Atmarkit.co.jp Site Title

ITエキスパートのための問題解決メディア - @IT

Atmarkit.co.jp Meta Description

プロフェッショナルなIT技術者・管理者のためのコンテンツとコミュニティ満載の問題解決サイト。製品や技術に関する高度な解説記事や、掲示板、質問コーナーなど。

Atmarkit.co.jp Test Results

atmarkit.co.jp Mobile Usability: 100/100


atmarkit.co.jp Mobile Speed: 54/100

Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 8 blocking script resources and 1 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://www.atmarkit.co.jp/js/spv/movePC2SP.js?date=201910251124
...
Optimize CSS Delivery of the following:
https://www.itmedia.co.jp/css/spv/html5base_v2.css?date=201903051104
Avoid landing page redirects
Your page has 3 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://atmarkit.co.jp/
...
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://cx.api.itmedia.co.jp/v1.js (expiration not specified)
...
Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 38.7KiB (33% reduction).
Compressing https://tpc.googlesyndication.com/daca_images/simgad/6904939872854873814 could save 20.4KiB (22% 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 8.7KiB (25% reduction).
Minifying https://www.atmarkit.co.jp/js/spv/html5base.js?date=201909201153 could save 1.8KiB (27% reduction) after compression.
...
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 2.1KiB (21% reduction).
Minifying https://www.atmarkit.co.jp/ait/spv/ could save 2.1KiB (21% reduction) after compression.
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 527B (45% reduction).
Compressing https://dlv.itmedia.jp/adsv/v1?posall=RECTANGL&oe=shift_jis&nurl=https%3A//www.atmarkit.co.jp/ait/spv/&fp=root%2Fsmartphone%2Fait%2Ftop&word=&rnd=1575327574021&composite=1575327573996&ref=&x-cxsegids=&t=js could save 527B (45% reduction).

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