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javascuba.com screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

javascuba.com

Diving School Jakarta | Dive Center Jakarta | Dive Course Jakarta

Page Load Speed

6.5 sec in total

First Response

801 ms

Resources Loaded

5.6 sec

Page Rendered

140 ms

javascuba.com screenshot

About Website

Visit javascuba.com now to see the best up-to-date Javascuba content for Indonesia and also check out these interesting facts you probably never knew about javascuba.com

JavaScuba is a dive center in Jakarta, Indonesia that co-operate with PADI. Our dive center provides dive course, PADI open water , try scuba diving in our Jakarta dive container, dive trip, shop, equ...

Visit javascuba.com

Key Findings

We analyzed Javascuba.com page load time and found that the first response time was 801 ms and then it took 5.7 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

javascuba.com performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value8.2 s

20/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.06

98/100

15%

TTI (Time to Interactive)

Value3.9 s

89/100

10%

Network Requests Diagram

javascuba.com

801 ms

www.javascuba.com

1402 ms

Slider.js

1071 ms

generic.css

266 ms

page.js

27 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 82% of them (23 requests) were addressed to the original Javascuba.com, 7% (2 requests) were made to Dellindo.com and 7% (2 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Javascuba.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 74.5 kB (21%)

Content Size

355.0 kB

After Optimization

280.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Javascuba.com main page is 355.0 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. 20% of websites need less resources to load. Images take 189.0 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 14.6 kB

  • Original 20.0 kB
  • After minification 17.7 kB
  • After compression 5.4 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 2.3 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 14.6 kB or 73% of the original size.

Image Optimization

-32%

Potential reduce by 59.7 kB

  • Original 189.0 kB
  • After minification 129.3 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. Obviously, Javascuba needs image optimization as it can save up to 59.7 kB or 32% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 143 B

  • Original 120.2 kB
  • After minification 120.1 kB
  • After compression 120.0 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

-0%

Potential reduce by 64 B

  • Original 25.8 kB
  • After minification 25.8 kB
  • After compression 25.8 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. Javascuba.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 4 (17%)

Requests Now

24

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Javascuba. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

javascuba.com

javascuba.com

801 ms

www.javascuba.com

www.javascuba.com

1402 ms

Slider.js

Slider.js

1071 ms

generic.css

generic.css

266 ms

page.js

page.js

27 ms

df001.29.css

df001.29.css

800 ms

df001.29.js

df001.29.js

1283 ms

addthis_widget.js

addthis_widget.js

141 ms

eso.D0Uc7kY6.js

eso.D0Uc7kY6.js

19 ms

whatsapp.png

whatsapp.png

257 ms

javascuba-slider5.webp

javascuba-slider5.webp

1066 ms

javascuba-slider3.webp

javascuba-slider3.webp

1300 ms

javascuba-slider21.webp

javascuba-slider21.webp

776 ms

javascuba-slider2.webp

javascuba-slider2.webp

1526 ms

javascuba-slider6.webp

javascuba-slider6.webp

2082 ms

Cat-Course3.webp

Cat-Course3.webp

1056 ms

Cat-Trip2.webp

Cat-Trip2.webp

1034 ms

Cat-Hydrostatic3.webp

Cat-Hydrostatic3.webp

1293 ms

Cat-Services2.webp

Cat-Services2.webp

1321 ms

Diving-School-Jakarta1.jpg

Diving-School-Jakarta1.jpg

1335 ms

diagonal-banner3.webp

diagonal-banner3.webp

1556 ms

Dive-Trip-Banner1.webp

Dive-Trip-Banner1.webp

1821 ms

img-sosmed-ig-javascuba.png

img-sosmed-ig-javascuba.png

1586 ms

img-sosmed-tiktok-javascuba.png

img-sosmed-tiktok-javascuba.png

1602 ms

img-sosmed-youtube-javascuba.png

img-sosmed-youtube-javascuba.png

1778 ms

java-not-babies.webp

java-not-babies.webp

1813 ms

bubble.png

bubble.png

1827 ms

bebas.ttf

bebas.ttf

1845 ms

Accessibility Review

javascuba.com accessibility score

55

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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

javascuba.com 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

javascuba.com SEO score

86

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

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 Javascuba.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 Javascuba.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

javascuba.com

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