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lean.mit.edu screenshot

Report Summary

  • 77

    Performance

    Renders faster than
    85% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

lean.mit.edu

Low-Energy Autonomy and Navigation (LEAN) Research Group

Page Load Speed

851 ms in total

First Response

100 ms

Resources Loaded

605 ms

Page Rendered

146 ms

lean.mit.edu screenshot

About Website

Click here to check amazing LEAN Mit content for United States. Otherwise, check out these important facts you probably never knew about lean.mit.edu

The Low-Energy Autonomy and Navigation (LEAN) is an interdisciplinary research group at the Massachusetts Institute of Technology (MIT), focusing on the co-design the algorithms and hardware for next-...

Visit lean.mit.edu

Key Findings

We analyzed Lean.mit.edu page load time and found that the first response time was 100 ms and then it took 751 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

lean.mit.edu performance score

77

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

88/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

76/100

25%

SI (Speed Index)

Value1.8 s

100/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.542

13/100

15%

TTI (Time to Interactive)

Value4.5 s

83/100

10%

Network Requests Diagram

lean.mit.edu

100 ms

lean.mit.edu

239 ms

lean.webflow.902cd2286.css

94 ms

js

74 ms

jquery-3.5.1.min.dc5e7f18c8.js

35 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 25% of them (2 requests) were addressed to the original Lean.mit.edu, 50% (4 requests) were made to Assets-global.website-files.com and 13% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (239 ms) belongs to the original domain Lean.mit.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 13.6 kB (6%)

Content Size

239.4 kB

After Optimization

225.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Lean.mit.edu main page is 239.4 kB. 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 10% of websites need less resources to load. Images take 114.0 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 12.6 kB

  • Original 16.1 kB
  • After minification 16.0 kB
  • After compression 3.5 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. 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 12.6 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 525 B

  • Original 114.0 kB
  • After minification 113.5 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. LEAN Mit images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 99.8 kB
  • After minification 99.8 kB
  • After compression 99.8 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. This website has mostly compressed JavaScripts.

CSS Optimization

-5%

Potential reduce by 479 B

  • Original 9.6 kB
  • After minification 9.6 kB
  • After compression 9.1 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. Lean.mit.edu has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

  • Images
  • JavaScript
  • CSS

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of LEAN Mit. According to our analytics all requests are already optimized.

Network Requests Diagram

lean.mit.edu

lean.mit.edu

100 ms

lean.mit.edu

lean.mit.edu

239 ms

lean.webflow.902cd2286.css

lean.webflow.902cd2286.css

94 ms

js

js

74 ms

jquery-3.5.1.min.dc5e7f18c8.js

jquery-3.5.1.min.dc5e7f18c8.js

35 ms

webflow.46784a81b.js

webflow.46784a81b.js

155 ms

5e9201a806600fc8d8d22457_Artboard%201.png

5e9201a806600fc8d8d22457_Artboard%201.png

108 ms

5e920bf37859bce7b46a26fe_sertac-vivienne.jpg

5e920bf37859bce7b46a26fe_sertac-vivienne.jpg

125 ms

Accessibility Review

lean.mit.edu accessibility score

98

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

lean.mit.edu best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

lean.mit.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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lean.mit.edu can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Lean.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

lean.mit.edu

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