$#a=-1 will free up all the elements of @a, allowing their memory to be reused. In addition, undef @a frees up the array's AvARRAY structure, which uses typically (4 x maximum array index ever used) bytes. Neither will free up the actual array itself; you need to ensure the variable goes out of scope for that.

Dave.

In reply to Re: memory "release" with $#=-1 by dave_the_m
in thread memory "release" with $#=-1 by ISAI student

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