Timer macro

A macro for timing a block of code. Could it be added to standard distribution?

// sets "elapsed" to elapsed time
timer elapsed:
pass
Output:
_startTime1_ = System.DateTime.get_Now()
elapsed = System.DateTime.op_Subtraction(System.DateTime.get_Now(), _startTime1_)

// prints "Elapsed time: ${__elapsedTime

__}"
timer:
pass

Output:
_startTime2_ = System.DateTime.get_Now()
_elapsedTime2_ = System.DateTime.op_Subtraction(System.DateTime.get_Now(), _startTime2_)
System.Console.Write('Elapsed time: ')
System.Console.WriteLine(_elapsedTime2_)