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concurrencykit.org screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

concurrencykit.org

Concurrency Kit

Page Load Speed

199 ms in total

First Response

30 ms

Resources Loaded

77 ms

Page Rendered

92 ms

concurrencykit.org screenshot

About Website

Click here to check amazing Concurrency Kit content for United States. Otherwise, check out these important facts you probably never knew about concurrencykit.org

Visit concurrencykit.org

Key Findings

We analyzed Concurrencykit.org page load time and found that the first response time was 30 ms and then it took 169 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

concurrencykit.org performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.9 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.0 s

100/100

25%

SI (Speed Index)

Value0.9 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.9 s

100/100

10%

Network Requests Diagram

concurrencykit.org

30 ms

bootstrap.min.css

11 ms

appnexus.jpg

19 ms

circonus.png

19 ms

fastly.png

20 ms

Our browser made a total of 9 requests to load all elements on the main page. We found that all of those requests were addressed to Concurrencykit.org and no external sources were called. The less responsive or slowest element that took the longest time to load (31 ms) belongs to the original domain Concurrencykit.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.0 kB (55%)

Content Size

112.5 kB

After Optimization

50.5 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Concurrencykit.org main page is 112.5 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. 15% of websites need less resources to load. CSS take 67.2 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 2.3 kB

  • Original 3.5 kB
  • After minification 3.1 kB
  • After compression 1.1 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 364 B, which is 11% 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 2.3 kB or 67% of the original size.

Image Optimization

-10%

Potential reduce by 4.2 kB

  • Original 41.9 kB
  • After minification 37.6 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. Concurrency Kit images are well optimized though.

CSS Optimization

-83%

Potential reduce by 55.5 kB

  • Original 67.2 kB
  • After minification 67.2 kB
  • After compression 11.7 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. Concurrencykit.org needs all CSS files to be minified and compressed as it can save up to 55.5 kB or 83% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

8

After Optimization

8

  • Images
  • CSS

The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Concurrency Kit. According to our analytics all requests are already optimized.

Network Requests Diagram

concurrencykit.org

concurrencykit.org

30 ms

bootstrap.min.css

bootstrap.min.css

11 ms

appnexus.jpg

appnexus.jpg

19 ms

circonus.png

circonus.png

19 ms

fastly.png

fastly.png

20 ms

msys.png

msys.png

19 ms

omniti.gif

omniti.gif

20 ms

telemetry.gif

telemetry.gif

24 ms

btm.png

btm.png

31 ms

Accessibility Review

concurrencykit.org accessibility score

55

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

concurrencykit.org 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

SEO Factors

concurrencykit.org SEO score

83

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Concurrencykit.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 Concurrencykit.org main page’s claimed encoding is . 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

concurrencykit.org

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