We have issues with the performance because of this: https://github.com/java-native-access/jna/blob/master/src/com/sun/jna/Memory.java#L57-L58
Lock waiting can get up to 99% of the time under a heavy load. SynchronizedMap works very slow in a multi-threaded environment. I suggest replacing it with any parallel map implementation.