Codezine.jp Site Title

CodeZine(コードジン)

Codezine.jp Meta Description

CodeZineは、株式会社翔泳社が運営するソフトウェア開発者向けのWebメディアです。「デベロッパーの成長と課題解決に貢献するメディア」をコンセプトに、現場で役立つ最新情報を日々お届けします。

Codezine.jp Test Results

codezine.jp Mobile Usability: 100/100


codezine.jp Mobile Speed: 19/100

Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 14 blocking script resources and 10 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
https://cz-cdn.shoeisha.jp/lib/js/jquery.min.js
...
Optimize CSS Delivery of the following:
https://cz-cdn.shoeisha.jp/lib/css/bootstrap_jquery.css?20190724
...
Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 747KiB (57% reduction).
Compressing https://cz-cdn.shoeisha.jp/static/images/author/1444/kondoyuko.jpg could save 118.9KiB (50% reduction).
...
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 586.1KiB (76% reduction).
Compressing https://www.seshop.com/assets/css/bootstrap.css could save 129.4KiB (85% reduction).
...
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://codezine.jp/lib/css/mobile.css (expiration not specified)
...
Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.
Minify CSS for the following resources to reduce their size by 73.3KiB (20% reduction).
Minifying https://www.seshop.com/assets/css/bootstrap.css could save 23.7KiB (16% reduction).
...
Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 40.8KiB (36% reduction).
Minifying https://cz-cdn.shoeisha.jp/lib/js/bootstrap_jquery.js could save 18.4KiB (35% reduction).
...
Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 25.7KiB (27% reduction).
Minifying https://codezine.jp/ could save 16.8KiB (22% reduction).
...

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