Tools & Wizards About Us
javascuba.com screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    42% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 54

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

javascuba.com

Dive Center Jakarta | Dive Course Indonesia | Scuba Diving Indonesia

Page Load Speed

15.5 sec in total

First Response

3 sec

Resources Loaded

12.2 sec

Page Rendered

242 ms

javascuba.com screenshot

About Website

Visit javascuba.com now to see the best up-to-date Java Scuba 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 3 sec and then it took 12.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

javascuba.com performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

5/100

10%

LCP (Largest Contentful Paint)

Value26.4 s

0/100

25%

SI (Speed Index)

Value13.3 s

2/100

10%

TBT (Total Blocking Time)

Value1,090 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0.018

100/100

15%

TTI (Time to Interactive)

Value18.0 s

4/100

10%

Network Requests Diagram

javascuba.com

2995 ms

bootstrap.css

2024 ms

stylesheet.css

2392 ms

css

26 ms

carousel.css

1027 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 72% of them (46 requests) were addressed to the original Javascuba.com, 11% (7 requests) were made to Fonts.gstatic.com and 6% (4 requests) were made to Opi.yahoo.com. The less responsive or slowest element that took the longest time to load (5.6 sec) belongs to the original domain Javascuba.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 899.7 kB (54%)

Content Size

1.7 MB

After Optimization

775.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Javascuba.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. 65% of websites need less resources to load. Javascripts take 592.9 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 29.5 kB

  • Original 34.9 kB
  • After minification 32.4 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. 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 29.5 kB or 85% of the original size.

Image Optimization

-6%

Potential reduce by 29.6 kB

  • Original 535.5 kB
  • After minification 505.9 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. Java Scuba images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 411.5 kB

  • Original 592.9 kB
  • After minification 582.0 kB
  • After compression 181.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 411.5 kB or 69% of the original size.

CSS Optimization

-84%

Potential reduce by 429.0 kB

  • Original 511.4 kB
  • After minification 463.2 kB
  • After compression 82.4 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 needs all CSS files to be minified and compressed as it can save up to 429.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (43%)

Requests Now

56

After Optimization

32

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Java Scuba. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

javascuba.com

javascuba.com

2995 ms

bootstrap.css

bootstrap.css

2024 ms

stylesheet.css

stylesheet.css

2392 ms

css

css

26 ms

carousel.css

carousel.css

1027 ms

slideshow.css

slideshow.css

1027 ms

pavmegamenu.css

pavmegamenu.css

1031 ms

colorbox.css

colorbox.css

1277 ms

jquery-ui-1.8.16.custom.css

jquery-ui-1.8.16.custom.css

1865 ms

font-awesome.min.css

font-awesome.min.css

1862 ms

bootstrap-responsive.css

bootstrap-responsive.css

1606 ms

theme-responsive.css

theme-responsive.css

2137 ms

jquery-1.7.1.min.js

jquery-1.7.1.min.js

2963 ms

jquery-ui-1.8.16.custom.min.js

jquery-ui-1.8.16.custom.min.js

3701 ms

jquery.cookie.js

jquery.cookie.js

2456 ms

common.js

common.js

2665 ms

common.js

common.js

2654 ms

bootstrap.min.js

bootstrap.min.js

3157 ms

jquery.jcarousel.min.js

jquery.jcarousel.min.js

2979 ms

jquery.nivo.slider.pack.js

jquery.nivo.slider.pack.js

3159 ms

jquery.colorbox-min.js

jquery.colorbox-min.js

3227 ms

tabs.js

tabs.js

3474 ms

online

online

126 ms

online

online

126 ms

online

online

127 ms

online

online

127 ms

metal.jpg

metal.jpg

433 ms

logo%20java.png

logo%20java.png

564 ms

icon-search.png

icon-search.png

587 ms

loading.gif

loading.gif

587 ms

-%20(7)-1100x350.jpg

-%20(7)-1100x350.jpg

2157 ms

lavacore-elite-thermal-range-1100x350.jpg

lavacore-elite-thermal-range-1100x350.jpg

1379 ms

lavacore-1100x350.jpg

lavacore-1100x350.jpg

3059 ms

lavacore1-1100x350.jpg

lavacore1-1100x350.jpg

2602 ms

7-1100x350.jpg

7-1100x350.jpg

2572 ms

Tusa-1100x350.jpg

Tusa-1100x350.jpg

2397 ms

10-1100x350.jpg

10-1100x350.jpg

2979 ms

1.BANNER_3_OK.jpg-1100x350.jpg

1.BANNER_3_OK.jpg-1100x350.jpg

4653 ms

1(1)-1100x350.jpg

1(1)-1100x350.jpg

4334 ms

1.BANNER_10_OK.jpg-1100x350.jpg

1.BANNER_10_OK.jpg-1100x350.jpg

4875 ms

Shop.png

Shop.png

4006 ms

Edi.png

Edi.png

4636 ms

experience.png

experience.png

4767 ms

2.jpg

2.jpg

4845 ms

SSI-logo-200x120.png

SSI-logo-200x120.png

5232 ms

PADI_LOGObest-200x120.png

PADI_LOGObest-200x120.png

5232 ms

RAID-200x120.jpg

RAID-200x120.jpg

5234 ms

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

99 ms

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DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

100 ms

MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf

MTP_ySUJH_bn48VBG8sNSonF5uFdDttMLvmWuJdhhgs.ttf

100 ms

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100 ms

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EInbV5DfGHOiMmvb1Xr-honF5uFdDttMLvmWuJdhhgs.ttf

98 ms

gvokzucGM10

gvokzucGM10

119 ms

button-previous.png

button-previous.png

5171 ms

button-next.png

button-next.png

5331 ms

arrows.png

arrows.png

5339 ms

bullets.png

bullets.png

5621 ms

www-embed-player-vflfNyN_r.css

www-embed-player-vflfNyN_r.css

43 ms

www-embed-player.js

www-embed-player.js

74 ms

base.js

base.js

113 ms

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js

55 ms

ad_status.js

ad_status.js

50 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

51 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

52 ms

Accessibility Review

javascuba.com accessibility score

87

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

javascuba.com best practices score

54

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

High

Serves images with low resolution

General

Impact

Issue

High

Registers an unload listener

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

javascuba.com 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

    EUC-KR

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 euc-kr. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

javascuba.com

Open Graph description is not detected on the main page of Java Scuba. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: