Report Summary

  • 0

    Performance

  • 0

    Accessibility

  • 0

    Best Practices

  • 0

    SEO

csg.ethz.ch

ETH Zurich - Communication Systems Group - Communication Systems Group

Page Load Speed

4.4 sec in total

First Response

509 ms

Resources Loaded

3.7 sec

Page Rendered

187 ms

csg.ethz.ch screenshot

About Website

Welcome to csg.ethz.ch homepage info - get ready to check Csg ETH Z best content for Switzerland right away, or after learning these important things about csg.ethz.ch

Communication Systems Group Website

Visit csg.ethz.ch

Key Findings

We analyzed Csg.ethz.ch page load time and found that the first response time was 509 ms and then it took 3.9 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

csg.ethz.ch performance score

0

Network Requests Diagram

csg.ethz.ch

509 ms

www.csg.ethz.ch

1134 ms

colors_c130.css

432 ms

ns4.css

330 ms

modernbrowsers.css

647 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that all of those requests were addressed to Csg.ethz.ch and no external sources were called. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Csg.ethz.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 141.6 kB (52%)

Content Size

272.8 kB

After Optimization

131.2 kB

In fact, the total size of Csg.ethz.ch main page is 272.8 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. Only 5% of websites need less resources to load. Images take 101.9 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 19.8 kB

  • Original 25.6 kB
  • After minification 19.4 kB
  • After compression 5.8 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 6.2 kB, which is 24% 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 19.8 kB or 77% of the original size.

Image Optimization

-17%

Potential reduce by 17.4 kB

  • Original 101.9 kB
  • After minification 84.5 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, Csg ETH Z needs image optimization as it can save up to 17.4 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-67%

Potential reduce by 67.4 kB

  • Original 101.1 kB
  • After minification 96.3 kB
  • After compression 33.7 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 67.4 kB or 67% of the original size.

CSS Optimization

-84%

Potential reduce by 37.0 kB

  • Original 44.2 kB
  • After minification 29.6 kB
  • After compression 7.2 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. Csg.ethz.ch needs all CSS files to be minified and compressed as it can save up to 37.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (52%)

Requests Now

31

After Optimization

15

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Csg ETH Z. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for CSS and as a result speed up the page load time.

SEO Factors

csg.ethz.ch SEO score

0

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Csg.ethz.ch can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Csg.ethz.ch 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 Csg ETH Z. 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: