11.2 sec in total
740 ms
9.9 sec
543 ms
Welcome to diver-online.com homepage info - get ready to check Diver Online best content for Taiwan right away, or after learning these important things about diver-online.com
ダイビングのすべてがわかる日本最大級のダイビングポータルサイト、ダイバーオンライン。初心者からベテランダイバーまで、ダイビングスポットやショップ情報など幅広くお届けします。またショップ情報や各種ツアーの予約も承っております。
Visit diver-online.comWe analyzed Diver-online.com page load time and found that the first response time was 740 ms and then it took 10.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.
diver-online.com performance score
name
value
score
weighting
Value7.1 s
1/100
10%
Value10.5 s
0/100
25%
Value12.9 s
2/100
10%
Value270 ms
82/100
30%
Value0.018
100/100
15%
Value11.0 s
21/100
10%
740 ms
4294 ms
26 ms
1520 ms
939 ms
Our browser made a total of 109 requests to load all elements on the main page. We found that 50% of them (55 requests) were addressed to the original Diver-online.com, 15% (16 requests) were made to Static.xx.fbcdn.net and 9% (10 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (4.3 sec) belongs to the original domain Diver-online.com.
Page size can be reduced by 1.2 MB (29%)
4.1 MB
2.9 MB
In fact, the total size of Diver-online.com main page is 4.1 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. Images take 3.6 MB which makes up the majority of the site volume.
Potential reduce by 60.9 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 9.8 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 60.9 kB or 77% of the original size.
Potential reduce by 872.2 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, Diver Online needs image optimization as it can save up to 872.2 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 132.7 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 132.7 kB or 57% of the original size.
Potential reduce by 102.6 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. Diver-online.com needs all CSS files to be minified and compressed as it can save up to 102.6 kB or 86% of the original size.
Number of requests can be reduced by 31 (30%)
104
73
The browser has sent 104 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Diver Online. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
diver-online.com
740 ms
www.diver-online.com
4294 ms
jquery-ui.css
26 ms
style.css
1520 ms
script.js
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ga.js
20 ms
jquery-ui.js
51 ms
sdk.js
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logo.png
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header_btn_facebook.png
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header_btn_blog.png
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header_btn_diver.png
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transparent.gif
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diveronline_map.jpg
2831 ms
purpose.jpg
2843 ms
3138 ms
login_with_facebook.gif
2977 ms
login_with_twitter.gif
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cse.js
192 ms
cse.js
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ga.js
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analytics.js
47 ms
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xd_arbiter.php
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page.php
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jsapi
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logo.png
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collect
64 ms
default+ja.css
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default.css
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default+ja.I.js
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default.css
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async-ads.js
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google_custom_search_watermark.gif
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small-logo.png
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search_box_icon.png
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clear.png
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nav_logo114.png
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safe_image.php
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submenu.png
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arrow_down1.png
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ui-bg_flat_75_ffffff_40x100.png
3 ms
diver-online.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
Image elements do not have [alt] attributes
Links do not have a discernible name
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
List items (<li>) are not contained within <ul> or <ol> parent elements.
diver-online.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
diver-online.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
Document uses legible font sizes
JA
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Diver-online.com can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that Diver-online.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.
diver-online.com
Open Graph description is not detected on the main page of Diver Online. 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: