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Google PageSpeed is a family of tools by Google Inc, designed to help a website’s performance optimizations. It was introduced at Developer Conference in 2010. There are four main components of PageSpeed family tools: PageSpeed Module, also known as mod_pagespeed, PageSpeed Insights, PageSpeed Service, and PageSpeed Chrome DevTools extension. All of these components are built to identify faults in a website’s compliance with Google’s Web Performance Best Practices, as well as automate the adjustment process. ==PageSpeed Module== Mod_pagespeed is an open-source Apache HTTP Server or Nginx webservers module, which automatically applies chosen filters to pages and associated assets, such as stylesheets, JavaScript, and HTML files, as well as to images and website cache requirements. The largest advantage of this module is that it does not require modifications to existing content or workflow, meaning that all internal optimizations and changes to files are made on the server side, presenting modified files directly to the user. Each of 40+ filters corresponds to one of Google’s web performance best practices rules. Since PageSpeed module is an open-source library, it is frequently updated by numerous developers from all over the world and can be deployed by any individual sites, hosting providers, or CDNs. Installation is relatively easy and can be done in two ways: from packages or build from source on the following supported platforms: *CentOS/Fedora, both 32-bit and 64-bit *Debian/Ubuntu, both 32-bit and 64-bit 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Google PageSpeed Tools」の詳細全文を読む スポンサード リンク
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