Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

dehaaien.nl

De Haaien | Zwemclub

Page Load Speed

2.8 sec in total

First Response

266 ms

Resources Loaded

2.3 sec

Page Rendered

211 ms

dehaaien.nl screenshot

About Website

Visit dehaaien.nl now to see the best up-to-date De Haaien content and also check out these interesting facts you probably never knew about dehaaien.nl

L.Z & P.C. De Haaien - Iedereen die kiest voor de zwemsport, heeft de keuze uit zwemmen op wedstrijdniveau of recreatieniveau

Visit dehaaien.nl

Key Findings

We analyzed Dehaaien.nl page load time and found that the first response time was 266 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

dehaaien.nl performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.9 s

10/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

10/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0.062

97/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

dehaaien.nl

266 ms

www.dehaaien.nl

264 ms

colorbox.css

129 ms

hotlogin.css

188 ms

mod_super_login.css.php

347 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that all of those requests were addressed to Dehaaien.nl and no external sources were called. The less responsive or slowest element that took the longest time to load (961 ms) belongs to the original domain Dehaaien.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 550.1 kB (47%)

Content Size

1.2 MB

After Optimization

616.7 kB

In fact, the total size of Dehaaien.nl main page is 1.2 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. 30% of websites need less resources to load. Javascripts take 554.3 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 21.8 kB

  • Original 28.6 kB
  • After minification 26.3 kB
  • After compression 6.8 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 21.8 kB or 76% of the original size.

Image Optimization

-18%

Potential reduce by 96.4 kB

  • Original 522.3 kB
  • After minification 425.9 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. Obviously, De Haaien needs image optimization as it can save up to 96.4 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-69%

Potential reduce by 380.7 kB

  • Original 554.3 kB
  • After minification 545.1 kB
  • After compression 173.6 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 380.7 kB or 69% of the original size.

CSS Optimization

-83%

Potential reduce by 51.3 kB

  • Original 61.7 kB
  • After minification 46.4 kB
  • After compression 10.4 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. Dehaaien.nl needs all CSS files to be minified and compressed as it can save up to 51.3 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (69%)

Requests Now

49

After Optimization

15

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of De Haaien. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

dehaaien.nl accessibility score

95

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

dehaaien.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

dehaaien.nl SEO score

93

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

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 Dehaaien.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 Dehaaien.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

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