Not sure why you say login triggers are intensive on CPU - there is a common issue where coders use logic such as select * from master..sysprocesses which can drive pss spinlock contention - but there are lot of ways to avoid this by using the ACF with system session contexts or pssinfo() function to avoid holding the spinlock so long. Is that the problem you are thinking of???? Otherwise, most login procs are very simplistic and short so not a lot of cpu time.
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