Tools & Wizards About Us
dcollections.lib.keio.ac.jp screenshot

Report Summary

  • 71

    Performance

    Renders faster than
    82% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 73% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

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Digital Collections of Keio University Libraries |

Page Load Speed

9.2 sec in total

First Response

591 ms

Resources Loaded

7.4 sec

Page Rendered

1.1 sec

dcollections.lib.keio.ac.jp screenshot

About Website

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.jp

Key Findings

We analyzed Dcollections.lib.keio.ac.jp page load time and found that the first response time was 591 ms and then it took 8.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

dcollections.lib.keio.ac.jp performance score

71

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

48/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

60/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.158

73/100

15%

TTI (Time to Interactive)

Value4.4 s

84/100

10%

Network Requests Diagram

dcollections.lib.keio.ac.jp

591 ms

ja

1123 ms

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css

495 ms

css_y5V-74fl2u3TPnO7Vzl0srF2_LEAmcANj4_-6qPJyxk.css

513 ms

css_YmuMqUm--85MDg6GF8xFt60xnxOSYeKArfr5yk0-sVc.css

517 ms

Our browser made a total of 34 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 (3.7 sec) belongs to the original domain Dcollections.lib.keio.ac.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 141.9 kB (5%)

Content Size

2.8 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

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. 50% of websites need less resources to load. Images take 2.6 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 25.1 kB

  • Original 30.9 kB
  • After minification 25.6 kB
  • After compression 5.8 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 5.3 kB, which is 17% 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 25.1 kB or 81% of the original size.

Image Optimization

-4%

Potential reduce by 103.1 kB

  • Original 2.6 MB
  • After minification 2.5 MB

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.

JavaScript Optimization

-16%

Potential reduce by 13.6 kB

  • Original 82.6 kB
  • After minification 82.6 kB
  • After compression 69.0 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.

CSS Optimization

-0%

Potential reduce by 83 B

  • Original 36.8 kB
  • After minification 36.8 kB
  • After compression 36.8 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. Dcollections.lib.keio.ac.jp has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (28%)

Requests Now

32

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 32 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.

Network Requests Diagram

dcollections.lib.keio.ac.jp

dcollections.lib.keio.ac.jp

591 ms

ja

ja

1123 ms

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css

495 ms

css_y5V-74fl2u3TPnO7Vzl0srF2_LEAmcANj4_-6qPJyxk.css

css_y5V-74fl2u3TPnO7Vzl0srF2_LEAmcANj4_-6qPJyxk.css

513 ms

css_YmuMqUm--85MDg6GF8xFt60xnxOSYeKArfr5yk0-sVc.css

css_YmuMqUm--85MDg6GF8xFt60xnxOSYeKArfr5yk0-sVc.css

517 ms

css_cw1b1kWU8aZDrz9DZWww1_TFHba3lJirdHB0do0GcN8.css

css_cw1b1kWU8aZDrz9DZWww1_TFHba3lJirdHB0do0GcN8.css

515 ms

css_zKvAAbvxo1_uaLH8tnMhKbE5BbtqDllzB8d8FWxeJPc.css

css_zKvAAbvxo1_uaLH8tnMhKbE5BbtqDllzB8d8FWxeJPc.css

689 ms

js_s5koNMBdK4BqfHyHNPWCXIL2zD0jFcPyejDZsryApj0.js

js_s5koNMBdK4BqfHyHNPWCXIL2zD0jFcPyejDZsryApj0.js

884 ms

js_9zIIFQiCD8pZrA151Tot9ewRJQxqRzBMZQIabkgsEbk.js

js_9zIIFQiCD8pZrA151Tot9ewRJQxqRzBMZQIabkgsEbk.js

996 ms

js_D513xrHxkFzR3xMs-U1B-okOiPuXCy6MX1kwfrKN5Ls.js

js_D513xrHxkFzR3xMs-U1B-okOiPuXCy6MX1kwfrKN5Ls.js

1016 ms

js_GFJ5HOZCW03xLrFJqVqVKm_nCgojB8I7wud9IryCSSs.js

js_GFJ5HOZCW03xLrFJqVqVKm_nCgojB8I7wud9IryCSSs.js

1023 ms

js_zWSclLS0DOxzDQ9bttaghvuwtV_X86DTdkcxieTZQL4.js

js_zWSclLS0DOxzDQ9bttaghvuwtV_X86DTdkcxieTZQL4.js

1029 ms

js_MRdvkC2u4oGsp5wVxBG1pGV5NrCPW3mssHxIn6G9tGE.js

js_MRdvkC2u4oGsp5wVxBG1pGV5NrCPW3mssHxIn6G9tGE.js

1226 ms

header02.jpg

header02.jpg

578 ms

logo.png

logo.png

647 ms

1.jpg

1.jpg

1139 ms

aramata_collection.jpg

aramata_collection.jpg

829 ms

ara.jpg

ara.jpg

847 ms

special_collection.jpg

special_collection.jpg

786 ms

9.jpg

9.jpg

1744 ms

3.jpg

3.jpg

1980 ms

4.jpg

4.jpg

1977 ms

10.jpg

10.jpg

1474 ms

7.jpg

7.jpg

2079 ms

2.jpg

2.jpg

2528 ms

11.jpg

11.jpg

2125 ms

12.jpg

12.jpg

2447 ms

kokusho.jpg

kokusho.jpg

3159 ms

kanseki.jpg

kanseki.jpg

2848 ms

bonn.jpg

bonn.jpg

2920 ms

6.jpg

6.jpg

3253 ms

8.jpg

8.jpg

3663 ms

5.jpg

5.jpg

3714 ms

exhib.jpg

exhib.jpg

3670 ms

Accessibility Review

dcollections.lib.keio.ac.jp accessibility score

89

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

High

Image elements do not have [alt] attributes

Best Practices

dcollections.lib.keio.ac.jp best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

dcollections.lib.keio.ac.jp SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    JA

  • Encoding

    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.

Social Sharing Optimization

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: