Plugins
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W3 Total Cache

LICENSE TYPE: INFINITE

Description

W3 Total Cache (W3TC) improves the SEO and user experience of your site by increasing website performance and reducing load times by leveraging features like content delivery network (CDN) integration and the latest best practices.

W3TC is the only web host agnostic Web Performance Optimization (WPO) framework for WordPress trusted by millions of publishers, web developers, and web hosts worldwide for more than a decade. It is the total performance solution for optimizing your WordPress Website.

An inside look:

BENEFITS

  • Improvements in search engine result page rankings, especially for mobile-friendly websites and sites that use SSL
  • At least 10x improvement in overall site performance (Grade A in WebPagetest or significant Google Page Speed improvements) when fully configured
  • Improved conversion rates and “site performance” which affect your site’s rank on Google.com
  • “Instant” repeat page views: browser caching
  • Optimized progressive render: pages start rendering quickly and can be interacted with more quickly
  • Reduced page load time: increased visitor time on site; visitors view more pages
  • Improved web server performance; sustain high traffic periods
  • Up to 80% bandwidth savings when you minify HTML, minify CSS and minify JS files.

KEY FEATURES

  • Compatible with shared hosting, virtual private / dedicated servers and dedicated servers / clusters
  • Transparent content delivery network (CDN) management with Media Library, theme files and WordPress itself
  • Mobile support: respective caching of pages by referrer or groups of user agents including theme switching for groups of referrers or user agents
  • Accelerated Mobile Pages (AMP) support
  • Secure Socket Layer (SSL) support
  • Caching of (minified and compressed) pages and posts in memory or on disk or on (FSD) CDN (by user agent group)
  • Caching of (minified and compressed) CSS and JavaScript in memory, on disk or on CDN
  • Caching of feeds (site, categories, tags, comments, search results) in memory or on disk or on CDN
  • Caching of search results pages (i.e. URIs with query string variables) in memory or on disk
  • Caching of database objects in memory or on disk
  • Caching of objects in memory or on disk
  • Caching of fragments in memory or on disk
  • Caching methods include local Disk, Redis, Memcached, APC, APCu, eAccelerator, XCache, and WinCache
  • Minify CSS, Minify JavaScript and Minify HTML with granular control
  • Minification of posts and pages and RSS feeds
  • Minification of inline, embedded or 3rd party JavaScript with automated updates to assets
  • Minification of inline, embedded or 3rd party CSS with automated updates to assets
  • Defer non critical CSS and Javascript for rendering pages faster than ever before
  • Defer offscreen images using Lazy Load to improve the user experience
  • Browser caching using cache-control, future expire headers and entity tags (ETag) with “cache-busting”
  • JavaScript grouping by template (home page, post page etc) with embed location control
  • Non-blocking JavaScript embedding
  • Import post attachments directly into the Media Library (and CDN)
  • Leverage our multiple CDN integrations to optimize images
  • WP-CLI support for cache purging, query string updating and more
  • Various security features to help ensure website safety
  • Caching statistics for performance insights of any enabled feature
  • Extension framework for customization or extensibility for Cloudflare, WPML and much more
  • Reverse proxy integration via Nginx or Varnish

Speed up your site tremendously, and improve the user experience for your readers without having to change WordPress, your theme, your plugins or how you produce your content.

What users have to say:

Who do I thank for all of this?

It’s quite difficult to recall all of the innovators that have shared their thoughts, code and experiences in the blogosphere over the years, but here are some names to get you started:

Please reach out to all of these people and support their projects if you’re so inclined.

