As of the publishing of this entry, there is nothing inherent in ArcScript that performs the equivalent of a sleep or delay - all commands in ArcScript are executed immediately.
In most cases, it is desirable to execute scripting operations immediately, but there may be times when a sleep between calls would be useful (for example, when interspersing calls to an API that may be rate limited). In that situation, you can effectively create a delay in ArcScript through use of the sysExecute operation, which allows for the execution of external processes on the machine.
On a Windows environment, for example, you can call out to a batch file which itself implements the delay:
<arc:set attr="sys.Name" value="C:\\ProgramData\\CData\\Arc\\Sleep_2s.bat" />
<arc:call op="sysExecute" item="sys" />
In the batch file itself, you can implement your own code for a delay, such as:
timeout 2
