4.6 sec in total
979 ms
2.9 sec
659 ms
Visit kudan-s.com now to see the best up-to-date Kudan S content and also check out these interesting facts you probably never knew about kudan-s.com
東京の数学専門塾。難関校に合格するための数学対策の指導を行っております。塾に通っているのに数学の成績が伸びずに悩んでいる方はぜひ当塾へご相談ください。個別指導、家庭教師の相談も承っております。
Visit kudan-s.comWe analyzed Kudan-s.com page load time and found that the first response time was 979 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
kudan-s.com performance score
name
value
score
weighting
Value3.5 s
34/100
10%
Value4.2 s
45/100
25%
Value6.0 s
46/100
10%
Value150 ms
95/100
30%
Value0.215
58/100
15%
Value5.2 s
74/100
10%
979 ms
508 ms
1045 ms
357 ms
1136 ms
Our browser made a total of 33 requests to load all elements on the main page. We found that 88% of them (29 requests) were addressed to the original Kudan-s.com, 6% (2 requests) were made to Google-analytics.com and 3% (1 request) were made to Assoc-amazon.jp. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Kudan-s.com.
Page size can be reduced by 153.3 kB (34%)
449.9 kB
296.6 kB
In fact, the total size of Kudan-s.com main page is 449.9 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. 35% of websites need less resources to load. Images take 206.1 kB which makes up the majority of the site volume.
Potential reduce by 15.7 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 2.9 kB, which is 13% 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 15.7 kB or 71% of the original size.
Potential reduce by 415 B
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. Kudan S images are well optimized though.
Potential reduce by 121.5 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 121.5 kB or 60% of the original size.
Potential reduce by 15.8 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. Kudan-s.com needs all CSS files to be minified and compressed as it can save up to 15.8 kB or 83% of the original size.
Number of requests can be reduced by 9 (28%)
32
23
The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kudan S. 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.
kudan-s.com
979 ms
common.css
508 ms
jquery.js
1045 ms
common.js
357 ms
jquery-1.4.3.min.js
1136 ms
jquery.fancybox-1.3.4.pack.js
765 ms
jquery.fancybox-1.3.4.css
712 ms
ga.js
5 ms
__utm.gif
10 ms
ir
344 ms
bg_contents_left.gif
193 ms
bg_contents_right.gif
182 ms
logo_24.gif
171 ms
pr.gif
191 ms
bg_menu.gif
193 ms
top_new.gif
177 ms
i_fig_1.gif
506 ms
i_fig_2.gif
352 ms
UWC.jpg
358 ms
book_0610.jpg
379 ms
ntv.jpg
382 ms
Kokugakuin.jpg
954 ms
u-tokyo.jpg
525 ms
suken_3.JPG
712 ms
sme_20130519.jpg
759 ms
suken1.jpg
1143 ms
trial_lesson.gif
675 ms
r-trial-lesson.gif
697 ms
building_side.jpg
843 ms
form_btn_2.gif
871 ms
suken_2.JPG
1067 ms
suken_4.JPG
947 ms
41FzbVw9a7L._SL160_.jpg
22 ms
kudan-s.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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
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
kudan-s.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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
kudan-s.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Image elements do not have [alt] attributes
JA
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kudan-s.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 Kudan-s.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.
kudan-s.com
Open Graph description is not detected on the main page of Kudan S. 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: