The BmnRoot framework is one of the most important software tools which are used in the Baryonic Matter at Nuclotron (BM@N) experiment of the NICA project. It consists of modules intended both for simulation of detectors and analysis of experimental data. Most of tasks which are solved by the BmnRoot are CPU time-consuming so performance optimization of the BmnRoot is necessary. In the present paper results of performance study for the BmnRoot software package are presented. Bottlenecks of performance are localized and various approaches to performance optimization are discussed such as algorithmic one and parallelization. Estimates of efficiency and scalability of the software are also given.