Tools & Wizards About Us
scdc.org.hk screenshot

Report Summary

  • 53

    Performance

    Renders faster than
    70% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

scdc.org.hk

South China Diving Club (SCDC), Scuba Diving in Hong Kong

Page Load Speed

4.1 sec in total

First Response

1 sec

Resources Loaded

3.1 sec

Page Rendered

55 ms

scdc.org.hk screenshot

About Website

Click here to check amazing SCDC content. Otherwise, check out these important facts you probably never knew about scdc.org.hk

SCDC is a club dedicated to promoting diving in Hong Kong. Hong Kong Diving Club. Advanced Courses

Visit scdc.org.hk

Key Findings

We analyzed Scdc.org.hk page load time and found that the first response time was 1 sec and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

scdc.org.hk performance score

53

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value3.9 s

83/100

10%

TBT (Total Blocking Time)

Value310 ms

78/100

30%

CLS (Cumulative Layout Shift)

Value0.023

100/100

15%

TTI (Time to Interactive)

Value12.5 s

14/100

10%

Network Requests Diagram

www.scdc.org.hk

1012 ms

minified.js

35 ms

focus-within-polyfill.js

34 ms

polyfill.min.js

1020 ms

thunderbolt-commons.81e79c4a.bundle.min.js

46 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Scdc.org.hk, 44% (18 requests) were made to Static.parastorage.com and 29% (12 requests) were made to Static.wixstatic.com. The less responsive or slowest element that took the longest time to load (1 sec) relates to the external source Polyfill-fastly.io.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (63%)

Content Size

1.7 MB

After Optimization

630.4 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Scdc.org.hk 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. 35% of websites need less resources to load. HTML takes 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 1.0 MB

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 253.0 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 1.0 MB or 81% of the original size.

Image Optimization

-2%

Potential reduce by 2.8 kB

  • Original 139.6 kB
  • After minification 136.8 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. SCDC images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 4.2 kB

  • Original 244.9 kB
  • After minification 244.8 kB
  • After compression 240.6 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

Number of requests can be reduced by 10 (36%)

Requests Now

28

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SCDC. 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

www.scdc.org.hk

www.scdc.org.hk

1012 ms

minified.js

minified.js

35 ms

focus-within-polyfill.js

focus-within-polyfill.js

34 ms

polyfill.min.js

polyfill.min.js

1020 ms

thunderbolt-commons.81e79c4a.bundle.min.js

thunderbolt-commons.81e79c4a.bundle.min.js

46 ms

main.e8bb44c8.bundle.min.js

main.e8bb44c8.bundle.min.js

46 ms

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

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

44 ms

lodash.min.js

lodash.min.js

45 ms

react.production.min.js

react.production.min.js

47 ms

react-dom.production.min.js

react-dom.production.min.js

50 ms

siteTags.bundle.min.js

siteTags.bundle.min.js

50 ms

c79f09_d166ed548928436186136ce2fe67a5f3~mv2.jpg

c79f09_d166ed548928436186136ce2fe67a5f3~mv2.jpg

132 ms

maxresdefault.jpg

maxresdefault.jpg

322 ms

Final%20logo%20only%20graphics.png

Final%20logo%20only%20graphics.png

159 ms

c79f09_16efe98b0d06433f81724edb18b89d69~mv2.jpg

c79f09_16efe98b0d06433f81724edb18b89d69~mv2.jpg

162 ms

c79f09_219e328f7ba64c2c97e3c67a149ce787~mv2_d_2257_1533_s_2.png

c79f09_219e328f7ba64c2c97e3c67a149ce787~mv2_d_2257_1533_s_2.png

162 ms

c79f09_172a36442c7540269ed053c3a2ddcd95~mv2_d_6532_4357_s_4_2.jpg

c79f09_172a36442c7540269ed053c3a2ddcd95~mv2_d_6532_4357_s_4_2.jpg

164 ms

c79f09_1a98ab61867d41aeb39d8a5d565270c5~mv2.jpg

c79f09_1a98ab61867d41aeb39d8a5d565270c5~mv2.jpg

162 ms

c79f09_6793370b1a7f44848034d5e89ddbd250~mv2.webp

c79f09_6793370b1a7f44848034d5e89ddbd250~mv2.webp

164 ms

c79f09_6793370b1a7f44848034d5e89ddbd250~mv2.webp

c79f09_6793370b1a7f44848034d5e89ddbd250~mv2.webp

165 ms

c79f09_829e25a74168434b8936db3682004306~mv2.webp

c79f09_829e25a74168434b8936db3682004306~mv2.webp

167 ms

8d13be_085370ce86524c338368a412847845a9.png

8d13be_085370ce86524c338368a412847845a9.png

165 ms

8d13be_82dce4e0b9d849edbba572b1f7332480.gif

8d13be_82dce4e0b9d849edbba572b1f7332480.gif

163 ms

c79f09_bce07d62bbc247f3ab20dcd0098ad4fd~mv2_d_2257_1533_s_2.png

c79f09_bce07d62bbc247f3ab20dcd0098ad4fd~mv2_d_2257_1533_s_2.png

180 ms

bundle.min.js

bundle.min.js

97 ms

80de9d5d-ab5f-40ce-911b-104e51e93d7c.woff

80de9d5d-ab5f-40ce-911b-104e51e93d7c.woff

24 ms

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

908c4810-64db-4b46-bb8e-823eb41f68c0.woff

22 ms

opensans-regular-webfont.woff

opensans-regular-webfont.woff

43 ms

opensans-bold-webfont.woff

opensans-bold-webfont.woff

43 ms

03805817-4611-4dbc-8c65-0f73031c3973.woff

03805817-4611-4dbc-8c65-0f73031c3973.woff

9 ms

80c34ad2-27c2-4d99-90fa-985fd64ab81a.woff

80c34ad2-27c2-4d99-90fa-985fd64ab81a.woff

24 ms

98 ms

93 ms

95 ms

95 ms

92 ms

90 ms

deprecation-en.v5.html

deprecation-en.v5.html

7 ms

bolt-performance

bolt-performance

23 ms

deprecation-style.v5.css

deprecation-style.v5.css

7 ms

right-arrow.svg

right-arrow.svg

7 ms

Accessibility Review

scdc.org.hk accessibility score

87

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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.

Best Practices

scdc.org.hk 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

scdc.org.hk SEO score

91

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

Links do not have descriptive text

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 Scdc.org.hk 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 Scdc.org.hk 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

scdc.org.hk

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