Introduce a new `wp_cache_flush_runtime()` method

[tillkruess]

From the Object Cache Performance team: ​https://github.com/WordPress/performance/issues/81

Allowing users to flush the runtime (in-memory) cache, without flushing the entire persistent cache is an often requested feature for apps running long processes, such as Action Scheduler or WP-CLI.

Implementation of the new wp_cache_flush_runtime() method to flush the runtime memory.

See ​https://github.com/WordPress/performance/issues/81

Trac ticket: https://core.trac.wordpress.org/ticket/55080

Am I missing something here. There is implementation in WP_Object_Cache class found in class-wp-object-cache.php.
There should be a flush_runtime() method and have some implementation.

Am I missing something here. There is implementation in WP_Object_Cache class found in class-wp-object-cache.php.
There should be a flush_runtime() method and have some implementation.

There should be a flush_runtime() method and have some implementation.

We can do that, but since this cache implementation is non-persistent it is identical to flush. Would you want a shim for that anyhow?

Would you want a shim for that anyhow?

Second thoughts, no point.

[flixos90]

@tillkruess @spacedmonkey Latest PR ​https://github.com/WordPress/wordpress-develop/pull/2282 looks good to me!

[spacedmonkey]

In 52772:

Cache API: Add wp_cache_flush_runtime function

Add a new function called wp_cache_flush_runtime to existing caching functions found in WordPress. This function allows users to flush the runtime (in-memory) cache, without flushing the entire persistent cache.

Props: Spacedmonkey, tillkruess, flixos90, adamsilverstein, SergeyBiryukov, barryhughes.
Fixes: #55080.

Merged.

[spacedmonkey]

Dev note ready for ​review.

[spacedmonkey]

Dev note - ​https://make.wordpress.org/core/2022/04/29/caching-improvements-in-wordpress-6-0/