Advanced file based page cache with PHP Opcache boost option (500x faster than Redis and Memcached).
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README.md

Build Status Version

WordPress File Page Cache

Advanced file based page cache with PHP Opcache boost option (500x faster than Redis and Memcached).

Installation

Github Updater

This plugin can be installed and updated using Github Updater (installation instructions)

Installation instructions

Step 1: Install Github Updater and first optimization plugin

Installing and updating the plugins is possible using Github Updater. It is easy to install one of the plugins. You simply need to download the Github Updater plugin (zip file), install it from the WordPress plugin admin panel and copy the Github URL of the plugin into the Github Updater installer.

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Step 2: Install other optimization plugins with a single click

A recent update of all plugins contains a easy single click install button.

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Description

This plugin is a file based page cache with PHP Opcache support (500x faster than Redis and Memcached).

PHP Opcache

The PHP Opcache option enables to serve cache using WordPress advanced-cache.php (WP_CACHE) before MySQL and plugns are loaded, with zero file IO (full memory based cache without serialization overhead). The cache supports conditional requests (304 - Not Modified) to save bandwidth.

When using PHP Opcache, the cache is as fast as it can be in PHP.

Cache speed (full cache process time) on a 1-core VPS: 60μs (0.06ms or 0.00006 seconds). No file IO!

Cache Speed

Advanced configuration

The plugin provides a cache policy editor that enables to selectively enable/disable or configure the page cache based on page URLs (with regular expression support) or conditional methods such as is_page. The cache policy enables to customize the cache expire time and stale update option for individual pages.

Cache Policy Editor

PHP Opcache may have a limited total size. The PHP Opcache option can be configured for individual pages using a individual cache policy.

Other advanced configuration include a custom bypass policy, a HTTP header cache policy and more.

Dynamic Content Cache

The plugin provides an option to create a custom MD5 cache hash using PHP variables and methods to enable caching of dynamic content (multiple cache versions for the same URL).

Custom Cache Hash

Stale on update

The plugin provides an option to serve stale (expired) cache to visitors while the cache is updated in the background.

Cache Preloader

The plugin provides an option to automatically preload the cache on a set time. An advanced preload policy enables to configure precisely what pages to preload and to set the preload interval, priority and to force a cache update for individual pages.

Cache Preload

PHP Opcache Management

The plugin provides PHP Opcache status and management panel.

PHP Opcache Management

HTML Search & Replace

A search & replace filter enables to modify the HTML before a page is cached. It supports regular expression.

Search & Replace

Additional features can be requested on the Github forum.

WordPress WPO Collection

This plugin is part of a Website Performance Optimization collection that include CSS, HTML, Web Font, HTTP/2, Progressive Web App (Service Worker) and Security Header optimization.

The WPO optimization plugins provide in all essential tools that enable to achieve perfect Google Lighthouse Test scores and to validate a website as Google PWA, an important ranking factor for Google's Speed Update (July 2018).

Google Lighthouse Perfect Performance Scores

The WPO optimization plugins are designed to work together with single plugin performance. The plugins provide the latest optimization technologies and many unique innovations.

JSON configuration

100% of the WPO plugin settings are controlled by JSON. This means that you could use the plugins without ever using the WordPress admin forms.

The JSON is verified using JSON schema's. More info about JSON schemas.

Local editing of optimization settings

A recently added Stealth Optimization Config Proxy concept makes it possible to edit the plugin settings using physical .json files from a local editor (with auto upload) making it efficient for fine tuning optimization settings. An update would cost a second compared to using + saving a WordPress admin panel.

https://github.com/o10n-x/wordpress-http2-optimization/releases/tag/0.0.55

Google PageSpeed vs Google Lighthouse Scores

While a Google PageSpeed 100 score is still of value, websites with a high Google PageSpeed score may score very bad in Google's new Lighthouse performance test.

The following scores are for the same site. It shows that a perfect Google PageSpeed score does not correlate to a high Google Lighthouse performance score.

Perfect Google PageSpeed 100 Score Google Lighthouse Critical Performance Score

Google PageSpeed score is outdated

For the open web to have a chance of survival in a mobile era it needs to compete with and win from native mobile apps. Google is dependent on the open web for it's advertising revenue. Google therefor seeks a way to secure the open web and the main objective is to rapidly enhance the quality of the open web to meet the standards of native mobile apps.

For SEO it is therefor simple: websites will need to meet the standards set by the Google Lighthouse Test (or Google's future new tests). A website with perfect scores will be preferred in search over low performance websites. The officially announced Google Speed Update (July 2018) shows that Google is going as far as it can to drive people to enhance the quality to ultra high levels, to meet the quality of, and hopefully beat native mobile apps.

A perfect Google Lighthouse Score includes validation of a website as a Progressive Web App (PWA).

Google offers another new website performance test that is much tougher than the Google PageSpeed score. It is based on a AI neural network and it can be accessed on https://testmysite.thinkwithgoogle.com