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openrtos.org screenshot

Report Summary

  • 75

    Performance

    Renders faster than
    83% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

openrtos.org

FreeRTOS - Market leading RTOS (Real Time Operating System) for embedded systems with Internet of Things extensions

Page Load Speed

2.4 sec in total

First Response

306 ms

Resources Loaded

1.8 sec

Page Rendered

229 ms

openrtos.org screenshot

About Website

Welcome to openrtos.org homepage info - get ready to check Open RTOS best content right away, or after learning these important things about openrtos.org

RTOS - FreeRTOS is a truly free professional grade RTOS for microcontrollers that supports 35 MCU architectures and become a market leader. A Portable, open source, mini Real Time kernel. A free RTOS ...

Visit openrtos.org

Key Findings

We analyzed Openrtos.org page load time and found that the first response time was 306 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

openrtos.org performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

51/100

25%

SI (Speed Index)

Value4.4 s

73/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.1 s

76/100

10%

Network Requests Diagram

openrtos.org

306 ms

www.openrtos.org

413 ms

doxygen.css

163 ms

stlib.js

166 ms

left_menu.js

170 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 79% of them (31 requests) were addressed to the original Openrtos.org, 8% (3 requests) were made to Code.jquery.com and 5% (2 requests) were made to Cdn-images.mailchimp.com. The less responsive or slowest element that took the longest time to load (735 ms) belongs to the original domain Openrtos.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 103.3 kB (36%)

Content Size

286.8 kB

After Optimization

183.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Openrtos.org main page is 286.8 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. 30% of websites need less resources to load. Images take 117.0 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 83.9 kB

  • Original 101.3 kB
  • After minification 82.0 kB
  • After compression 17.4 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 19.3 kB, which is 19% 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 83.9 kB or 83% of the original size.

Image Optimization

-14%

Potential reduce by 16.9 kB

  • Original 117.0 kB
  • After minification 100.1 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, Open RTOS needs image optimization as it can save up to 16.9 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 1.0 kB

  • Original 59.4 kB
  • After minification 59.4 kB
  • After compression 58.4 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

-16%

Potential reduce by 1.4 kB

  • Original 9.1 kB
  • After minification 9.1 kB
  • After compression 7.6 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. Openrtos.org needs all CSS files to be minified and compressed as it can save up to 1.4 kB or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (44%)

Requests Now

36

After Optimization

20

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open RTOS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

openrtos.org

openrtos.org

306 ms

www.openrtos.org

www.openrtos.org

413 ms

doxygen.css

doxygen.css

163 ms

stlib.js

stlib.js

166 ms

left_menu.js

left_menu.js

170 ms

jquery-latest.js

jquery-latest.js

37 ms

jquery-ui.js

jquery-ui.js

42 ms

jquery-ui.css

jquery-ui.css

17 ms

liquid-canvas.js

liquid-canvas.js

170 ms

liquid-canvas-plugins.js

liquid-canvas-plugins.js

171 ms

slim-10_7.css

slim-10_7.css

10 ms

counter.js

counter.js

31 ms

slim-10_7.css

slim-10_7.css

19 ms

sttree.js

sttree.js

170 ms

steffie.js

steffie.js

165 ms

ga.js

ga.js

64 ms

aws-logo.png

aws-logo.png

162 ms

logo.jpg

logo.jpg

242 ms

Twitter_Follow.png

Twitter_Follow.png

164 ms

mailinglist.png

mailinglist.png

244 ms

blank.gif

blank.gif

161 ms

expand_f.gif

expand_f.gif

164 ms

expand_uf.gif

expand_uf.gif

258 ms

line_def0.gif

line_def0.gif

267 ms

line_def1.gif

line_def1.gif

324 ms

line_def2.gif

line_def2.gif

326 ms

line_def3.gif

line_def3.gif

340 ms

menu_hint_arrow.png

menu_hint_arrow.png

341 ms

ARM-connected.png

ARM-connected.png

500 ms

Espressif_logo.png

Espressif_logo.png

426 ms

IAR.jpg

IAR.jpg

483 ms

Microchip-Premier-Third-Party-Partner.jpg

Microchip-Premier-Third-Party-Partner.jpg

562 ms

Partner-of-NXP.jpg

Partner-of-NXP.jpg

498 ms

Renesas.png

Renesas.png

499 ms

STmicro-logo.jpg

STmicro-logo.jpg

586 ms

Texas-Instruments-MCU-Developer-Network.jpg

Texas-Instruments-MCU-Developer-Network.jpg

641 ms

wittenstein.jpg

wittenstein.jpg

658 ms

Xilinx.jpg

Xilinx.jpg

735 ms

t.php

t.php

75 ms

Accessibility Review

openrtos.org accessibility score

74

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

openrtos.org best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

openrtos.org SEO score

81

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Openrtos.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 Openrtos.org main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

openrtos.org

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