wp-includes/cache.php:21Sets up Object Cache Global and assigns it.
function wp_cache_init() { $GLOBALS['wp_object_cache'] = new WP_Object_Cache();}Introduced in 2.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/cache.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.