response time was 1.3 sec and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

cohenlab.stanford.edu performance score

71

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value16.8 s

0/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.045

99/100

15%

TTI (Time to Interactive)

Value3.8 s

89/100

10%

Network Requests Diagram

cohenlab.stanford.edu

1339 ms

bootstrap.min.css

457 ms

font-awesome.min.css

27 ms

base.min.css

211 ms

style.css

138 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that 55% of them (12 requests) were addressed to the original Cohenlab.stanford.edu, 23% (5 requests) were made to Fonts.gstatic.com and 9% (2 requests) were made to Maxcdn.bootstrapcdn.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Cohenlab.stanford.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 298.6 kB (27%)

Content Size

1.1 MB

After Optimization

809.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cohenlab.stanford.edu main page is 1.1 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. 30% of websites need less resources to load. Images take 774.2 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 13.3 kB

  • Original 17.8 kB
  • After minification 15.7 kB
  • After compression 4.4 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. This page needs HTML code to be minified as it can gain 2.1 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 13.3 kB or 75% of the original size.

Image Optimization

-7%

Potential reduce by 54.3 kB

  • Original 774.2 kB
  • After minification 720.0 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. Cohen Lab Stanford images are well optimized though.

JavaScript Optimization

-46%

Potential reduce by 41.8 kB

  • Original 91.2 kB
  • After minification 90.0 kB
  • After compression 49.3 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 41.8 kB or 46% of the original size.

CSS Optimization

-84%

Potential reduce by 189.2 kB

  • Original 225.0 kB
  • After minification 222.1 kB
  • After compression 35.8 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. Cohenlab.stanford.edu needs all CSS files to be minified and compressed as it can save up to 189.2 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (67%)

Requests Now

15

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 15 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cohen Lab Stanford. 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 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

cohenlab.stanford.edu

cohenlab.stanford.edu

1339 ms

bootstrap.min.css

bootstrap.min.css

457 ms

font-awesome.min.css

font-awesome.min.css

27 ms

base.min.css

base.min.css

211 ms

style.css

style.css

138 ms

jquery.min.js

jquery.min.js

7 ms

bootstrap.min.js

bootstrap.min.js

278 ms

base.js

base.js

152 ms

custom.js

custom.js

158 ms

style.min.css

style.min.css

369 ms

wp-embed.min.js

wp-embed.min.js

155 ms

css

css

33 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

77 ms

brandbar-stanford-logo@2x.png

brandbar-stanford-logo@2x.png

82 ms

lab_h-1024x523.png

lab_h-1024x523.png

627 ms

footer-stanford-logo@2x.png

footer-stanford-logo@2x.png

78 ms

6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff

6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7j.woff

15 ms

6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff

6xKydSBYKcSV-LCoeQqfX1RYOo3ik4zwlxdo.woff

22 ms

6xKydSBYKcSV-LCoeQqfX1RYOo3i94_wlxdo.woff

6xKydSBYKcSV-LCoeQqfX1RYOo3i94_wlxdo.woff

29 ms

6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdo.woff

6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdo.woff

29 ms

6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff

6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdo.woff

29 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

40 ms

Accessibility Review

cohenlab.stanford.edu accessibility score

100

Accessibility Issues

Best Practices

cohenlab.stanford.edu 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

cohenlab.stanford.edu SEO score

98

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

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 Cohenlab.stanford.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 Cohenlab.stanford.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

cohenlab.stanford.edu

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