1. A method for automated performance testing in a multi-tenant environment in a multi-tenant database system, the method comprising: revising code, stored on one or more non-transitory computer readable media associated with a host system having a processor system including one or more processors, the revising of the code being performed by the host system based on a list of changes to make to the code; within an environment associated with the host system, by the processor system, invoking the code after the revising of the code therein causing the code to run on the host system within the environment; collecting information indicative of performance of the code, the information being based on performance metrics that are independent of the environment; and storing the performance metrics for later retrieval and analysis, wherein the collecting of the information indicative of the performance of the code including at least collecting information related to memory usage, the information related to memory usage includes at least information about requests placed for retrieving information from a set of physical memory locations, information about requests placed for retrieving information from a set of physical memory locations, information about requests placed for adding information to a set of physical memory locations, and information about memory usage of a memory location set aside for an application exchange.