1. An information-processing device that executes a specific process more frequently than other processes among a variety of processes, said information-processing device comprising: a first processor capable of executing an instruction set corresponding to the variety of processes; and a second processor capable of executing a portion of or the entire instruction set, said second processor being capable of executing a part of said instruction set corresponding to the specific process more efficiently than said first processor, wherein said second processor executes the specific process whereas said first processor executes the other processes.