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Go with the API. The messaging approach requires you to iterate through the stack, while the API will return the entire stack in one pass.

Eric

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of Lim Hock-Chai
Sent: Wednesday, August 06, 2008 1:40 PM
To: RPG programming on the AS400 / iSeries
Subject: Call stack inquiry performance - QWVRCSTK vs QMHSNDPM+QMHRCVPM


I've a service program that accepts program-name as one of the input
parameters. When this parameter is passed in by the caller, it will
need to determine if the passed in Program Name is actually in the
current call stack. There are two ways that I know of that can
determine if a program is on the call stack, one is using the QWVRCSTK
api to get the current call stack; Another way is use the
QMHSNDPM+QMHRCVPM to get the call stack one level at a time. Does
anybody know which will perform better, or is there another way to
determine if a program is on the current call stack?

thanks

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