The juvenile dependency statutory scheme requires that petitions under section 300 be heard, and decided rapidly. (Jeff M. v. Superior Court (1997) 56 Cal. App. 4th 1238, 1241 [66 Cal. Rptr. 2d 343].) Continuances are discouraged. ( Id. at p. 1242.) Section 352 contains a number of limitations on the juvenile court's power to continue dependency proceedings. Under subdivision (a), the court may not grant a continuance that is contrary to the child's best interests. A pending criminal prosecution is not considered, in and of itself, good cause for a continuance. Subdivision (b) of section 352 contains two specific restrictions on the juvenile court's discretion to grant continuances. First, if the child is detained, the court cannot grant a continuance that would result in the dispositional hearing being completed more than 60 days after the detention hearing, absent exceptional circumstances requiring such a continuance. Second, the court may not, under any circumstances, grant continuances that would cause the dispositional hearing to be completed more than six months after the detention hearing.