How long for a held ball?

[KJUmp]

Originally Posted by Snaqwells

Ideally, I wait to see if the ball is stuck. If neither player can free it without "undue roughness," I hit the whistle.

The fact is, sometimes I find myself hitting whistle sooner than I'd like. Sometimes I wait too long.

Newbie question:
If play has been "rough" in the game, is it considered good mechanics to be a bit quicker with the whistle in a held ball situation?
Not looking to impose my own interp. of 4.25.1 here...just a game management question.