Artemis MQ locking seen from Dynatrace

Issue

• In our case, Artemis client stumbled upon synchronization block of which reported as long LOCK time by Dynatrace. Excerpt from ActiveMQConnectionFactory code confirms this.
• When executing Threads tried to enter synchronised method, it will acquires lock(monitor). This usually take more time compared to unsynchronised version. Since this looks expensive(I stand to be corrected)
• is there other way to improve this? for example using PooledConnectionFactory ...et all.