| 摘要 |
A duplication identifier, a substitutor, and a memory controller perform the steps of: comparing information newly acquired by an acquirer and information stored in an operation data memory; determining whether or not at least a portion of the newly acquired information matches a portion of the information stored in the operation data memory; when it is determined that there is no matching portion causing the information acquired by the acquirer to be stored in the operation data memory; and when it is determined that at least a portion of the newly acquired information matches a portion of the information stored in the operation data memory, substituting the information of the portion determined to match the information stored in the operation data memory among the newly acquired information with predetermined information with a smaller volume than the information of the portion, and storing the information in the operation data memory. |
