CS202
6- ‹#›
Efficiency Considerations
nTemporary objects are often created by implicit type conversions or when arguments are returned by
value.
nWhen an operator and its
operands are evaluated, an rvalue
is often created.
nThat rvalue is a temporary on the stack that can be used
within a larger expression. The
lifetime of the temporary
is from the time it is created until the end of the statement in which it is used.
nWhile the use of
temporaries is necessary to protect the original contents of the operator's operands, it does require additional memory and extra (and sometimes redundant) copy operations.