This paper is to evaluate the performance of the three-dimensional model of flock behavior. Performance evaluation of calculations in the two-dimensional model has already been done. I have developed a three- dimensional simulation of flock behavior. As the experiment results, it was found that the three-dimensional model is also applicable for the segmentation method that has been used in two-dimensional space algorithm flock behavior. This paper presents how the processing speed varies depending on the relationship between the number of divisions and the number of individuals. A different characteristic was found in contrast with the two-dimensional model.