Tools & Wizards About Us
divecdi.com screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    45% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

divecdi.com

Commercial Divers International

Page Load Speed

2.9 sec in total

First Response

168 ms

Resources Loaded

2.7 sec

Page Rendered

70 ms

divecdi.com screenshot

About Website

Welcome to divecdi.com homepage info - get ready to check Divecdi best content right away, or after learning these important things about divecdi.com

Commercial diving career training- gain invaluable skills to get your career as a commercial underwater welder started today.

Visit divecdi.com

Key Findings

We analyzed Divecdi.com page load time and found that the first response time was 168 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

divecdi.com performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

17/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

3/100

25%

SI (Speed Index)

Value7.3 s

28/100

10%

TBT (Total Blocking Time)

Value1,270 ms

19/100

30%

CLS (Cumulative Layout Shift)

Value0.038

100/100

15%

TTI (Time to Interactive)

Value16.3 s

5/100

10%

Network Requests Diagram

divecdi.com

168 ms

divecdi.com

233 ms

www.commercialdiversinternational.edu

1144 ms

minified.js

46 ms

focus-within-polyfill.js

41 ms

Our browser made a total of 52 requests to load all elements on the main page. We found that 4% of them (2 requests) were addressed to the original Divecdi.com, 37% (19 requests) were made to Static.wixstatic.com and 29% (15 requests) were made to Static.parastorage.com. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Commercialdiversinternational.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (63%)

Content Size

1.7 MB

After Optimization

613.1 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Divecdi.com main page is 1.7 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. 30% of websites need less resources to load. HTML takes 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 941.7 kB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 233.2 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 941.7 kB or 80% of the original size.

Image Optimization

-26%

Potential reduce by 48.3 kB

  • Original 187.5 kB
  • After minification 139.2 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. Obviously, Divecdi needs image optimization as it can save up to 48.3 kB or 26% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-17%

Potential reduce by 48.1 kB

  • Original 288.8 kB
  • After minification 288.8 kB
  • After compression 240.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 48.1 kB or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (31%)

Requests Now

32

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Divecdi. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

divecdi.com

divecdi.com

168 ms

divecdi.com

divecdi.com

233 ms

www.commercialdiversinternational.edu

www.commercialdiversinternational.edu

1144 ms

minified.js

minified.js

46 ms

focus-within-polyfill.js

focus-within-polyfill.js

41 ms

polyfill.min.js

polyfill.min.js

40 ms

thunderbolt-commons.60ed9a5a.bundle.min.js

thunderbolt-commons.60ed9a5a.bundle.min.js

140 ms

main.dda15fae.bundle.min.js

main.dda15fae.bundle.min.js

142 ms

main.renderer.1d21f023.bundle.min.js

main.renderer.1d21f023.bundle.min.js

141 ms

lodash.min.js

lodash.min.js

153 ms

react.production.min.js

react.production.min.js

151 ms

react-dom.production.min.js

react-dom.production.min.js

154 ms

siteTags.bundle.min.js

siteTags.bundle.min.js

165 ms

circle-cropped.png

circle-cropped.png

336 ms

bundle.min.js

bundle.min.js

82 ms

7c9538_fdf5858e87dd43318d5fb11b257682a2f000.jpg

7c9538_fdf5858e87dd43318d5fb11b257682a2f000.jpg

376 ms

33924788126_0795751cdb_k.jpg

33924788126_0795751cdb_k.jpg

338 ms

7c9538_5074e6413fd14fc29c2ee47326e5a571~mv2.jpg

7c9538_5074e6413fd14fc29c2ee47326e5a571~mv2.jpg

319 ms

coe-logo.png

coe-logo.png

298 ms

VSC.png

VSC.png

367 ms

osha.png

osha.png

280 ms

ADCILOGO.png

ADCILOGO.png

410 ms

divelab.png

divelab.png

301 ms

kirby-morgan-dive-systems.png

kirby-morgan-dive-systems.png

302 ms

azppse-arizona-seal.png

azppse-arizona-seal.png

468 ms

canadianflag.png

canadianflag.png

469 ms

us-department-of-labor.png

us-department-of-labor.png

504 ms

asnt-american-society-of-non-destructive.png

asnt-american-society-of-non-destructive.png

499 ms

american-welding-society.png

american-welding-society.png

563 ms

dan-divers-alert-network2.png

dan-divers-alert-network2.png

411 ms

MFS18_Silver_100x100.png

MFS18_Silver_100x100.png

413 ms

148 ms

143 ms

144 ms

145 ms

141 ms

141 ms

180 ms

178 ms

177 ms

177 ms

175 ms

174 ms

file.woff

file.woff

247 ms

file.woff

file.woff

255 ms

deprecation-en.v5.html

deprecation-en.v5.html

6 ms

bolt-performance

bolt-performance

25 ms

deprecation-style.v5.css

deprecation-style.v5.css

6 ms

right-arrow.svg

right-arrow.svg

18 ms

WixMadeforDisplay_W_Bd.woff

WixMadeforDisplay_W_Bd.woff

4 ms

WixMadeforText_W_Bd.woff

WixMadeforText_W_Bd.woff

4 ms

WixMadeforText_W_Rg.woff

WixMadeforText_W_Rg.woff

11 ms

Accessibility Review

divecdi.com accessibility score

88

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

Links do not have a discernible name

Best Practices

divecdi.com 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

High

Page has valid source maps

SEO Factors

divecdi.com SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Divecdi.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 Divecdi.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

divecdi.com

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