Share - Mathics3

Share[]: release memory forcing Python to do garbage collection. If Python package psutil installed is the amount of released memoryis returned. Otherwise returns $0$. This function differs from WMA which tries to reduce the amount of memory required to store definitions, by reducing duplicated definitions.
Share[Symbol]: Does the same thing as Share[]; Note: this function differs from WMA which tries to reduce the amount of memory required to store definitions associated to Symbol.