Disclosed are a method, system, and computer program product for determining a common factor contributing to network activity with reduced computational resource utilization. In some embodiments of the present invention, the method or the system determines one or more factors by examining one or more information transmitted across the network. The method or the system stores a number of information attributable to each of the factors and determines whether the number exceeds a threshold requirement. Where the number for a factor exceeds the threshold requirement, the method or the system then determines a summary statistic for the number of information. Thereafter, the method or the System updates the data structure corresponding to the factor being analyzed based upon the summary statistic. Once the data structure is updated based upon the summary statistic, the method or the system determine one or more common factors for the network activities.