Report Summary

  • 49

    Performance

    Renders faster than
    68% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

nnmarathonrotterdam.org

NN Marathon Rotterdam

Page Load Speed

4.2 sec in total

First Response

633 ms

Resources Loaded

3.4 sec

Page Rendered

171 ms

nnmarathonrotterdam.org screenshot

About Website

Visit nnmarathonrotterdam.org now to see the best up-to-date NN Marathon Rotterdam content for Taiwan and also check out these interesting facts you probably never knew about nnmarathonrotterdam.org

Every year in the first weekend of April the NN Marathon Rotterdam takes place. The world’s top athletes as well as thousands of runners from home and abroad get to experience what it’s like to finish...

Visit nnmarathonrotterdam.org

Key Findings

We analyzed Nnmarathonrotterdam.org page load time and found that the first response time was 633 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

nnmarathonrotterdam.org performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

43/100

10%

LCP (Largest Contentful Paint)

Value7.6 s

4/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value150 ms

94/100

30%

CLS (Cumulative Layout Shift)

Value0.041

99/100

15%

TTI (Time to Interactive)

Value15.8 s

6/100

10%

Network Requests Diagram

www.nnmarathonrotterdam.org

633 ms

index.min.css

85 ms

responsive.min.css

167 ms

marathon-rotterdamGB-2.css

165 ms

jquery.min.js

33 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 84% of them (38 requests) were addressed to the original Nnmarathonrotterdam.org, 4% (2 requests) were made to Ajax.aspnetcdn.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Nnmarathonrotterdam.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 178.1 kB (8%)

Content Size

2.3 MB

After Optimization

2.1 MB

In fact, the total size of Nnmarathonrotterdam.org main page is 2.3 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. 35% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 10.9 kB

  • Original 15.4 kB
  • After minification 14.7 kB
  • After compression 4.5 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 10.9 kB or 71% of the original size.

Image Optimization

-4%

Potential reduce by 79.5 kB

  • Original 2.1 MB
  • After minification 2.0 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. NN Marathon Rotterdam images are well optimized though.

JavaScript Optimization

-45%

Potential reduce by 65.7 kB

  • Original 144.7 kB
  • After minification 137.0 kB
  • After compression 79.0 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 65.7 kB or 45% of the original size.

CSS Optimization

-78%

Potential reduce by 22.0 kB

  • Original 28.2 kB
  • After minification 25.1 kB
  • After compression 6.3 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. Nnmarathonrotterdam.org needs all CSS files to be minified and compressed as it can save up to 22.0 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (44%)

Requests Now

43

After Optimization

24

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NN Marathon Rotterdam. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

nnmarathonrotterdam.org accessibility score

51

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

nnmarathonrotterdam.org 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

High

Missing source maps for large first-party JavaScript

SEO Factors

nnmarathonrotterdam.org SEO score

69

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

High

Image elements do not have [alt] attributes

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nnmarathonrotterdam.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Dutch language. Our system also found out that Nnmarathonrotterdam.org 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 NN Marathon Rotterdam. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: