Tools & Wizards About Us

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

robots.engin.umich.edu

PeRL: The Perceptual Robotics Laboratory at the University of Michigan | Home

Page Load Speed

1.1 sec in total

First Response

76 ms

Resources Loaded

391 ms

Page Rendered

665 ms

About Website

Visit robots.engin.umich.edu now to see the best up-to-date Robots Engin Umich content for United States and also check out these interesting facts you probably never knew about robots.engin.umich.edu

PeRL: Robotics laboratory at the University of Michigan, studying problems related to autonomous navigation and mapping for mobile robots in a priori unknown environments.

Visit robots.engin.umich.edu

Key Findings

We analyzed Robots.engin.umich.edu page load time and found that the first response time was 76 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

robots.engin.umich.edu performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

83/100

10%

LCP (Largest Contentful Paint)

Value14.7 s

0/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.35

31/100

15%

TTI (Time to Interactive)

Value2.0 s

99/100

10%

Network Requests Diagram

robots.engin.umich.edu

76 ms

robots.engin.umich.edu

122 ms

screen.css

12 ms

slideshow.css

22 ms

mootools.js

46 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that all of those requests were addressed to Robots.engin.umich.edu and no external sources were called. The less responsive or slowest element that took the longest time to load (122 ms) belongs to the original domain Robots.engin.umich.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 305.0 kB (16%)

Content Size

1.9 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Robots.engin.umich.edu main page is 1.9 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. 40% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 11.2 kB

  • Original 14.4 kB
  • After minification 13.9 kB
  • After compression 3.2 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 11.2 kB or 78% of the original size.

Image Optimization

-15%

Potential reduce by 290.6 kB

  • Original 1.9 MB
  • After minification 1.6 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. Obviously, Robots Engin Umich needs image optimization as it can save up to 290.6 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-10%

Potential reduce by 2.4 kB

  • Original 22.9 kB
  • After minification 22.9 kB
  • After compression 20.5 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

-22%

Potential reduce by 894 B

  • Original 4.0 kB
  • After minification 4.0 kB
  • After compression 3.1 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. Robots.engin.umich.edu needs all CSS files to be minified and compressed as it can save up to 894 B or 22% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

31

After Optimization

31

  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Robots Engin Umich. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

robots.engin.umich.edu accessibility score

93

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

robots.engin.umich.edu best practices score

75

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

SEO Factors

robots.engin.umich.edu SEO score

69

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

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 Robots.engin.umich.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 Robots.engin.umich.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 description is not detected on the main page of Robots Engin Umich. 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: