Tools & Wizards About Us
robohub.org screenshot

Report Summary

  • 59

    Performance

    Renders faster than
    74% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

robohub.org

Robohub - Connecting the robotics community to the world

Page Load Speed

3.6 sec in total

First Response

545 ms

Resources Loaded

2.4 sec

Page Rendered

650 ms

robohub.org screenshot

About Website

Visit robohub.org now to see the best up-to-date Robohub content for United States and also check out these interesting facts you probably never knew about robohub.org

Visit robohub.org

Key Findings

We analyzed Robohub.org page load time and found that the first response time was 545 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

robohub.org performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value9.1 s

1/100

25%

SI (Speed Index)

Value4.1 s

80/100

10%

TBT (Total Blocking Time)

Value230 ms

86/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value6.2 s

62/100

10%

Network Requests Diagram

robohub.org

545 ms

robohub.org

402 ms

omnilib.css

101 ms

parametric.css

202 ms

design.css

287 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 82% of them (31 requests) were addressed to the original Robohub.org, 5% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (795 ms) belongs to the original domain Robohub.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 566.9 kB (18%)

Content Size

3.2 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Robohub.org main page is 3.2 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. 35% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 50.7 kB

  • Original 60.8 kB
  • After minification 50.3 kB
  • After compression 10.1 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 10.5 kB, which is 17% 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 50.7 kB or 83% of the original size.

Image Optimization

-8%

Potential reduce by 231.0 kB

  • Original 2.7 MB
  • After minification 2.5 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. Robohub images are well optimized though.

JavaScript Optimization

-57%

Potential reduce by 136.2 kB

  • Original 240.6 kB
  • After minification 240.5 kB
  • After compression 104.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 136.2 kB or 57% of the original size.

CSS Optimization

-87%

Potential reduce by 149.0 kB

  • Original 170.3 kB
  • After minification 153.9 kB
  • After compression 21.4 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. Robohub.org needs all CSS files to be minified and compressed as it can save up to 149.0 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (47%)

Requests Now

36

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Robohub. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

robohub.org

robohub.org

545 ms

robohub.org

robohub.org

402 ms

omnilib.css

omnilib.css

101 ms

parametric.css

parametric.css

202 ms

design.css

design.css

287 ms

quicklatex-format.css

quicklatex-format.css

300 ms

style.min.css

style.min.css

572 ms

blocks.style.build.css

blocks.style.build.css

387 ms

jquery.min.js

jquery.min.js

478 ms

jquery-migrate.min.js

jquery-migrate.min.js

298 ms

wpp.min.js

wpp.min.js

386 ms

wp-quicklatex-frontend.js

wp-quicklatex-frontend.js

397 ms

jquery.min.js

jquery.min.js

36 ms

css2

css2

49 ms

slim-081711.css

slim-081711.css

40 ms

core.min.js

core.min.js

488 ms

mouse.min.js

mouse.min.js

483 ms

sortable.min.js

sortable.min.js

482 ms

mpp-frontend.js

mpp-frontend.js

494 ms

analytics.js

analytics.js

68 ms

tlogo_r.png

tlogo_r.png

153 ms

tlogo2_r.png

tlogo2_r.png

154 ms

shadow.png

shadow.png

151 ms

robot_talk_16x9-1024x576.png

robot_talk_16x9-1024x576.png

423 ms

shadowx.png

shadowx.png

153 ms

ICRA2024-logo-1024x383.png

ICRA2024-logo-1024x383.png

420 ms

Suction-cup-credit-Tianqi-Yue.jpeg

Suction-cup-credit-Tianqi-Yue.jpeg

232 ms

Screenshot-2024-03-18-at-23.01.54-1024x328.png

Screenshot-2024-03-18-at-23.01.54-1024x328.png

517 ms

bigstock-155728943.jpg

bigstock-155728943.jpg

430 ms

Screenshot-2023-12-31-at-08.31.30-1024x679.png

Screenshot-2023-12-31-at-08.31.30-1024x679.png

795 ms

drone_in_rotation-1024x776.jpg

drone_in_rotation-1024x776.jpg

518 ms

robotic_vision.png

robotic_vision.png

519 ms

nccr.png

nccr.png

525 ms

scicomm.png

scicomm.png

530 ms

vftag_a.png

vftag_a.png

619 ms

font

font

46 ms

collect

collect

16 ms

js

js

51 ms

Accessibility Review

robohub.org accessibility score

70

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

Form elements do not have associated labels

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

robohub.org 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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

robohub.org SEO score

91

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

High

Tap targets are not sized appropriately

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 Robohub.org 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 Robohub.org 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

robohub.org

Open Graph description is not detected on the main page of Robohub. 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: