1. One or more computer-readable media storing computer-useable instructions that, when used by a computing device, cause the computing device to perform a method for facilitating an efficient interleaving process, the method comprising: receiving a search query; determining that the search query is to be used in an interleaving experiment, the interleaving experiment using a primary ranking system and a secondary ranking system; based on the search query, analyzing the primary ranking system and the secondary ranking system to determine, prior to routing the search query to either ranking system, whether search results produced by the primary ranking system and the secondary ranking system will be identical; if it is determined that the search results will be identical, routing the search query only to the primary ranking system; and if it is determined that the search results will not be identical, routing the search query to both the primary ranking system and the secondary ranking system.