8.4 sec in total
524 ms
7.6 sec
262 ms
Click here to check amazing D Collections Lib Keio content for Japan. Otherwise, check out these important facts you probably never knew about dcollections.lib.keio.ac.jp
慶應義塾大学メディアセンターデジタルコレクション (Keio D Collections) は、慶應義塾大学メディアセンターが所蔵する貴重資料や特殊コレクションを公開するサイトです。 電子化されたコレクション資料には、解説と目録を付しています。特に記載がないものは、三田メディアセンターが所蔵するコレクションです。
Visit dcollections.lib.keio.ac.jpWe analyzed Dcollections.lib.keio.ac.jp page load time and found that the first response time was 524 ms and then it took 7.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.
dcollections.lib.keio.ac.jp performance score
name
value
score
weighting
Value3.9 s
25/100
10%
Value4.7 s
33/100
25%
Value9.7 s
11/100
10%
Value10 ms
100/100
30%
Value0.105
88/100
15%
Value5.7 s
68/100
10%
524 ms
1160 ms
496 ms
497 ms
497 ms
Our browser made a total of 35 requests to load all elements on the main page. We found that all of those requests were addressed to Dcollections.lib.keio.ac.jp and no external sources were called. The less responsive or slowest element that took the longest time to load (4 sec) belongs to the original domain Dcollections.lib.keio.ac.jp.
Page size can be reduced by 143.0 kB (5%)
2.8 MB
2.7 MB
In fact, the total size of Dcollections.lib.keio.ac.jp main page is 2.8 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. 35% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.
Potential reduce by 26.1 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. This page needs HTML code to be minified as it can gain 5.6 kB, which is 18% 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 26.1 kB or 82% of the original size.
Potential reduce by 103.2 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. D Collections Lib Keio images are well optimized though.
Potential reduce by 13.6 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 13.6 kB or 16% of the original size.
Potential reduce by 83 B
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. Dcollections.lib.keio.ac.jp has all CSS files already compressed.
Number of requests can be reduced by 9 (27%)
33
24
The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of D Collections Lib Keio. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
dcollections.lib.keio.ac.jp
524 ms
ja
1160 ms
css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css
496 ms
css_y5V-74fl2u3TPnO7Vzl0srF2_LEAmcANj4_-6qPJyxk.css
497 ms
css_YmuMqUm--85MDg6GF8xFt60xnxOSYeKArfr5yk0-sVc.css
497 ms
css_cw1b1kWU8aZDrz9DZWww1_TFHba3lJirdHB0do0GcN8.css
512 ms
css_zKvAAbvxo1_uaLH8tnMhKbE5BbtqDllzB8d8FWxeJPc.css
683 ms
js_s5koNMBdK4BqfHyHNPWCXIL2zD0jFcPyejDZsryApj0.js
878 ms
js_9zIIFQiCD8pZrA151Tot9ewRJQxqRzBMZQIabkgsEbk.js
992 ms
js_D513xrHxkFzR3xMs-U1B-okOiPuXCy6MX1kwfrKN5Ls.js
1008 ms
js_GFJ5HOZCW03xLrFJqVqVKm_nCgojB8I7wud9IryCSSs.js
1022 ms
js_zWSclLS0DOxzDQ9bttaghvuwtV_X86DTdkcxieTZQL4.js
1020 ms
js_MRdvkC2u4oGsp5wVxBG1pGV5NrCPW3mssHxIn6G9tGE.js
1249 ms
header02.jpg
567 ms
logo.png
637 ms
1.jpg
1211 ms
gyosai_collection.jpg
865 ms
aramata_collection.jpg
887 ms
ara.jpg
1092 ms
special_collection.jpg
1228 ms
9.jpg
1864 ms
3.jpg
2267 ms
4.jpg
2041 ms
10.jpg
1774 ms
7.jpg
2440 ms
2.jpg
2457 ms
11.jpg
2477 ms
12.jpg
2566 ms
kokusho.jpg
3231 ms
kanseki.jpg
3144 ms
bonn.jpg
3292 ms
6.jpg
3606 ms
8.jpg
3838 ms
5.jpg
3793 ms
exhib.jpg
3993 ms
dcollections.lib.keio.ac.jp 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
dcollections.lib.keio.ac.jp 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
dcollections.lib.keio.ac.jp 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
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
Tap targets are not sized appropriately
EN
JA
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dcollections.lib.keio.ac.jp can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it does not match the claimed Japanese language. Our system also found out that Dcollections.lib.keio.ac.jp 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.
dcollections.lib.keio.ac.jp
Open Graph description is not detected on the main page of D Collections Lib Keio. 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: