Report Summary

  • 30


    Renders faster than
    50% of other websites

  • 0


  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 0


Allnet Flat Vergleich » Günstiger Handyvertrag mit & ohne Handy

Page Load Speed

4.5 sec in total

First Response

420 ms

Resources Loaded

3.2 sec

Page Rendered

902 ms screenshot

About Website

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Key Findings

We analyzed page load time and found that the first response time was 420 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics performance score


Measured Metrics





FCP (First Contentful Paint)

Value3.6 s



LCP (Largest Contentful Paint)

Value4.3 s



SI (Speed Index)

Value10.0 s



TBT (Total Blocking Time)

Value9,120 ms



CLS (Cumulative Layout Shift)




TTI (Time to Interactive)

Value15.4 s



Network Requests Diagram

420 ms


180 ms


210 ms


213 ms


376 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 94% of them (99 requests) were addressed to the original, 2% (2 requests) were made to and 1% (1 request) were made to The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain

Page Optimization Overview & Recommendations

Page size can be reduced by 741.2 kB (57%)

Content Size

1.3 MB

After Optimization

557.0 kB

In fact, the total size of 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. 50% of websites need less resources to load. HTML takes 505.3 kB which makes up the majority of the site volume.

HTML Optimization


Potential reduce by 466.8 kB

  • Original 505.3 kB
  • After minification 504.4 kB
  • After compression 38.5 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 466.8 kB or 92% of the original size.

Image Optimization


Potential reduce by 12.7 kB

  • Original 416.8 kB
  • After minification 404.1 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. Allnet Flat images are well optimized though.

JavaScript Optimization


Potential reduce by 232.0 kB

  • Original 340.6 kB
  • After minification 329.5 kB
  • After compression 108.6 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 232.0 kB or 68% of the original size.

CSS Optimization


Potential reduce by 29.7 kB

  • Original 35.6 kB
  • After minification 28.7 kB
  • After compression 5.8 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 29.7 kB or 84% of the original size.

Requests Breakdown

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

Requests Now


After Optimization


The browser has sent 99 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Allnet Flat. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Best Practices best practices score


Areas of Improvement

Trust and Safety




Does not use HTTPS


Ensure CSP is effective against XSS attacks

User Experience




Serves images with low resolution





Detected JavaScript libraries

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 German 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 Allnet Flat. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: