Tools & Wizards About Us
rjekker.nl screenshot

Report Summary

  • 77

    Performance

    Renders faster than
    85% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 95

    SEO

    Google-friendlier than
    91% of websites

rjekker.nl

Code Sensei

Page Load Speed

2.6 sec in total

First Response

400 ms

Resources Loaded

2 sec

Page Rendered

235 ms

rjekker.nl screenshot

About Website

Click here to check amazing Rjekker content. Otherwise, check out these important facts you probably never knew about rjekker.nl

Code Sensei: premium developer education. Python, Linux, Open Source.

Visit rjekker.nl

Key Findings

We analyzed Rjekker.nl page load time and found that the first response time was 400 ms and then it took 2.2 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

rjekker.nl performance score

77

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

64/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value3.7 s

86/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.023

100/100

15%

TTI (Time to Interactive)

Value6.5 s

58/100

10%

Network Requests Diagram

rjekker.nl

400 ms

www.rjekker.nl

572 ms

ank3tao.js

147 ms

main.css

125 ms

modernizr-2.8.0.min.js

364 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 33% of them (5 requests) were addressed to the original Rjekker.nl, 67% (10 requests) were made to Use.typekit.net. The less responsive or slowest element that took the longest time to load (632 ms) belongs to the original domain Rjekker.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 44.7 kB (20%)

Content Size

218.6 kB

After Optimization

173.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rjekker.nl main page is 218.6 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. 35% of websites need less resources to load. Images take 166.1 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 26.5 kB

  • Original 29.6 kB
  • After minification 27.7 kB
  • After compression 3.2 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 26.5 kB or 89% of the original size.

Image Optimization

-2%

Potential reduce by 3.0 kB

  • Original 166.1 kB
  • After minification 163.1 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. Rjekker images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 9.4 kB

  • Original 15.5 kB
  • After minification 15.1 kB
  • After compression 6.1 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 9.4 kB or 61% of the original size.

CSS Optimization

-79%

Potential reduce by 5.8 kB

  • Original 7.4 kB
  • After minification 5.8 kB
  • After compression 1.5 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. Rjekker.nl needs all CSS files to be minified and compressed as it can save up to 5.8 kB or 79% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • Images
  • JavaScript
  • CSS

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

Network Requests Diagram

rjekker.nl

rjekker.nl

400 ms

www.rjekker.nl

www.rjekker.nl

572 ms

ank3tao.js

ank3tao.js

147 ms

main.css

main.css

125 ms

modernizr-2.8.0.min.js

modernizr-2.8.0.min.js

364 ms

ff

ff

168 ms

foto.png

foto.png

632 ms

N_rB6M2zEC6Hml96x2JD1V8tGb4fQqUJiJ_GhAoY_dwff5hbgsMWeMI6MK6f5MS.eot

N_rB6M2zEC6Hml96x2JD1V8tGb4fQqUJiJ_GhAoY_dwff5hbgsMWeMI6MK6f5MS.eot

30 ms

957hmFpaaZLxLLTsOkl5E1oC1Qfi8AgyyJRvzzNw2r9ff5cbgsMWeMI6MK6f5Mb.eot

957hmFpaaZLxLLTsOkl5E1oC1Qfi8AgyyJRvzzNw2r9ff5cbgsMWeMI6MK6f5Mb.eot

69 ms

9ZXqOvlHCPZldOI67ph1XG9cwfJJwFP2w1BwIxN9_5Sff5dyggMWeMI6MK6f5Mb.eot

9ZXqOvlHCPZldOI67ph1XG9cwfJJwFP2w1BwIxN9_5Sff5dyggMWeMI6MK6f5Mb.eot

119 ms

1579K9npQO2vFv6mk4_ga_gCNmmYLzDaOTjHcCZJ8mbff5VyggMWeMI6MK6f5MS.eot

1579K9npQO2vFv6mk4_ga_gCNmmYLzDaOTjHcCZJ8mbff5VyggMWeMI6MK6f5MS.eot

150 ms

qWdxxHKVKXUX_DwuLeE21VJQjzdP0ws3N8fksPRzN2Xff5WyggMWeMI6MK6f5Mt.eot

qWdxxHKVKXUX_DwuLeE21VJQjzdP0ws3N8fksPRzN2Xff5WyggMWeMI6MK6f5Mt.eot

151 ms

mOxJB_AzMHEtyltjoAMlpwfNL8Ivl5suzWNWxTHBSwMff5QyggMWeMI6MK6f5gI.eot

mOxJB_AzMHEtyltjoAMlpwfNL8Ivl5suzWNWxTHBSwMff5QyggMWeMI6MK6f5gI.eot

154 ms

Yt5rAVgAbQVofCuZkMv6Hogqat13z0NOlHB5nzuLN7Iff57bgsMWeMI6MK6f5Mt.eot

Yt5rAVgAbQVofCuZkMv6Hogqat13z0NOlHB5nzuLN7Iff57bgsMWeMI6MK6f5Mt.eot

154 ms

miwvrgehu-vOKqZeq6K-JrGgH2d_dlRb_-C7s9B5lIbff5EbgsMWeMI6MK6f5gI.eot

miwvrgehu-vOKqZeq6K-JrGgH2d_dlRb_-C7s9B5lIbff5EbgsMWeMI6MK6f5gI.eot

150 ms

Accessibility Review

rjekker.nl accessibility score

100

Accessibility Issues

Best Practices

rjekker.nl best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

rjekker.nl SEO score

95

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 Rjekker.nl 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 Rjekker.nl 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

rjekker.nl

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