Installation

  1. Deactivate and uninstall any other caching plugin you may be using. Pay special attention if you have customized the rewrite rules for fancy permalinks, have previously installed a caching plugin or have any browser caching rules as W3TC will automate management of all best practices. Also make sure wp-content/ and wp-content/uploads/ (temporarily) have 777 permissions before proceeding, e.g. in the terminal: # chmod 777 /var/www/vhosts/domain.com/httpdocs/wp-content/ using your web hosting control panel or your FTP / SSH account.
  2. Login as an administrator to your WordPress Admin account. Using the “Add New” menu option under the “Plugins” section of the navigation, you can either search for: w3 total cache or if you’ve downloaded the plugin already, click the “Upload” link, find the .zip file you download and then click “Install Now”. Or you can unzip and FTP upload the plugin to your plugins directory (wp-content/plugins/). In either case, when done wp-content/plugins/w3-total-cache/ should exist.
  3. Locate and activate the plugin on the “Plugins” page. Page caching will automatically be running in basic mode. Set the permissions of wp-content and wp-content/uploads back to 755, e.g. in the terminal: # chmod 755 /var/www/vhosts/domain.com/httpdocs/wp-content/.
  4. Now click the “Settings” link to proceed to the “General Settings” tab; in most cases, “disk enhanced” mode for page cache is a “good” starting point.
  5. The “Compatibility mode” option found in the advanced section of the “Page Cache Settings” tab will enable functionality that optimizes the interoperablity of caching with WordPress, is disabled by default, but highly recommended. Years of testing in hundreds of thousands of installations have helped us learn how to make caching behave well with WordPress. The tradeoff is that disk enhanced page cache performance under load tests will be decreased by ~20% at scale.
  6. Recommended: On the “Minify Settings” tab, all of the recommended settings are preset. If auto mode causes issues with your web site’s layout, switch to manual mode and use the help button to simplify discovery of your CSS and JS files and groups. Pay close attention to the method and location of your JS group embeddings. See the plugin’s FAQ for more information on usage.
  7. Recommended: On the “Browser Cache” tab, HTTP compression is enabled by default. Make sure to enable other options to suit your goals.
  8. Recommended: If you already have a content delivery network (CDN) provider, proceed to the “Content Delivery Network” tab and populate the fields and set your preferences. If you do not use the Media Library, you will need to import your images etc into the default locations. Use the Media Library Import Tool on the “Content Delivery Network” tab to perform this task. If you do not have a CDN provider, you can still improve your site’s performance using the “Self-hosted” method. On your own server, create a subdomain and matching DNS Zone record; e.g. static.domain.com and configure FTP options on the “Content Delivery Network” tab accordingly. Be sure to FTP upload the appropriate files, using the available upload buttons.
  9. Optional: On the “Database Cache” tab, the recommended settings are preset. If using a shared hosting account use the “disk” method with caution, the response time of the disk may not be fast enough, so this option is disabled by default. Try object caching instead for shared hosting.
  10. Optional: On the “Object Cache” tab, all of the recommended settings are preset. If using a shared hosting account use the “disk” method with caution, the response time of the disk may not be fast enough, so this option is disabled by default. Test this option with and without database cache to ensure that it provides a performance increase.
  11. Optional: On the “User Agent Groups” tab, specify any user agents, like mobile phones if a mobile theme is used.

FAQ

Search engines like Google, measure and factor in the speed of web sites in their ranking algorithm. When they recommend a site they want to make sure users find what they’re looking for quickly. So in effect you and Google should have the same objective.

Speed is among the most significant success factors web sites face. In fact, your site’s speed directly affects your income (revenue) — it’s a fact. Some high traffic sites conducted research and uncovered the following:

  • Google.com: +500 ms (speed decrease) -> -20% traffic loss [1]
  • Yahoo.com: +400 ms (speed decrease) -> -5-9% full-page traffic loss (visitor left before the page finished loading) [2]
  • Amazon.com: +100 ms (speed decrease) -> -1% sales loss [1]

A thousandth of a second is not a long time, yet the impact is quite significant. Even if you’re not a large company (or just hope to become one), a loss is still a loss. However, there is a solution to this problem, take advantage.

Many of the other consequences of poor performance were discovered more than a decade ago:

  • Lower perceived credibility (Fogg et al. 2001)
  • Lower perceived quality (Bouch, Kuchinsky, and Bhatti 2000)
  • Increased user frustration (Ceaparu et al. 2004)
  • Increased blood pressure (Scheirer et al. 2002)
  • Reduced flow rates (Novak, Hoffman, and Yung 200)
  • Reduced conversion rates (Akamai 2007)
  • Increased exit rates (Nielsen 2000)
  • Are perceived as less interesting (Ramsay, Barbesi, and Preece 1998)
  • Are perceived as less attractive (Skadberg and Kimmel 2004)

There are a number of resources that have been documenting the role of performance in success on the web, W3 Total Cache exists to give you a framework to tune your application or site without having to do years of research.

It’s a complete framework. Most cache plugins available do a great job at achieving a couple of performance aims. Our plugin remedies numerous performance reducing aspects of any web site going far beyond]]>

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