Report Summary

  • 76

    Performance

    Renders faster than
    84% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    29% of websites

  • 69

    SEO

    Google-friendlier than
    37% of websites

libron.net

Libron(リブロン) – 図書館をもっと身近に

Page Load Speed

2.2 sec in total

First Response

53 ms

Resources Loaded

1.9 sec

Page Rendered

241 ms

libron.net screenshot

About Website

Visit libron.net now to see the best up-to-date Libron content for Japan and also check out these interesting facts you probably never knew about libron.net

Libron(リブロン)は、カーリルAPIを使いAmazonのページから最寄りの図書館(全国7000以上の図書館に対応)の蔵書を検索できる便利なツールです。iPhone版、Firefox Greasemonkey版、Chrome Extension版を配布しています。

Visit libron.net

Key Findings

We analyzed Libron.net page load time and found that the first response time was 53 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

libron.net performance score

76

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

60/100

10%

LCP (Largest Contentful Paint)

Value5.0 s

26/100

25%

SI (Speed Index)

Value2.7 s

96/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.3 s

85/100

10%

Network Requests Diagram

www.libron.net

53 ms

import.css

9 ms

jquery.min.js

31 ms

jquery.featureList-1.0.0.js

13 ms

function.js

12 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 36% of them (32 requests) were addressed to the original Libron.net, 14% (12 requests) were made to Static.xx.fbcdn.net and 7% (6 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (377 ms) relates to the external source B.st-hatena.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 125.4 kB (24%)

Content Size

524.7 kB

After Optimization

399.3 kB

In fact, the total size of Libron.net main page is 524.7 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. 55% of websites need less resources to load. Images take 328.6 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 16.6 kB

  • Original 24.0 kB
  • After minification 23.0 kB
  • After compression 7.4 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 16.6 kB or 69% of the original size.

Image Optimization

-1%

Potential reduce by 4.5 kB

  • Original 328.6 kB
  • After minification 324.1 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. Libron images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 87.8 kB

  • Original 150.4 kB
  • After minification 139.8 kB
  • After compression 62.6 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 87.8 kB or 58% of the original size.

CSS Optimization

-76%

Potential reduce by 16.6 kB

  • Original 21.7 kB
  • After minification 15.5 kB
  • After compression 5.1 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. Libron.net needs all CSS files to be minified and compressed as it can save up to 16.6 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 35 (42%)

Requests Now

84

After Optimization

49

The browser has sent 84 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Libron. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

libron.net accessibility score

71

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

libron.net best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

libron.net SEO score

69

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Libron.net 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 Libron.net 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

Open Graph description is not detected on the main page of Libron. 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: