Peter Wilson

This is a utility plugin for backporting a minor performance improvement scheduled for inclusion in WordPress 6.6 to earlier versions.
In WordPress 6.4 the function <code>wp_prime_option_caches()</code> was introduced to allow for multiple options to be queried in a single database call.
On sites without a persistent cache, temporary transients are stored in two options. One containing the transient itself, the other containing the timeout. These are stored as <code>_transient_[transient name]</code> and <code>_transient_timeout_[transient name]</code>.
In WordPress 6.6 and later, these options are primed by a single database call using the priming function. This plugin can be used on WordPress 6.4 and 6.5 to backport the functionality.
While a mild improvement on sites making limited use of transients, this can significantly reduce the number of database queries on sites running plugins making heavy use of transients.

Performant Transients

Reduce the number of database calls querying transients.

Josh Pollock

Makes caching the results of a WP_Query, WP_User_Query and WP_Meta_Query, via the transients API easy. Realize increased performance, by caching the results of your queries, with one simple function.
All saved queries are automatically reset when any post is updated.
Basic usage:
<ul>
<li>Specify arguments for the query ($args)</li>
<li>Give the query a name ($name)</li>
<li>$query = jpd2_better_query( $args, $name );</li>
<li>Use $query like you would any other WP_Query object.</li>
<li>See FAQ for other usages</li>
</ul>

JPD2

Makes caching WordPress queries via the Transients API easy.

Performant Transients vs JPD2