Super cache - plugin for Shopy-Script application

Plugin "Super Cache" uses the most powerful website caching technology available today, making page loading practically instantaneous (on average 30ms). Increasing page loading speed will improve SEO, usability, and conversion of the site, and most of the load will be taken off the server, allowing even a weak server to withstand periods of high traffic.

In the cache itself, part of the content can be loaded from the original version of the page to keep information on the site up to date where required.

How plugin "Super Cache" works:

1. When a website is visited, plugin saves an exact copy of the page in HTML format on the server. 
2. It then minifies the HTML and embedded JS and CSS, reducing the page weight by about 20%. 
3. The file is then compressed in GZIP format, which further reduces the page weight by about 10 times. 
4. During subsequent visits to the site, the server sends the saved copy (cache) to the user instead of generating the page with PHP and MySQL, which significantly reduces the load on the server's CPU and RAM.

Dynamic cache blocks:

Dynamic blocks allow loading part of the page content into the cache from the original version of the page.

For example, delivery information may depend on the user's city, and delivery information can be loaded from the original version of the page for a specific city into the cache.

Content updates happen in the background (AJAX). Dynamic blocks can also be loaded after the page loads (asynchronously), which can significantly increase page loading speed.

Using dynamic blocks allows achieving compatibility with virtually all plugins and page themes.

Instructions for configuring dynamic blocks can be found in the plugins settings.

Why you need this plugins:

1. Since May 2021, Google has included loading speed in page ranking in search results, which means that by improving speed, you improve the site's SEO optimization. 
2. Fast-loading websites are more convenient for users, which affects page conversion,
3. Improves web server performance, allowing it to survive periods of high traffic.
4. Improves Core Web Vitals performance.

For which websites "Super Cache" will be most effective:

• Site pages load in more than 2 seconds.
• Large page size (lots of embedded, unminified CSS and JS code, spaces, newline characters).
• Pages take a long time to generate with PHP.
• Many plugins are installed that burden the site's operation.
• The server "hangs" under high traffic.

plugins features:

• Scheduled cache clearing (via CRON).
• Manual cache clearing.
• Minification of HTML and embedded JS and CSS code.
• GZIP compression.
• Use of the client-side Server Worker cache (only for modern browsers). Fonts, images, JS and CSS files are additionally stored in the client cache in the browser using Server Worker (based on Google's Workbox library).
• 4 caching strategies for different device types (for desktops, for mobile devices, separate cache for mobile devices and desktops, general cache).
• Works with multiple domains.

Cache rules:

• Pages are cached only for users who are not logged in; for logged-in users, the standard version of the site is displayed (optional).
• Pages are not cached for users with administrator permissions.
• After adding a product to carta, users are shown a non-cached version of the site (for the session).
• If a user has added products to carta, the cache will not be stored.
• After editing a product in the admin panel, the product page and its category pages are removed from the cache.
• After adding a review/comment, the cached product page is removed.
• After placing an order, the pages of the ordered products and their categories are removed from the cache.
• Pages are cached only in the language specified in the plugins settings (if not specified, in any language).
• For any bulk content changes on the site, the cache must be cleared.

Theme compatibility

To work with the graphic themes MegaShop 2.0, Ahead, Flow, Pipeline, and Vogue, enable the option "Disable cache on page refresh" in the plugins settings. No issues have been detected with other themes.