Hello,
I will repost here my reply for this issue I sent you through another support channel, in case it is helpful for others:
When the 'input' parameter is set to False, the performance of both SBSAR instance nodes in the provided graph is similar. This points me to the likely cause of the performance difference.
This would be a known issue, which is caused by the way values are implemented in Designer.
I imagine there is some kind of switch in the SBSAR instance node graph that returns
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