A method, device, and system are disclosed. In one embodiment, the method comprises receiving a code segment to be inserted into a flash memory storing code segments, selecting one or more contiguous code segments in flash memory with a total size equal to or larger than the received code segment, calculating the amount of data movement necessary for the one or more selected contiguous code segments, and if the amount is minimum, moving the one or more selected contiguous code segments and replacing them with the received code segment.