MemoryInUse

gives the number of bytes currently being used to store all data in the current Wolfram Language kernel session.

gives the number of bytes used in the Wolfram System front end.

Examples

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Basic Examples (2)

Current memory use in the kernel:

Storing a million elements of t takes additional memory:

Current memory use in the front end:

Even though there is no visible output, the result is still assigned to Out[2], so memory is used:

Add an expression after the ; to prevent the large result being assigned to Out[4]:

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