Tools & Wizards About Us
divingheritage.com screenshot

Report Summary

  • 85

    Performance

    Renders faster than
    88% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 33

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

divingheritage.com

DivingHeritage - the worlds largest virtual diving helmet museum

Page Load Speed

2.7 sec in total

First Response

284 ms

Resources Loaded

2.3 sec

Page Rendered

117 ms

divingheritage.com screenshot

About Website

Click here to check amazing Diving Heritage content for United Kingdom. Otherwise, check out these important facts you probably never knew about divingheritage.com

DivingHeritage brings a tribute to all involved in the development of professional diving. The diving helmet museum has over 500 diving helmets and much more on display!

Visit divingheritage.com

Key Findings

We analyzed Divingheritage.com page load time and found that the first response time was 284 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

divingheritage.com performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

81/100

25%

SI (Speed Index)

Value3.9 s

83/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.135

80/100

15%

TTI (Time to Interactive)

Value3.3 s

93/100

10%

Network Requests Diagram

divingheritage.com

284 ms

www.divingheritage.com

568 ms

jquery.js

261 ms

brand

8 ms

brandjs.js

17 ms

Our browser made a total of 52 requests to load all elements on the main page. We found that 87% of them (45 requests) were addressed to the original Divingheritage.com, 4% (2 requests) were made to Google.com and 4% (2 requests) were made to Military.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Divingheritage.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 18.3 kB (56%)

Content Size

32.6 kB

After Optimization

14.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Divingheritage.com main page is 32.6 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. HTML takes 23.4 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 18.2 kB

  • Original 23.4 kB
  • After minification 22.1 kB
  • After compression 5.2 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 18.2 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 3.3 kB
  • After minification 3.3 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. Diving Heritage images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 140 B

  • Original 5.9 kB
  • After minification 5.9 kB
  • After compression 5.7 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. This website has mostly compressed JavaScripts.

Requests Breakdown

We found no issues to fix!

Requests Now

46

After Optimization

46

  • AJAX
  • Images
  • JavaScript

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Diving Heritage. According to our analytics all requests are already optimized.

Network Requests Diagram

divingheritage.com

divingheritage.com

284 ms

www.divingheritage.com

www.divingheritage.com

568 ms

jquery.js

jquery.js

261 ms

brand

brand

8 ms

brandjs.js

brandjs.js

17 ms

3.js

3.js

127 ms

badge_medal_navy.gif

badge_medal_navy.gif

145 ms

1stdiver.gif

1stdiver.gif

82 ms

header-bg.jpg

header-bg.jpg

164 ms

indexk3.gif

indexk3.gif

167 ms

indexk1.gif

indexk1.gif

246 ms

indexk6.gif

indexk6.gif

250 ms

indexk7.gif

indexk7.gif

322 ms

indexk4.gif

indexk4.gif

330 ms

aboutknop.gif

aboutknop.gif

325 ms

links1.gif

links1.gif

330 ms

bottlemail.gif

bottlemail.gif

333 ms

20000-Divers-under_small.jpg

20000-Divers-under_small.jpg

571 ms

H-Rcolour-Burchett.jpg

H-Rcolour-Burchett.jpg

562 ms

friedrich-flohr-1.jpg

friedrich-flohr-1.jpg

565 ms

Unknown-Brazilian-Helmet-1.jpg

Unknown-Brazilian-Helmet-1.jpg

722 ms

DiverTelephone-Drager_Draegerwerke-Lubeck-1.jpg

DiverTelephone-Drager_Draegerwerke-Lubeck-1.jpg

570 ms

Italy_salvas1.jpg

Italy_salvas1.jpg

497 ms

ch-petit1.jpg

ch-petit1.jpg

659 ms

JohnDate-IMG_0439.jpg

JohnDate-IMG_0439.jpg

940 ms

SiebeGormanFlange-small.jpg

SiebeGormanFlange-small.jpg

675 ms

NemrodSpain-laFoto_hompage-roller.jpg

NemrodSpain-laFoto_hompage-roller.jpg

752 ms

Choa-JapHelmet_lips068.jpg

Choa-JapHelmet_lips068.jpg

908 ms

helmet-tee-wrench2-preview.jpg

helmet-tee-wrench2-preview.jpg

865 ms

helmet-tee-wrench5-preview.jpg

helmet-tee-wrench5-preview.jpg

761 ms

equipment_PossiblyDREAGER3-preview.jpg

equipment_PossiblyDREAGER3-preview.jpg

908 ms

FisheriesHelmet_helmet6.jpg

FisheriesHelmet_helmet6.jpg

988 ms

Wojtusiak-Adriatic%20%201937%20(Split).jpg

Wojtusiak-Adriatic%20%201937%20(Split).jpg

879 ms

John%20Date%20dive%20helmet%20015.jpg

John%20Date%20dive%20helmet%20015.jpg

955 ms

siebe3bout-IMG_0076.jpg

siebe3bout-IMG_0076.jpg

972 ms

experiment_0439.jpg

experiment_0439.jpg

1109 ms

Siebe%20Gorman%206%20bolt-4.JPG

Siebe%20Gorman%206%20bolt-4.JPG

1034 ms

Siebe%20Gorman%206%20bolt-3.jpg

Siebe%20Gorman%206%20bolt-3.jpg

1048 ms

Craftsweld_IMG_0408.JPG

Craftsweld_IMG_0408.JPG

1095 ms

vinceknives%20002.jpg

vinceknives%20002.jpg

1064 ms

SiebeGormanNoBolt_0261.JPG

SiebeGormanNoBolt_0261.JPG

1097 ms

IMG_0368.JPG

IMG_0368.JPG

1142 ms

updates_log-2017.htm

updates_log-2017.htm

1119 ms

branding.png

branding.png

19 ms

x-click-butcc-donate.gif

x-click-butcc-donate.gif

13 ms

IMG_0377.JPG

IMG_0377.JPG

1077 ms

badge_medal_navy.gif

badge_medal_navy.gif

319 ms

homepage_image.jpg

homepage_image.jpg

1028 ms

index.1.gif

index.1.gif

1016 ms

souvenirbanner.gif

souvenirbanner.gif

949 ms

webaward2003.jpg

webaward2003.jpg

968 ms

hdslogo.jpg

hdslogo.jpg

921 ms

Accessibility Review

divingheritage.com accessibility score

52

Accessibility Issues

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

divingheritage.com best practices score

33

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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

divingheritage.com SEO score

67

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    WINDOWS-1252

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

divingheritage.com

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