[Admin Radar] Cached 24341/350705 entities in 234.179248 seconds!

any idea why it would take so long to perform the above?

same config on another server, with 2x more entities takes less than half the amount of time.

hardware/fps related.. "on another server" - so same hardware same fps?

Same hardware, more entities than the one taking forever.

there's nothing wrong with that time. it is intentionally slow to prevent any server performance issues. it caches 50 entities at a time regardless of your entity count, and waits for the end of the frame before it continues on. the key difference you're having is the time between each frame. so your server.fps is likely far different than your other server.