2.9 sec in total
821 ms
1.8 sec
268 ms
Welcome to diving-gas.org homepage info - get ready to check Diving Gas best content right away, or after learning these important things about diving-gas.org
スクーバダイビングの高圧ガス保安啓蒙,技術基準、法令などの解説。アルミ、スチールタンクの自主検査方法,スクーバタンク安全管理のあり方等
Visit diving-gas.orgWe analyzed Diving-gas.org page load time and found that the first response time was 821 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.
diving-gas.org performance score
name
value
score
weighting
Value1.7 s
91/100
10%
Value2.8 s
83/100
25%
Value2.2 s
99/100
10%
Value0 ms
100/100
30%
Value0.032
100/100
15%
Value2.8 s
97/100
10%
821 ms
353 ms
21 ms
468 ms
263 ms
Our browser made a total of 32 requests to load all elements on the main page. We found that 69% of them (22 requests) were addressed to the original Diving-gas.org, 25% (8 requests) were made to Google.com and 6% (2 requests) were made to Cse.google.com. The less responsive or slowest element that took the longest time to load (821 ms) belongs to the original domain Diving-gas.org.
Page size can be reduced by 32.9 kB (20%)
166.6 kB
133.8 kB
In fact, the total size of Diving-gas.org main page is 166.6 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. 30% of websites need less resources to load. Images take 74.5 kB which makes up the majority of the site volume.
Potential reduce by 18.1 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 18.1 kB or 69% of the original size.
Potential reduce by 2.6 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. Diving Gas images are well optimized though.
Potential reduce by 144 B
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.
Potential reduce by 12.0 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. Diving-gas.org needs all CSS files to be minified and compressed as it can save up to 12.0 kB or 83% of the original size.
Number of requests can be reduced by 3 (10%)
30
27
The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Diving Gas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.
diving-gas.org
821 ms
dg01.css
353 ms
jsapi
21 ms
top05.jpg
468 ms
cap_banner01.gif
263 ms
caution.gif
341 ms
topics01.gif
338 ms
dbs2012.jpg
342 ms
oki111116.jpg
343 ms
JAUS110830.jpg
345 ms
db2011-01.jpg
504 ms
101104-safediving.jpg
504 ms
mdf2010-01.jpg
511 ms
df2010-01.jpg
514 ms
1106well-known_example-h100.jpg
514 ms
valvetop01-w100.gif
620 ms
masuda-w72.jpg
670 ms
tankcutmodele2-h100.gif
672 ms
New01.gif
680 ms
Luxfer_book%20160311-w100.gif
685 ms
Silicon-grease2-h100.gif
685 ms
adapter.gif
774 ms
14 ms
default+ja.css
9 ms
minimalist.css
23 ms
default+ja.I.js
26 ms
minimalist.css
48 ms
news1.html
666 ms
async-ads.js
79 ms
google_custom_search_watermark.gif
74 ms
small-logo.png
34 ms
clear.gif
35 ms
diving-gas.org 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
<frame> or <iframe> elements do not have a title
Links do not have a discernible name
diving-gas.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
diving-gas.org 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
JA
JA
SHIFT_JIS
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Diving-gas.org 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 Diving-gas.org main page’s claimed encoding is shift_jis. 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.
diving-gas.org
Open Graph description is not detected on the main page of Diving Gas. 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: