Tools & Wizards About Us
dsm.museum screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    72% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

dsm.museum

Deutsches Schifffahrtsmuseum | DSM Bremerhaven

Page Load Speed

4 sec in total

First Response

405 ms

Resources Loaded

3.3 sec

Page Rendered

243 ms

dsm.museum screenshot

About Website

Welcome to dsm.museum homepage info - get ready to check DSM best content for Germany right away, or after learning these important things about dsm.museum

Das Deutsche Schifffahrtsmuseum in Bremerhaven ist ein Forschungsmuseum der Leibniz-Gemeinschaft und ein Ort der Bildung und des Dialogs im Herzen des Museumshafens.

Visit dsm.museum

Key Findings

We analyzed Dsm.museum page load time and found that the first response time was 405 ms and then it took 3.6 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

dsm.museum performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

65/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value5.3 s

57/100

10%

TBT (Total Blocking Time)

Value310 ms

77/100

30%

CLS (Cumulative Layout Shift)

Value1.091

1/100

15%

TTI (Time to Interactive)

Value4.5 s

82/100

10%

Network Requests Diagram

dsm.museum

405 ms

www.dsm.museum

2091 ms

dsm.css

120 ms

shared.lib.js

204 ms

jquery-1.4.4.min.js

356 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 94% of them (32 requests) were addressed to the original Dsm.museum, 6% (2 requests) were made to Stats.bremerhaven.de. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Dsm.museum.

Page Optimization Overview & Recommendations

Page size can be reduced by 131.8 kB (27%)

Content Size

483.5 kB

After Optimization

351.7 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Dsm.museum main page is 483.5 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. 25% of websites need less resources to load. Images take 300.4 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 31.5 kB

  • Original 40.4 kB
  • After minification 39.8 kB
  • After compression 9.0 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 31.5 kB or 78% of the original size.

Image Optimization

-1%

Potential reduce by 4.2 kB

  • Original 300.4 kB
  • After minification 296.2 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. DSM images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 96.1 kB

  • Original 142.6 kB
  • After minification 131.1 kB
  • After compression 46.5 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 96.1 kB or 67% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (50%)

Requests Now

32

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DSM. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

dsm.museum

dsm.museum

405 ms

www.dsm.museum

www.dsm.museum

2091 ms

dsm.css

dsm.css

120 ms

shared.lib.js

shared.lib.js

204 ms

jquery-1.4.4.min.js

jquery-1.4.4.min.js

356 ms

swfobject.js

swfobject.js

223 ms

flowplayer-3.2.8.min.js

flowplayer-3.2.8.min.js

220 ms

piwik.js

piwik.js

452 ms

search_arrow.gif

search_arrow.gif

203 ms

Ausstellung4.jpg.93.jpg

Ausstellung4.jpg.93.jpg

805 ms

Windrose_%C3%BCber.jpg.1366.jpg

Windrose_%C3%BCber.jpg.1366.jpg

332 ms

wi_wolkig_n.png

wi_wolkig_n.png

307 ms

wind.png

wind.png

320 ms

hochwasser.png

hochwasser.png

321 ms

niedrigwasser.png

niedrigwasser.png

409 ms

ext_link_grey.gif

ext_link_grey.gif

422 ms

dsa36-37_2013-2014.jpg.4130.jpg

dsa36-37_2013-2014.jpg.4130.jpg

536 ms

Teaser_Jubil%C3%A4umsausstellung.jpg.4355.jpg

Teaser_Jubil%C3%A4umsausstellung.jpg.4355.jpg

568 ms

flow_ton-an.gif

flow_ton-an.gif

477 ms

flow_play.gif

flow_play.gif

509 ms

flow_down.gif

flow_down.gif

521 ms

flow_up.gif

flow_up.gif

554 ms

dsm_kinder_startseite.jpg

dsm_kinder_startseite.jpg

616 ms

feed-icon-28x28.png

feed-icon-28x28.png

623 ms

footban_das_meer.jpg

footban_das_meer.jpg

638 ms

logo_wj2013.png

logo_wj2013.png

658 ms

footban_bremerhaven.jpg

footban_bremerhaven.jpg

669 ms

footban_wissenswelten.jpg

footban_wissenswelten.jpg

719 ms

footban_leibniz_gemeinschaft.jpg

footban_leibniz_gemeinschaft.jpg

829 ms

navigation_arrow_white_closed.gif

navigation_arrow_white_closed.gif

622 ms

link_arrow_white.gif

link_arrow_white.gif

642 ms

link_arrow_red.gif

link_arrow_red.gif

652 ms

film-starten96x96.png

film-starten96x96.png

704 ms

piwik.php

piwik.php

270 ms

Accessibility Review

dsm.museum accessibility score

71

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

High

ARIA input fields do not have accessible names

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[aria-*] attributes do not have valid values

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

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

dsm.museum best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

dsm.museum SEO score

83

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

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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 Dsm.museum 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 Dsm.museum 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

dsm.museum

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