Report Summary

  • 25

    Performance

    Renders faster than
    45% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 39% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 74

    SEO

    Google-friendlier than
    32% of websites

jahrhundertkomet.de

Baader Planetarium GmbH – Alles für Astronomie

Page Load Speed

3.4 sec in total

First Response

234 ms

Resources Loaded

2.8 sec

Page Rendered

283 ms

jahrhundertkomet.de screenshot

About Website

Welcome to jahrhundertkomet.de homepage info - get ready to check Jahrhundertkomet best content right away, or after learning these important things about jahrhundertkomet.de

Von Adaptern und optischem Zubehör bis zum Teleskop und zur kompletten Sternwartenkuppel – bei uns gibt es für jeden Astro-Anwender alles aus einer Hand.

Visit jahrhundertkomet.de

Key Findings

We analyzed Jahrhundertkomet.de page load time and found that the first response time was 234 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

jahrhundertkomet.de performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value9.9 s

0/100

25%

SI (Speed Index)

Value6.7 s

37/100

10%

TBT (Total Blocking Time)

Value630 ms

47/100

30%

CLS (Cumulative Layout Shift)

Value0.319

36/100

15%

TTI (Time to Interactive)

Value12.0 s

16/100

10%

Network Requests Diagram

jahrhundertkomet.de

234 ms

www.jahrhundertkomet.de

527 ms

css

27 ms

css

40 ms

css

53 ms

Our browser made a total of 131 requests to load all elements on the main page. We found that 79% of them (104 requests) were addressed to the original Jahrhundertkomet.de, 8% (10 requests) were made to Google.com and 3% (4 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (579 ms) belongs to the original domain Jahrhundertkomet.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 596.6 kB (55%)

Content Size

1.1 MB

After Optimization

488.4 kB

In fact, the total size of Jahrhundertkomet.de main page is 1.1 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. 65% of websites need less resources to load. Images take 437.7 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 38.9 kB

  • Original 47.9 kB
  • After minification 40.9 kB
  • After compression 9.1 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 7.0 kB, which is 15% 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 38.9 kB or 81% of the original size.

Image Optimization

-29%

Potential reduce by 125.4 kB

  • Original 437.7 kB
  • After minification 312.3 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, Jahrhundertkomet needs image optimization as it can save up to 125.4 kB or 29% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 251.9 kB

  • Original 392.4 kB
  • After minification 387.5 kB
  • After compression 140.5 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 251.9 kB or 64% of the original size.

CSS Optimization

-87%

Potential reduce by 180.4 kB

  • Original 207.0 kB
  • After minification 157.5 kB
  • After compression 26.5 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. Jahrhundertkomet.de needs all CSS files to be minified and compressed as it can save up to 180.4 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 49 (40%)

Requests Now

124

After Optimization

75

The browser has sent 124 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jahrhundertkomet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

jahrhundertkomet.de accessibility score

73

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.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

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

Best Practices

jahrhundertkomet.de best practices score

67

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

jahrhundertkomet.de SEO score

74

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

Page is blocked from indexing

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jahrhundertkomet.de 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 Jahrhundertkomet.de 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 description is not detected on the main page of Jahrhundertkomet. 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: