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nadco.us screenshot

Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

nadco.us

NADCO, Scuba Diving Training, dive trips, equipment, gear, and service. - Dive-Trips-Travel-Training-Sales

Page Load Speed

3.4 sec in total

First Response

831 ms

Resources Loaded

2.2 sec

Page Rendered

335 ms

nadco.us screenshot

About Website

Visit nadco.us now to see the best up-to-date NADCO content and also check out these interesting facts you probably never knew about nadco.us

NADCO, Inc.

Visit nadco.us

Key Findings

We analyzed Nadco.us page load time and found that the first response time was 831 ms and then it took 2.5 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

nadco.us performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

6/100

10%

LCP (Largest Contentful Paint)

Value28.3 s

0/100

25%

SI (Speed Index)

Value17.4 s

0/100

10%

TBT (Total Blocking Time)

Value1,190 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.251

49/100

15%

TTI (Time to Interactive)

Value28.1 s

0/100

10%

Network Requests Diagram

nadco.us

831 ms

css

44 ms

css

59 ms

css

65 ms

css

66 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 66% of them (58 requests) were addressed to the original Nadco.us, 10% (9 requests) were made to Imgds360live.s3.amazonaws.com and 9% (8 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (831 ms) belongs to the original domain Nadco.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 168.0 kB (3%)

Content Size

4.9 MB

After Optimization

4.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Nadco.us main page is 4.9 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. 55% of websites need less resources to load. Images take 4.4 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 56.1 kB

  • Original 69.8 kB
  • After minification 61.6 kB
  • After compression 13.7 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. This page needs HTML code to be minified as it can gain 8.2 kB, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 56.1 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 80.3 kB

  • Original 4.4 MB
  • After minification 4.4 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. NADCO images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 25.3 kB

  • Original 297.7 kB
  • After minification 297.7 kB
  • After compression 272.4 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

-9%

Potential reduce by 6.3 kB

  • Original 70.9 kB
  • After minification 70.9 kB
  • After compression 64.6 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. Nadco.us has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 60 (71%)

Requests Now

84

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 84 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NADCO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 32 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

nadco.us

nadco.us

831 ms

css

css

44 ms

css

css

59 ms

css

css

65 ms

css

css

66 ms

css

css

69 ms

css

css

70 ms

css

css

66 ms

font-awesome.min.css

font-awesome.min.css

66 ms

bootstrap.min.css

bootstrap.min.css

129 ms

owl.carousel.css

owl.carousel.css

192 ms

magnific-popup.css

magnific-popup.css

198 ms

lightbox.css

lightbox.css

205 ms

jquery-ui.min.css

jquery-ui.min.css

202 ms

animate.css

animate.css

200 ms

jquery.multiselect.css

jquery.multiselect.css

200 ms

slick.css

slick.css

252 ms

flexslider.css

flexslider.css

260 ms

jquery-confirm.min.css

jquery-confirm.min.css

263 ms

jquery.rateyo.css

jquery.rateyo.css

262 ms

custom_form_builder.css

custom_form_builder.css

264 ms

jquery.smartmenus.bootstrap.css

jquery.smartmenus.bootstrap.css

264 ms

store-front.css

store-front.css

317 ms

smartnav.css

smartnav.css

332 ms

main.css

main.css

480 ms

media-queries.css

media-queries.css

405 ms

common.css

common.css

340 ms

customStyle.css

customStyle.css

342 ms

common-fixes.css

common-fixes.css

378 ms

theme1.css

theme1.css

402 ms

colors.css

colors.css

411 ms

jquery.min.js

jquery.min.js

474 ms

js

js

76 ms

1680136155.png

1680136155.png

332 ms

owinstructor.jpg

owinstructor.jpg

323 ms

jquery-migrate-3.0.0.min.js

jquery-migrate-3.0.0.min.js

437 ms

bootstrap.js

bootstrap.js

463 ms

jquery-ui.min.js

jquery-ui.min.js

549 ms

owl.carousel.min.js

owl.carousel.min.js

473 ms

lightbox.min.js

lightbox.min.js

508 ms

jquery-validation.min.js

jquery-validation.min.js

549 ms

jquery.isotope.min.js

jquery.isotope.min.js

549 ms

jquery.selectbox-0.2.min.js

jquery.selectbox-0.2.min.js

549 ms

jquery.validate.min.js

jquery.validate.min.js

549 ms

validate.js

validate.js

630 ms

masonry.pkgd.js

masonry.pkgd.js

630 ms

api.js

api.js

37 ms

api.js

api.js

58 ms

advopenwater.jpg

advopenwater.jpg

546 ms

tecinstructor.jpg

tecinstructor.jpg

661 ms

specialty.jpg

specialty.jpg

348 ms

1235204074_1679684369_3545535.jpg

1235204074_1679684369_3545535.jpg

458 ms

6676987528_1680136750_3545535.jpg

6676987528_1680136750_3545535.jpg

546 ms

6619145617_1706302504_3545535.jpg

6619145617_1706302504_3545535.jpg

666 ms

8381451815_1705617322_3545535.jpg

8381451815_1705617322_3545535.jpg

571 ms

1680138808.png

1680138808.png

360 ms

jquery.flexslider-min.js

jquery.flexslider-min.js

627 ms

jquery.magnific-popup.min.js

jquery.magnific-popup.min.js

574 ms

jquery.zoom.min.js

jquery.zoom.min.js

508 ms

slick.js

slick.js

450 ms

selectize.min.js

selectize.min.js

471 ms

bootstrap-notify.js

bootstrap-notify.js

469 ms

jquery-confirm.min.js

jquery-confirm.min.js

471 ms

js.cookie.js

js.cookie.js

471 ms

jquery.smartmenus.min.js

jquery.smartmenus.min.js

471 ms

jquery.smartmenus.bootstrap.min.js

jquery.smartmenus.bootstrap.min.js

424 ms

custom_form_validate.js

custom_form_validate.js

450 ms

dive-custom.js

dive-custom.js

468 ms

cart.js

cart.js

476 ms

jquery.rateyo.js

jquery.rateyo.js

474 ms

shadow1.png

shadow1.png

519 ms

captcha

captcha

524 ms

captcha

captcha

579 ms

captcha

captcha

645 ms

2_1701471994.jpeg

2_1701471994.jpeg

545 ms

3_1701473155.jpeg

3_1701473155.jpeg

288 ms

4_1687040055.jpeg

4_1687040055.jpeg

230 ms

shadow1.png

shadow1.png

511 ms

font

font

80 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

285 ms

font

font

81 ms

recaptcha__en.js

recaptcha__en.js

56 ms

loading.gif

loading.gif

69 ms

cross_white.png

cross_white.png

359 ms

fallback

fallback

20 ms

fallback__ltr.css

fallback__ltr.css

4 ms

css

css

17 ms

logo_48.png

logo_48.png

4 ms

Accessibility Review

nadco.us accessibility score

83

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.

Best Practices

nadco.us best practices score

67

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

nadco.us SEO score

85

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

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 Nadco.us 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 Nadco.us 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

nadco.us

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