Tools & Wizards About Us
dedijk.atlascollege.nl screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

dedijk.atlascollege.nl

SG De Dijk - een kleine school met grote mogelijkheden!

Page Load Speed

6.7 sec in total

First Response

450 ms

Resources Loaded

5.5 sec

Page Rendered

745 ms

dedijk.atlascollege.nl screenshot

About Website

Welcome to dedijk.atlascollege.nl homepage info - get ready to check De Dijk Atlascollege best content for Netherlands right away, or after learning these important things about dedijk.atlascollege.nl

Op SG De Dijk ontwikkel je je met optimale ondersteuning in een vertrouwde omgeving. Je kunt bij ons terecht met vwo-, havo-, mavo- en vmbo-advies en wij bieden Fast Lane English, de plusvakken Intern...

Visit dedijk.atlascollege.nl

Key Findings

We analyzed Dedijk.atlascollege.nl page load time and found that the first response time was 450 ms and then it took 6.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

dedijk.atlascollege.nl performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

11/100

10%

LCP (Largest Contentful Paint)

Value29.6 s

0/100

25%

SI (Speed Index)

Value19.7 s

0/100

10%

TBT (Total Blocking Time)

Value4,140 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.105

88/100

15%

TTI (Time to Interactive)

Value31.3 s

0/100

10%

Network Requests Diagram

dedijk.atlascollege.nl

450 ms

dedijk.atlascollege.nl

368 ms

www.sgdedijk.nl

3104 ms

sbi-styles.min.css

435 ms

style.min.css

519 ms

Our browser made a total of 76 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Dedijk.atlascollege.nl, 80% (61 requests) were made to Sgdedijk.nl and 7% (5 requests) were made to Use.fontawesome.com. The less responsive or slowest element that took the longest time to load (3.1 sec) relates to the external source Sgdedijk.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.1 MB (34%)

Content Size

6.0 MB

After Optimization

4.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Dedijk.atlascollege.nl main page is 6.0 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.6 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 247.5 kB

  • Original 289.3 kB
  • After minification 283.0 kB
  • After compression 41.8 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 247.5 kB or 86% of the original size.

Image Optimization

-6%

Potential reduce by 214.5 kB

  • Original 3.6 MB
  • After minification 3.3 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. De Dijk Atlascollege images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 1.0 MB

  • Original 1.5 MB
  • After minification 1.5 MB
  • After compression 433.0 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 1.0 MB or 70% of the original size.

CSS Optimization

-78%

Potential reduce by 577.0 kB

  • Original 744.2 kB
  • After minification 723.4 kB
  • After compression 167.1 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. Dedijk.atlascollege.nl needs all CSS files to be minified and compressed as it can save up to 577.0 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 37 (56%)

Requests Now

66

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 66 CSS, Javascripts, AJAX and image requests in order to completely render the main page of De Dijk Atlascollege. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

dedijk.atlascollege.nl

dedijk.atlascollege.nl

450 ms

dedijk.atlascollege.nl

dedijk.atlascollege.nl

368 ms

www.sgdedijk.nl

www.sgdedijk.nl

3104 ms

sbi-styles.min.css

sbi-styles.min.css

435 ms

style.min.css

style.min.css

519 ms

mediaelementplayer-legacy.min.css

mediaelementplayer-legacy.min.css

265 ms

wp-mediaelement.min.css

wp-mediaelement.min.css

263 ms

styles.css

styles.css

263 ms

skins.css

skins.css

340 ms

everest-forms.css

everest-forms.css

437 ms

dashicons.min.css

dashicons.min.css

521 ms

css

css

42 ms

renew.css

renew.css

693 ms

style.css

style.css

424 ms

jquery.qtip.min.css

jquery.qtip.min.css

509 ms

default-calendar-grid.min.css

default-calendar-grid.min.css

521 ms

default-calendar-list.min.css

default-calendar-list.min.css

522 ms

all.css

all.css

43 ms

v4-shims.css

v4-shims.css

59 ms

social-logos.min.css

social-logos.min.css

428 ms

jetpack.css

jetpack.css

520 ms

jquery.min.js

jquery.min.js

524 ms

jquery-migrate.min.js

jquery-migrate.min.js

436 ms

pintra-redirect.js

pintra-redirect.js

827 ms

css

css

21 ms

css

css

19 ms

rs6.css

rs6.css

428 ms

cs-classic.7.4.19.js

cs-classic.7.4.19.js

742 ms

rbtools.min.js

rbtools.min.js

744 ms

rs6.min.js

rs6.min.js

962 ms

x.js

x.js

743 ms

comment-reply.min.js

comment-reply.min.js

743 ms

jquery.qtip.min.js

jquery.qtip.min.js

872 ms

default-calendar.min.js

default-calendar.min.js

872 ms

e-202435.js

e-202435.js

13 ms

imagesloaded.pkgd.min.js

imagesloaded.pkgd.min.js

872 ms

mediaelement-and-player.min.js

mediaelement-and-player.min.js

874 ms

mediaelement-migrate.min.js

mediaelement-migrate.min.js

872 ms

sbi-scripts.min.js

sbi-scripts.min.js

963 ms

flexslider.js

flexslider.js

965 ms

css

css

18 ms

gtm.js

gtm.js

407 ms

sbi-sprite.png

sbi-sprite.png

475 ms

DeDijk_RGB_PNG.png

DeDijk_RGB_PNG.png

475 ms

dummy.png

dummy.png

475 ms

vmbo-de-dijk-middelbare-school.png

vmbo-de-dijk-middelbare-school.png

624 ms

mavo-de-dijk-middelbare-school-1.png

mavo-de-dijk-middelbare-school-1.png

625 ms

havo-de-dijk-middelbare-school.png

havo-de-dijk-middelbare-school.png

625 ms

vwo-de-dijk-middelbare-school.png

vwo-de-dijk-middelbare-school.png

625 ms

Zomerkamp-leerlingen-SG-De-Dijk.jpg

Zomerkamp-leerlingen-SG-De-Dijk.jpg

626 ms

Preventie-markt.jpg

Preventie-markt.jpg

629 ms

Geef-je-op-voor-de-ouder-kindlessen-op-onze-open-dag_20231102_065955_0000.png

Geef-je-op-voor-de-ouder-kindlessen-op-onze-open-dag_20231102_065955_0000.png

651 ms

atlas-middelbare-school-dijk-de-dijk.png

atlas-middelbare-school-dijk-de-dijk.png

840 ms

Moeder-2.png

Moeder-2.png

752 ms

veiligheid-school-middelbare-vwo-mavo-havo.png

veiligheid-school-middelbare-vwo-mavo-havo.png

627 ms

placeholder.png

placeholder.png

627 ms

MGL7093-scaled.jpg

MGL7093-scaled.jpg

932 ms

MGL8794-scaled.jpg

MGL8794-scaled.jpg

811 ms

Diap-Logo.png

Diap-Logo.png

754 ms

logo-atlas-diap-238px.png

logo-atlas-diap-238px.png

754 ms

mijn-dijk-2.png

mijn-dijk-2.png

810 ms

mijn-dijk-facebook-2.png

mijn-dijk-facebook-2.png

811 ms

dijk-tik-tok-1.png

dijk-tik-tok-1.png

827 ms

Youtube_dedijk.png

Youtube_dedijk.png

841 ms

middelbare-school.png

middelbare-school.png

780 ms

font

font

402 ms

font

font

402 ms

fa-regular-400.woff

fa-regular-400.woff

311 ms

fa-solid-900.woff

fa-solid-900.woff

401 ms

fa-brands-400.woff

fa-brands-400.woff

401 ms

fa-solid-900.ttf

fa-solid-900.ttf

793 ms

middelbare-school-havo.png

middelbare-school-havo.png

653 ms

De-Dijk-quotes-vwo-havo-vmbo.png

De-Dijk-quotes-vwo-havo-vmbo.png

676 ms

De-Dijk-quotes-vwo-mavo-vmbo.png

De-Dijk-quotes-vwo-mavo-vmbo.png

676 ms

fa-light-300.ttf

fa-light-300.ttf

725 ms

fa-brands-400.ttf

fa-brands-400.ttf

610 ms

Accessibility Review

dedijk.atlascollege.nl accessibility score

96

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.

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

Links do not have a discernible name

Best Practices

dedijk.atlascollege.nl best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

dedijk.atlascollege.nl SEO score

93

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

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

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dedijk.atlascollege.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Dedijk.atlascollege.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

dedijk.atlascollege.nl

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