Report Summary

  • 78

    Performance

    Renders faster than
    85% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

vis.csail.mit.edu

MIT Visualization Group | We use visualization as a petri dish to study intelligence augmentation: how can computation help amplify our cognition and ...

Page Load Speed

1.5 sec in total

First Response

61 ms

Resources Loaded

547 ms

Page Rendered

925 ms

vis.csail.mit.edu screenshot

About Website

Click here to check amazing Vis Csail MIT content for United States. Otherwise, check out these important facts you probably never knew about vis.csail.mit.edu

We use visualization as a petri dish to study intelligence augmentation: how can computation help amplify our cognition and creativity, while respecting our agency?

Visit vis.csail.mit.edu

Key Findings

We analyzed Vis.csail.mit.edu page load time and found that the first response time was 61 ms and then it took 1.5 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

vis.csail.mit.edu performance score

78

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

78/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

72/100

25%

SI (Speed Index)

Value3.3 s

91/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.291

41/100

15%

TTI (Time to Interactive)

Value5.2 s

75/100

10%

Network Requests Diagram

vis.csail.mit.edu

61 ms

vis.csail.mit.edu

90 ms

js

95 ms

css2

37 ms

styles2.1.css

21 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 77% of them (48 requests) were addressed to the original Vis.csail.mit.edu, 13% (8 requests) were made to Fonts.gstatic.com and 3% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (289 ms) belongs to the original domain Vis.csail.mit.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 46.4 kB (1%)

Content Size

6.0 MB

After Optimization

6.0 MB

In fact, the total size of Vis.csail.mit.edu main page is 6.0 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. Only a small number of websites need less resources to load. Images take 5.9 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 29.3 kB

  • Original 36.1 kB
  • After minification 27.3 kB
  • After compression 6.8 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 8.8 kB, which is 24% 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 29.3 kB or 81% of the original size.

Image Optimization

-0%

Potential reduce by 17.0 kB

  • Original 5.9 MB
  • After minification 5.9 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. Vis Csail MIT images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 56 B

  • Original 25.3 kB
  • After minification 25.3 kB
  • After compression 25.3 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 81 B

  • Original 7.3 kB
  • After minification 7.3 kB
  • After compression 7.2 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. Vis.csail.mit.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 3 (6%)

Requests Now

52

After Optimization

49

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vis Csail MIT. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

vis.csail.mit.edu accessibility score

98

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.

Best Practices

vis.csail.mit.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

SEO Factors

vis.csail.mit.edu SEO score

92

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

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 Vis.csail.mit.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 Vis.csail.mit.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 Vis Csail MIT. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: