5.1 sec in total
650 ms
3.2 sec
1.2 sec
Click here to check amazing Retsu content. Otherwise, check out these important facts you probably never knew about retsu.co.jp
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Visit retsu.co.jpWe analyzed Retsu.co.jp page load time and found that the first response time was 650 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
retsu.co.jp performance score
name
value
score
weighting
Value3.7 s
29/100
10%
Value7.4 s
4/100
25%
Value13.2 s
2/100
10%
Value5,320 ms
0/100
30%
Value0
100/100
15%
Value24.7 s
0/100
10%
650 ms
1614 ms
306 ms
751 ms
473 ms
Our browser made a total of 69 requests to load all elements on the main page. We found that 55% of them (38 requests) were addressed to the original Retsu.co.jp, 20% (14 requests) were made to Static.xx.fbcdn.net and 6% (4 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain Retsu.co.jp.
Page size can be reduced by 453.3 kB (32%)
1.4 MB
963.0 kB
In fact, the total size of Retsu.co.jp main page is 1.4 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. 45% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.
Potential reduce by 40.6 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 40.6 kB or 77% of the original size.
Potential reduce by 412.7 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, Retsu needs image optimization as it can save up to 412.7 kB or 31% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 34 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.
Number of requests can be reduced by 15 (26%)
58
43
The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Retsu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
retsu.co.jp
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retsu.co.jp accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
retsu.co.jp best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
retsu.co.jp SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
EUC-JP
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Retsu.co.jp 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 Retsu.co.jp main page’s claimed encoding is euc-jp. 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.
retsu.co.jp
Open Graph description is not detected on the main page of Retsu. 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: