Report Summary

  • 67

    Performance

    Renders faster than
    80% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

congress.ch

Congress Center und Messe Basel | Eventlocation mitten in der Stadt

Page Load Speed

11.3 sec in total

First Response

340 ms

Resources Loaded

10.7 sec

Page Rendered

265 ms

congress.ch screenshot

About Website

Click here to check amazing Congress content for Switzerland. Otherwise, check out these important facts you probably never knew about congress.ch

Fünf grosszügige Hallen und 25 moderne Konferenzräume auf einer Gesamtfläche von 141'000 m² - und das in mitten von Basel. Jetzt entdecken!

Visit congress.ch

Key Findings

We analyzed Congress.ch page load time and found that the first response time was 340 ms and then it took 11 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

congress.ch performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

54/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value3.3 s

90/100

10%

TBT (Total Blocking Time)

Value290 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.183

66/100

15%

TTI (Time to Interactive)

Value5.3 s

73/100

10%

Network Requests Diagram

congress.ch

340 ms

www.congress.ch

747 ms

portalbuehne_did.css

552 ms

modernizr-2.6.2-respond-1.1.0.min.js

404 ms

jquery.min.js

47 ms

Our browser made a total of 87 requests to load all elements on the main page. We found that 30% of them (26 requests) were addressed to the original Congress.ch, 17% (15 requests) were made to Maps.googleapis.com and 14% (12 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (8.7 sec) belongs to the original domain Congress.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.4 MB (15%)

Content Size

9.7 MB

After Optimization

8.2 MB

In fact, the total size of Congress.ch main page is 9.7 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. 70% of websites need less resources to load. Images take 7.9 MB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 23.6 kB

  • Original 34.3 kB
  • After minification 31.1 kB
  • After compression 10.7 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 23.6 kB or 69% of the original size.

Image Optimization

-1%

Potential reduce by 98.6 kB

  • Original 7.9 MB
  • After minification 7.8 MB

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. Congress images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 898.5 kB

  • Original 1.3 MB
  • After minification 1.2 MB
  • After compression 400.6 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 898.5 kB or 69% of the original size.

CSS Optimization

-89%

Potential reduce by 386.8 kB

  • Original 435.0 kB
  • After minification 335.6 kB
  • After compression 48.2 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. Congress.ch needs all CSS files to be minified and compressed as it can save up to 386.8 kB or 89% of the original size.

Requests Breakdown

Number of requests can be reduced by 40 (50%)

Requests Now

80

After Optimization

40

The browser has sent 80 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Congress. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

congress.ch accessibility score

96

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

congress.ch best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

congress.ch SEO score

100

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Congress.ch can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it does not match the claimed English language. Our system also found out that Congress.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 Congress. 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: