Tools & Wizards About Us

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

lehrfilme.eu

Klimaforschung: Klimaerwärmung nicht durch Industrieabgase !?

Page Load Speed

4.2 sec in total

First Response

1.2 sec

Resources Loaded

1.7 sec

Page Rendered

1.2 sec

About Website

Welcome to lehrfilme.eu homepage info - get ready to check Lehrfilme best content right away, or after learning these important things about lehrfilme.eu

NEUE Ergebnisse der Klimaforschung. Vergleicht man aber die seit ca. 50 Jahren rapide angestiegenen Umweltschäden, mit dem zeitgleich stark angestiegenen Funkverkehr, sind tatsächlich Parallelen zur K...

Visit lehrfilme.eu

Key Findings

We analyzed Lehrfilme.eu page load time and found that the first response time was 1.2 sec and then it took 2.9 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

lehrfilme.eu performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value6.7 s

8/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value3,180 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.257

48/100

15%

TTI (Time to Interactive)

Value20.1 s

2/100

10%

Network Requests Diagram

lehrfilme.eu

1244 ms

show_afs_search.js

15 ms

videomeld.gif

542 ms

Flaggen_USA.jpg

644 ms

link-pfeil.jpg

631 ms

Our browser made a total of 91 requests to load all elements on the main page. We found that 35% of them (32 requests) were addressed to the original Lehrfilme.eu, 46% (42 requests) were made to Klimaforschung.net and 5% (5 requests) were made to Poolalarm.de. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Lehrfilme.eu.

Page Optimization Overview & Recommendations

Page size can be reduced by 260.9 kB (29%)

Content Size

903.2 kB

After Optimization

642.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Lehrfilme.eu main page is 903.2 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. 35% of websites need less resources to load. Images take 605.7 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 241.6 kB

  • Original 285.4 kB
  • After minification 235.1 kB
  • After compression 43.8 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 50.3 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 241.6 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 13.9 kB

  • Original 605.7 kB
  • After minification 591.8 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. Lehrfilme images are well optimized though.

JavaScript Optimization

-45%

Potential reduce by 5.5 kB

  • Original 12.2 kB
  • After minification 11.6 kB
  • After compression 6.7 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 5.5 kB or 45% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (13%)

Requests Now

90

After Optimization

78

  • Images
  • JavaScript

The browser has sent 90 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lehrfilme. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

lehrfilme.eu accessibility score

55

Accessibility Issues

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-*] attributes do not match their roles

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

[id] attributes on active, focusable elements 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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

lehrfilme.eu best practices score

50

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

lehrfilme.eu SEO score

58

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

Image elements do not have [alt] attributes

High

Document uses plugins

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    DE

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lehrfilme.eu 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 Lehrfilme.eu 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

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