perf: prime curriculum item post caches before rendering - #641
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perf: prime curriculum item post caches before rendering
Avoid repeated post lookups while rendering course curriculum items by
priming the WordPress post cache for all curriculum item IDs before the
section items are rendered.
Collect the post IDs from all curriculum sections and call
_prime_post_caches()once with the complete list. This allows WordPressto load the required post objects into the object cache in advance,
reducing repeated
get_post()database queries during curriculumrendering.
The cache is primed only when curriculum item IDs are available, avoiding
an unnecessary cache operation for empty sections.
This improves the performance of single-course curriculum rendering,
particularly for courses containing a large number of lessons, quizzes,
and other curriculum items.