Systems and methods for improved flash memory performance in a portable computing device are presented. In a method, a value N corresponding to an amount of prefetch data to be retrieved from the flash memory is determined. An access request for a flash memory is received at a cache controller in communication with a cache memory. A determination is made whether the access request for the flash memory corresponds to a portion of data stored in the cache memory. If the access request for the flash memory corresponds to the portion of data, the portion of data is returned in response to the access request. Otherwise, an N amount of prefetch data is retrieved from the flash memory and stored in the cache memory. The value N is incremented based on a cache hit percentage for the cache memory.