Report Summary

  • 75

    Performance

    Renders faster than
    84% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 85

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 97

    SEO

    Google-friendlier than
    92% of websites

uboat.net

The U-boat Wars 1939-1945 (Kriegsmarine) and 1914-1918 (Kaiserliche Marine) and Allied Warships of WWII - uboat.net

Page Load Speed

1.9 sec in total

First Response

114 ms

Resources Loaded

1.3 sec

Page Rendered

516 ms

uboat.net screenshot

About Website

Visit uboat.net now to see the best up-to-date U Boat content for United States and also check out these interesting facts you probably never knew about uboat.net

The U-boat War in World War Two (1939-1945) and World War One (1914-1918). Over 30,000 pages on the officers, the boats, technology and the Allied efforts to counter the U-boat threat.

Visit uboat.net

Key Findings

We analyzed Uboat.net page load time and found that the first response time was 114 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

uboat.net performance score

75

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.5 s

97/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

67/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value470 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0.024

100/100

15%

TTI (Time to Interactive)

Value6.4 s

60/100

10%

Network Requests Diagram

uboat.net

114 ms

main.css

28 ms

adsbygoogle.js

5 ms

show_ads.js

6 ms

analytics.js

294 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 40% of them (12 requests) were addressed to the original Uboat.net, 17% (5 requests) were made to Pagead2.googlesyndication.com and 13% (4 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (556 ms) relates to the external source Googleads.g.doubleclick.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 48.5 kB (39%)

Content Size

125.9 kB

After Optimization

77.3 kB

In fact, the total size of Uboat.net main page is 125.9 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. 45% of websites need less resources to load. Javascripts take 46.8 kB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 11.0 kB

  • Original 16.5 kB
  • After minification 15.1 kB
  • After compression 5.6 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 11.0 kB or 66% of the original size.

Image Optimization

-3%

Potential reduce by 1.1 kB

  • Original 38.4 kB
  • After minification 37.3 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. U Boat images are well optimized though.

JavaScript Optimization

-34%

Potential reduce by 16.0 kB

  • Original 46.8 kB
  • After minification 46.7 kB
  • After compression 30.8 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 16.0 kB or 34% of the original size.

CSS Optimization

-85%

Potential reduce by 20.4 kB

  • Original 24.1 kB
  • After minification 14.8 kB
  • After compression 3.7 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. Uboat.net needs all CSS files to be minified and compressed as it can save up to 20.4 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (25%)

Requests Now

28

After Optimization

21

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of U Boat. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

uboat.net accessibility score

75

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.

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

uboat.net best practices score

85

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

Serves images with low resolution

SEO Factors

uboat.net SEO score

97

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Uboat.net can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Uboat.net 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 U Boat. 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: