Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

isri.cs.cmu.edu

Software and Societal Systems Department - Software and Societal Systems - School of Computer Science - Carnegie Mellon University

Page Load Speed

2.9 sec in total

First Response

204 ms

Resources Loaded

2.1 sec

Page Rendered

527 ms

isri.cs.cmu.edu screenshot

About Website

Click here to check amazing Isri Cs Cmu content for United States. Otherwise, check out these important facts you probably never knew about isri.cs.cmu.edu

The Software and Societal Systems Department at Carnegie Mellon seeks to understand how computational technologies may better serve societies, communities, and the world.

Visit isri.cs.cmu.edu

Key Findings

We analyzed Isri.cs.cmu.edu page load time and found that the first response time was 204 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

isri.cs.cmu.edu performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

47/100

10%

LCP (Largest Contentful Paint)

Value6.7 s

8/100

25%

SI (Speed Index)

Value9.0 s

14/100

10%

TBT (Total Blocking Time)

Value3,660 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value17.6 s

4/100

10%

Network Requests Diagram

isri.cs.cmu.edu

204 ms

s3d.cmu.edu

224 ms

css

50 ms

main.6.7.min.css

370 ms

widgets.js

205 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Isri.cs.cmu.edu, 24% (11 requests) were made to Cmu.edu and 24% (11 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (820 ms) relates to the external source S3d.cmu.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 639.0 kB (10%)

Content Size

6.5 MB

After Optimization

5.8 MB

In fact, the total size of Isri.cs.cmu.edu main page is 6.5 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. 55% of websites need less resources to load. Images take 6.2 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 53.8 kB

  • Original 60.3 kB
  • After minification 21.2 kB
  • After compression 6.5 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 39.1 kB, which is 65% 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 53.8 kB or 89% of the original size.

Image Optimization

-7%

Potential reduce by 442.9 kB

  • Original 6.2 MB
  • After minification 5.7 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. Isri Cs Cmu images are well optimized though.

JavaScript Optimization

-53%

Potential reduce by 61.5 kB

  • Original 116.4 kB
  • After minification 116.4 kB
  • After compression 54.8 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 61.5 kB or 53% of the original size.

CSS Optimization

-83%

Potential reduce by 80.8 kB

  • Original 96.8 kB
  • After minification 69.9 kB
  • After compression 16.0 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. Isri.cs.cmu.edu needs all CSS files to be minified and compressed as it can save up to 80.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (46%)

Requests Now

39

After Optimization

21

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Isri Cs Cmu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

isri.cs.cmu.edu accessibility score

98

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

Best Practices

isri.cs.cmu.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

isri.cs.cmu.edu SEO score

83

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 Isri.cs.cmu.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 Isri.cs.cmu.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

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