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The BmnRoot software package plays a crucial role in the BM@N NICA experiment and is used both for simulation and event reconstruction purposes. In this article, few approaches to optimization of simulation and event reconstruction algorithms are presented. Results of performance studies of the BmnRoot modules are obtained using software dynamic analysis. Different methods of optimization including parallelization are considered. Algorithms of tracks global matching are discussed. Results of optimization of the virtual planes method are given. Machine learning methods are analyzed from the point of view of efficiency of particle identification. Flexible and optimal extension of the quality assurance module of the BmnRoot is described. Analysis of fragments for SRC studies with the BM@N experiment is also discussed.

The BM@N (Baryonic Matter at the Nuclotron) is an experiment at the NICA (Nuclotron-based Ion Collider fAcility). The first physics runs were carried out with the collection of experimental data in 2018. For the physics analysis of events recorded by detectors of the BM@N the BmnRoot framework is used. It provides a powerful tools for detector performance studying, event simulation, data analysis and developing new algorithms that continually improve this environment. The QA (Quality Assurance) system is used to evaluate the quality of the event reconstruction procedures and collected data. It displays the results of comparing the properties of the simulated events with the reconstructed ones. However, previous version of QA system was nonflexible because its output was just a set of PNG images. Result of QA system modernization by using JSROOT library is described in current report. After this upgrade histograms are displayed in web browser. User can zoom histograms, change scales, get value of bin by moving the cursor on it, etc. It also became possible to get sample mean and standard deviation for each histogram. Upgraded system is quite scalable, so it can easily be extended with new histograms. At the moment, the modernized system is part of the BmnRoot framework.