change CreateRecursvie to be more optimistic - better average case performance.
change CreateRecursvie to be more optimistic - better average case performance.

fanngyuan/vitess,fanngyuan/vitess,nso95/vitess,fanngyuan/vitess,nso95/vitess,nso95/vitess,nso95/vitess,fanngyuan/vitess,nso95/vitess,fanngyuan/vitess