getTimestamp() Function

Syntax	NONE `anInteger = getTimestamp();`
Semantics	Returns a timestamp in microseconds (1/1'000'000^th of a second) as an integer (64bit). A typical use case is the exact measurement of time intervals, e.g. for profiling and logging purposes. The time stamp is calculated in microseconds beginning at the Unix epoch. It's not guarantied that a time stamp is unique. On a sufficiently fast machine it is possible to retrieve two identical time stamps. In some cases, the utility function getSequenceNumber() may be the better solution.
Examples	NONE `set aTimeStamp = getTimestamp();`

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