Report Summary

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    Best Practices

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Page Load Speed

3.6 sec in total

First Response

343 ms

Resources Loaded

2.9 sec

Page Rendered

308 ms screenshot

About Website

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Key Findings

We analyzed page load time and found that the first response time was 343 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics performance score


Network Requests Diagram

343 ms

911 ms


100 ms


194 ms


255 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 66% of them (38 requests) were addressed to the original, 9% (5 requests) were made to and 3% (2 requests) were made to The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source

Page Optimization Overview & Recommendations

Page size can be reduced by 751.7 kB (47%)

Content Size

1.6 MB

After Optimization

852.9 kB

In fact, the total size of main page is 1.6 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. 50% of websites need less resources to load. Javascripts take 671.8 kB which makes up the majority of the site volume.

HTML Optimization


Potential reduce by 77.8 kB

  • Original 94.5 kB
  • After minification 89.4 kB
  • After compression 16.7 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 77.8 kB or 82% of the original size.

Image Optimization


Potential reduce by 45.2 kB

  • Original 621.9 kB
  • After minification 576.8 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. Onderdelen Direct images are well optimized though.

JavaScript Optimization


Potential reduce by 442.6 kB

  • Original 671.8 kB
  • After minification 654.5 kB
  • After compression 229.3 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 442.6 kB or 66% of the original size.

CSS Optimization


Potential reduce by 186.2 kB

  • Original 216.3 kB
  • After minification 183.3 kB
  • After compression 30.1 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. needs all CSS files to be minified and compressed as it can save up to 186.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (59%)

Requests Now


After Optimization


The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Onderdelen Direct. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

SEO Factors SEO score


Language and Encoding

  • Language Detected


  • Language Claimed


  • Encoding


Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 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 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 Onderdelen Direct. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: