Tools & Wizards About Us
harlemlakers.nl screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

harlemlakers.nl

Harlemlakers – Sportcentrum Caland Amsterdam

Page Load Speed

2.2 sec in total

First Response

512 ms

Resources Loaded

1.3 sec

Page Rendered

384 ms

harlemlakers.nl screenshot

About Website

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

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Key Findings

We analyzed Harlemlakers.nl page load time and found that the first response time was 512 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

harlemlakers.nl performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value19.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value33.7 s

0/100

25%

SI (Speed Index)

Value27.5 s

0/100

10%

TBT (Total Blocking Time)

Value1,130 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0.129

82/100

15%

TTI (Time to Interactive)

Value33.8 s

0/100

10%

Network Requests Diagram

harlemlakers.nl

512 ms

ajxmenu_HL.css

205 ms

ajxmenu_HL.js

215 ms

stat.aspx

193 ms

Banner3dg.jpg

204 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 97% of them (29 requests) were addressed to the original Harlemlakers.nl, 3% (1 request) were made to Stat.onestat.com. The less responsive or slowest element that took the longest time to load (762 ms) belongs to the original domain Harlemlakers.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 77.0 kB (21%)

Content Size

374.9 kB

After Optimization

297.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Harlemlakers.nl main page is 374.9 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. 20% of websites need less resources to load. Images take 308.0 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 48.7 kB

  • Original 56.6 kB
  • After minification 46.2 kB
  • After compression 7.8 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. This page needs HTML code to be minified as it can gain 10.4 kB, which is 18% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 48.7 kB or 86% of the original size.

Image Optimization

-7%

Potential reduce by 20.9 kB

  • Original 308.0 kB
  • After minification 287.1 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. Harlemlakers images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 3.5 kB

  • Original 5.2 kB
  • After minification 5.2 kB
  • After compression 1.8 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 3.5 kB or 66% of the original size.

CSS Optimization

-78%

Potential reduce by 4.0 kB

  • Original 5.1 kB
  • After minification 4.8 kB
  • After compression 1.1 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. Harlemlakers.nl needs all CSS files to be minified and compressed as it can save up to 4.0 kB or 78% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

29

After Optimization

29

  • Images
  • JavaScript
  • CSS

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Harlemlakers. According to our analytics all requests are already optimized.

Network Requests Diagram

harlemlakers.nl

harlemlakers.nl

512 ms

ajxmenu_HL.css

ajxmenu_HL.css

205 ms

ajxmenu_HL.js

ajxmenu_HL.js

215 ms

stat.aspx

stat.aspx

193 ms

Banner3dg.jpg

Banner3dg.jpg

204 ms

menu-bg.jpg

menu-bg.jpg

106 ms

top-sub.gif

top-sub.gif

106 ms

top-mo.gif

top-mo.gif

202 ms

sub-sub.gif

sub-sub.gif

208 ms

AAC2.jpg

AAC2.jpg

211 ms

ccs_logo_small2.jpg

ccs_logo_small2.jpg

208 ms

Surfays.jpg

Surfays.jpg

210 ms

letterexpert.jpg

letterexpert.jpg

303 ms

email.png

email.png

303 ms

clubcollect.jpg

clubcollect.jpg

309 ms

linkedin2.jpg

linkedin2.jpg

310 ms

JSF_slogan_RGB_300dpi.jpg

JSF_slogan_RGB_300dpi.jpg

313 ms

Beker_2014-2015.png

Beker_2014-2015.png

313 ms

logo_125_64610832.gif

logo_125_64610832.gif

403 ms

twitter.png

twitter.png

402 ms

linkedin3.jpg

linkedin3.jpg

412 ms

FB.jpg

FB.jpg

410 ms

DSC_0089_klein.jpg

DSC_0089_klein.jpg

762 ms

DSC_0107_klein.jpg

DSC_0107_klein.jpg

519 ms

WEBWINKEL.jpg

WEBWINKEL.jpg

503 ms

NBB_logo_NIEUWS.jpg

NBB_logo_NIEUWS.jpg

503 ms

NBB_logo_ORANGE%20LIONS.jpg

NBB_logo_ORANGE%20LIONS.jpg

512 ms

DBL.jpg

DBL.jpg

513 ms

NBB_logo_DTL.jpg

NBB_logo_DTL.jpg

602 ms

Banner-onder4.jpg

Banner-onder4.jpg

602 ms

Accessibility Review

harlemlakers.nl accessibility score

75

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

harlemlakers.nl best practices score

75

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

SEO Factors

harlemlakers.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

    N/A

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Harlemlakers.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch 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 Harlemlakers.nl main page’s claimed encoding is windows-1252. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

harlemlakers.nl

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