Tools & Wizards About Us

Report Summary

  • 84

    Performance

    Renders faster than
    88% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

robogrok.com

RoboGrok University-Level Robotics Course and Parts Kit

Page Load Speed

1.2 sec in total

First Response

131 ms

Resources Loaded

945 ms

Page Rendered

129 ms

About Website

Click here to check amazing Robo Grok content for United States. Otherwise, check out these important facts you probably never knew about robogrok.com

RoboGrok is a complete hands-on university-level robotics course covering forward and inverse kinematics (Denavit-Hartenberg), sensors, computer vision (machine vision), Artificial Intelligence, and m...

Visit robogrok.com

Key Findings

We analyzed Robogrok.com page load time and found that the first response time was 131 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

robogrok.com performance score

84

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.7 s

93/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

52/100

25%

SI (Speed Index)

Value1.7 s

100/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

Network Requests Diagram

robogrok.com

131 ms

robogrok.com

234 ms

RoboGrok_Website_WB12_Organized.css

61 ms

index.css

116 ms

analytics.js

14 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 88% of them (21 requests) were addressed to the original Robogrok.com, 8% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (455 ms) belongs to the original domain Robogrok.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 248.3 kB (58%)

Content Size

427.9 kB

After Optimization

179.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Robogrok.com main page is 427.9 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 385.8 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 15.3 kB

  • Original 20.0 kB
  • After minification 20.0 kB
  • After compression 4.7 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 15.3 kB or 77% of the original size.

Image Optimization

-60%

Potential reduce by 232.9 kB

  • Original 385.8 kB
  • After minification 152.9 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. Obviously, Robo Grok needs image optimization as it can save up to 232.9 kB or 60% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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

-12%

Potential reduce by 137 B

  • Original 1.2 kB
  • After minification 1.2 kB
  • After compression 1.1 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. Robogrok.com needs all CSS files to be minified and compressed as it can save up to 137 B or 12% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

22

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Robo Grok. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

robogrok.com accessibility score

78

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.

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

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best Practices

robogrok.com 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

SEO Factors

robogrok.com SEO score

75

Search Engine Optimization Advices

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 Robogrok.com 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 Robogrok.com 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 Robo Grok. 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: