Tools & Wizards About Us
prosim4u.nl screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 81

    SEO

    Google-friendlier than
    42% of websites

prosim4u.nl

Flightsimulations for everybody - Prosim4u-vliegsimulaties

Page Load Speed

4.7 sec in total

First Response

369 ms

Resources Loaded

4.1 sec

Page Rendered

242 ms

prosim4u.nl screenshot

About Website

Welcome to prosim4u.nl homepage info - get ready to check Prosim4u best content right away, or after learning these important things about prosim4u.nl

Flightsimulations for Everybody! ake charge as the captain of a realistic Boeing 737-800 cockpit with our special gift card offer. Bring along two passengers and embark on an unforgettable adventure.

Visit prosim4u.nl

Key Findings

We analyzed Prosim4u.nl page load time and found that the first response time was 369 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

prosim4u.nl performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value6.2 s

11/100

25%

SI (Speed Index)

Value11.5 s

5/100

10%

TBT (Total Blocking Time)

Value1,600 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.108

88/100

15%

TTI (Time to Interactive)

Value19.7 s

2/100

10%

Network Requests Diagram

prosim4u.nl

369 ms

549 ms

12e9e228773630cf747ff2125.js

127 ms

gtm.js

108 ms

jquery.min.js

19 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 50% of them (29 requests) were addressed to the original Prosim4u.nl, 12% (7 requests) were made to Youtube.com and 9% (5 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (694 ms) belongs to the original domain Prosim4u.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 134.7 kB (10%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Prosim4u.nl main page is 1.3 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. 80% 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 615.3 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 46.4 kB

  • Original 64.0 kB
  • After minification 61.5 kB
  • After compression 17.5 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 46.4 kB or 73% of the original size.

Image Optimization

-5%

Potential reduce by 27.8 kB

  • Original 615.3 kB
  • After minification 587.5 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. Prosim4u images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 58.1 kB

  • Original 596.5 kB
  • After minification 596.5 kB
  • After compression 538.4 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

-3%

Potential reduce by 2.3 kB

  • Original 72.9 kB
  • After minification 72.9 kB
  • After compression 70.6 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. Prosim4u.nl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 28 (54%)

Requests Now

52

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Prosim4u. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

prosim4u.nl

prosim4u.nl

369 ms

549 ms

12e9e228773630cf747ff2125.js

12e9e228773630cf747ff2125.js

127 ms

gtm.js

gtm.js

108 ms

jquery.min.js

jquery.min.js

19 ms

file-optimizer.php

file-optimizer.php

304 ms

file-optimizer.php

file-optimizer.php

284 ms

file-optimizer.php

file-optimizer.php

498 ms

file-optimizer.php

file-optimizer.php

297 ms

file-optimizer.php

file-optimizer.php

694 ms

js

js

122 ms

loader.js

loader.js

34 ms

file-optimizer.php

file-optimizer.php

388 ms

i18n.min.js

i18n.min.js

370 ms

file-optimizer.php

file-optimizer.php

482 ms

destination

destination

72 ms

style.css

style.css

97 ms

js

js

84 ms

prosim4u_logo_wit.png

prosim4u_logo_wit.png

156 ms

search_icon.png

search_icon.png

107 ms

select_menu_arrows.png

select_menu_arrows.png

117 ms

site_bg.jpg

site_bg.jpg

112 ms

substrate_bg.png

substrate_bg.png

100 ms

button_bg.png

button_bg.png

100 ms

image_4.png

image_4.png

190 ms

cockpit-p4u-700x394-e15827039564751.png

cockpit-p4u-700x394-e15827039564751.png

644 ms

Cadeaubon-Engels-1.png

Cadeaubon-Engels-1.png

520 ms

slideboeing737_2.png

slideboeing737_2.png

239 ms

A320_transp_slide.png

A320_transp_slide.png

642 ms

Beechcraft_Baron_58TC_transparant.png

Beechcraft_Baron_58TC_transparant.png

517 ms

sildecessna.png

sildecessna.png

641 ms

Rift1.gif

Rift1.gif

516 ms

main_slider_arrows.png

main_slider_arrows.png

518 ms

action.png

action.png

641 ms

lUB8OLd3u9U

lUB8OLd3u9U

141 ms

assistantLoader.latest.js

assistantLoader.latest.js

55 ms

creteround-regular-webfont.woff

creteround-regular-webfont.woff

591 ms

insight.min.js

insight.min.js

59 ms

analytics.js

analytics.js

53 ms

iframe_api

iframe_api

74 ms

insight.beta.min.js

insight.beta.min.js

18 ms

collect

collect

19 ms

collect

collect

41 ms

insight_tag_errors.gif

insight_tag_errors.gif

377 ms

www-widgetapi.js

www-widgetapi.js

12 ms

js

js

264 ms

ga-audiences

ga-audiences

64 ms

www-player.css

www-player.css

6 ms

www-embed-player.js

www-embed-player.js

26 ms

base.js

base.js

53 ms

ad_status.js

ad_status.js

238 ms

yHiuAayzh7ZXFXvbIOrPkyv85wwmgA2suXoAI6Ktxww.js

yHiuAayzh7ZXFXvbIOrPkyv85wwmgA2suXoAI6Ktxww.js

176 ms

embed.js

embed.js

132 ms

file-optimizer.php

file-optimizer.php

140 ms

id

id

42 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

133 ms

KFOlCnqEu92Fr1MmEU9fBBc-.woff

KFOlCnqEu92Fr1MmEU9fBBc-.woff

135 ms

li_sync

li_sync

39 ms

Accessibility Review

prosim4u.nl accessibility score

87

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

Form elements do not have associated labels

Best Practices

prosim4u.nl 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

prosim4u.nl SEO score

81

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

High

Tap targets are not sized appropriately

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 Prosim4u.nl 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 Prosim4u.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

prosim4u.nl

Open Graph data is detected on the main page of Prosim4u. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: