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divessi.com screenshot

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

divessi.com

Explore the underwater world by becoming an SSI certified Scuba Diver

Page Load Speed

5.8 sec in total

First Response

389 ms

Resources Loaded

3.2 sec

Page Rendered

2.3 sec

divessi.com screenshot

About Website

Click here to check amazing Dive SSI content for United States. Otherwise, check out these important facts you probably never knew about divessi.com

For 50 years, SSI has provided high-quality training in Recreational Scuba, Extended Range, Rebreather Diving, Freediving, Swim, and Lifeguard programs.

Visit divessi.com

Key Findings

We analyzed Divessi.com page load time and found that the first response time was 389 ms and then it took 5.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

divessi.com performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value16.4 s

0/100

25%

SI (Speed Index)

Value9.2 s

13/100

10%

TBT (Total Blocking Time)

Value1,500 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.02

100/100

15%

TTI (Time to Interactive)

Value17.2 s

4/100

10%

Network Requests Diagram

home

389 ms

website.css

182 ms

image-gallery.css

277 ms

advanced-stats.css

277 ms

website-mobile.css

278 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 25% of them (19 requests) were addressed to the original Divessi.com, 56% (43 requests) were made to My.divessi.com and 4% (3 requests) were made to Use.fontawesome.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source My.divessi.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 96.2 kB (5%)

Content Size

2.0 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Divessi.com main page is 2.0 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. 60% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 62.1 kB

  • Original 81.3 kB
  • After minification 80.5 kB
  • After compression 19.2 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 62.1 kB or 76% of the original size.

Image Optimization

-2%

Potential reduce by 24.3 kB

  • Original 1.2 MB
  • After minification 1.1 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. Dive SSI images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 740 B

  • Original 589.4 kB
  • After minification 589.4 kB
  • After compression 588.7 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.

CSS Optimization

-6%

Potential reduce by 9.1 kB

  • Original 141.2 kB
  • After minification 141.2 kB
  • After compression 132.2 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. Divessi.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 22 (32%)

Requests Now

69

After Optimization

47

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 69 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Dive SSI. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

home

home

389 ms

website.css

website.css

182 ms

image-gallery.css

image-gallery.css

277 ms

advanced-stats.css

advanced-stats.css

277 ms

website-mobile.css

website-mobile.css

278 ms

cropper.css

cropper.css

279 ms

website.css

website.css

469 ms

website-rtl.css

website-rtl.css

279 ms

all.css

all.css

40 ms

line-awesome.min.css

line-awesome.min.css

369 ms

js

js

72 ms

markerclusterer.js

markerclusterer.js

457 ms

js

js

108 ms

banner.js

banner.js

47 ms

17fb6756aa40b6046ceb8905a11146da

17fb6756aa40b6046ceb8905a11146da

308 ms

modelproperties.php

modelproperties.php

267 ms

RenderHelper.js

RenderHelper.js

720 ms

ssi.js

ssi.js

266 ms

TX.js

TX.js

349 ms

jbxmw3pn92

jbxmw3pn92

88 ms

ssi-logo.png

ssi-logo.png

499 ms

400

400

618 ms

400

400

617 ms

400

400

620 ms

Center.svg

Center.svg

525 ms

Dive_Site.svg

Dive_Site.svg

523 ms

pro.png

pro.png

586 ms

400

400

709 ms

400

400

708 ms

400

400

773 ms

600

600

712 ms

SSI_LOGO_MyDiveGuide_Black.png

SSI_LOGO_MyDiveGuide_Black.png

888 ms

img.php

img.php

807 ms

small

small

802 ms

small

small

804 ms

img.php

img.php

809 ms

img.php

img.php

959 ms

img.php

img.php

987 ms

img.php

img.php

901 ms

img.php

img.php

905 ms

small

small

902 ms

400

400

983 ms

400

400

996 ms

400

400

997 ms

400

400

1000 ms

400

400

1053 ms

400

400

1078 ms

400

400

1083 ms

400

400

1091 ms

facebook-lightgrey.svg

facebook-lightgrey.svg

1086 ms

twitter-lightgrey.svg

twitter-lightgrey.svg

1091 ms

instagram-lightgrey.svg

instagram-lightgrey.svg

1142 ms

youtube-lightgrey.svg

youtube-lightgrey.svg

1167 ms

linkedin-lightgrey.svg

linkedin-lightgrey.svg

1172 ms

ssi-logo-lightgrey.svg

ssi-logo-lightgrey.svg

1176 ms

fa-solid-900.woff

fa-solid-900.woff

27 ms

fa-regular-400.woff

fa-regular-400.woff

50 ms

600

600

1249 ms

MyriadPro-Regular.otf

MyriadPro-Regular.otf

287 ms

EurostileNextLTPro-SmBd.otf

EurostileNextLTPro-SmBd.otf

286 ms

MyriadPro-Cond.otf

MyriadPro-Cond.otf

281 ms

la-solid-900.woff

la-solid-900.woff

193 ms

la-regular-400.woff

la-regular-400.woff

185 ms

embed-grid.js

embed-grid.js

22 ms

clarity.js

clarity.js

14 ms

scarab-v2.js

scarab-v2.js

25 ms

293 ms

wploader.js

wploader.js

67 ms

wpes5.js

wpes5.js

4 ms

600

600

698 ms

600

600

720 ms

600

600

747 ms

600

600

781 ms

600

600

664 ms

600

600

679 ms

600

600

815 ms

c.gif

c.gif

8 ms

Accessibility Review

divessi.com accessibility score

81

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.

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

Image elements do not have [alt] attributes

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

divessi.com best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

divessi.com SEO score

92

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

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

divessi.com

Open Graph data is detected on the main page of Dive SSI. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: