Tools & Wizards About Us
pkynzskf.labs.coursera.org screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

pkynzskf.labs.coursera.org

Coursera | Online Courses From Top Universities. Join for Free

Page Load Speed

440 ms in total

First Response

11 ms

Resources Loaded

372 ms

Page Rendered

57 ms

pkynzskf.labs.coursera.org screenshot

About Website

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Key Findings

We analyzed Pkynzskf.labs.coursera.org page load time and found that the first response time was 11 ms and then it took 429 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

pkynzskf.labs.coursera.org performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value9.9 s

0/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value5,930 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value20.5 s

2/100

10%

Network Requests Diagram

pkynzskf.labs.coursera.org

11 ms

pkynzskf

88 ms

allStyles.6ce2bba717916df1c8ac.css

88 ms

allStyles.6ce2bba717916df1c8ac.js

112 ms

en.app.f75cade30fa793f43a1b.js

243 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that 14% of them (1 request) were addressed to the original Pkynzskf.labs.coursera.org, 43% (3 requests) were made to D3njjcbhbojbot.cloudfront.net and 14% (1 request) were made to Coursera.org. The less responsive or slowest element that took the longest time to load (243 ms) relates to the external source D3njjcbhbojbot.cloudfront.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 69.5 kB (10%)

Content Size

717.0 kB

After Optimization

647.5 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Pkynzskf.labs.coursera.org main page is 717.0 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 5% of websites need less resources to load. Javascripts take 602.9 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 66.2 kB

  • Original 91.7 kB
  • After minification 91.7 kB
  • After compression 25.6 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 66.2 kB or 72% of the original size.

JavaScript Optimization

-1%

Potential reduce by 3.2 kB

  • Original 602.9 kB
  • After minification 602.8 kB
  • After compression 599.7 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

-1%

Potential reduce by 176 B

  • Original 22.4 kB
  • After minification 22.4 kB
  • After compression 22.2 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. Pkynzskf.labs.coursera.org has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • AJAX
  • JavaScript
  • CSS

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pkynzskf Labs Coursera. According to our analytics all requests are already optimized.

Network Requests Diagram

pkynzskf.labs.coursera.org

pkynzskf.labs.coursera.org

11 ms

pkynzskf

pkynzskf

88 ms

allStyles.6ce2bba717916df1c8ac.css

allStyles.6ce2bba717916df1c8ac.css

88 ms

allStyles.6ce2bba717916df1c8ac.js

allStyles.6ce2bba717916df1c8ac.js

112 ms

en.app.f75cade30fa793f43a1b.js

en.app.f75cade30fa793f43a1b.js

243 ms

bundle.tracing.es5.min.js

bundle.tracing.es5.min.js

35 ms

39 ms

Accessibility Review

pkynzskf.labs.coursera.org accessibility score

100

Accessibility Issues

Best Practices

pkynzskf.labs.coursera.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

pkynzskf.labs.coursera.org SEO score

93

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

Links do not have descriptive text

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Pkynzskf.labs.coursera.org 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 Pkynzskf.labs.coursera.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

pkynzskf.labs.coursera.org

Open Graph data is detected on the main page of Pkynzskf Labs Coursera. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: