We've found 3 phrases for efficiency (0.209 seconds):

bang for the buck »    Efficiency; cost-effectiveness; value.

hit one's stride »    To reach a full level of efficiency, competence, comfort, etc.; to get going.

smooth operator »    A person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc.

New:  We also know Zip Codes FYI!