Record filters can have an impact in some areas.

The evaluation of record filter expressions is based on the same indexing technology that supports navigation queries in the MDEX Engine. Because of this, there is no additional memory or indexing cost associated with using navigation dimension values in record filters.

Because expression evaluation is based on composition of indexed information, most expressions of moderate size (that is, tens of terms/operators) do not add significantly to request processing time.

Furthermore, because the MDEX Engine caches the results of file-based record filter operations on an LRU (least recently used) basis, the costs of expression evaluation are typically only incurred on the first use of a file-based filter during a navigation session. However, some expected uses of record filters have known performance bounds, which are described below.

Record filters can impact the following areas: