IMAGE PROCESSING APPARATUS, PROCESSING TIME SIMULATION APPARATUS AND NON-TRANSITORY COMPUTER READABLE MEDIUM

An image processing apparatus includes: a fixing device that has a fast heating mode and a heat storage mode; and a selection section that selects any one of a case where execution of a job indicating an image forming process of a predetermined batch throughput is instructed, and when the fixing device returns to a normal power state from a power saving state, the fixing mode in which an image forming process is early completed is selected on the basis of a total throughput of the job to perform the image forming process, and a case where during the total throughput of the job is not determined or in a case where the job corresponds to a plurality of sets, the fast heating mode is selected as an initial operation for at least the first set to perform the image forming process.