The program is mainly in AMODE 31. It switches to AMODE 64 using SAM64 only 
when need to use the table in storage above 2GB and switches back after. Can 
this explain why I only  notice significant delay during initial load? It loads 
a table of 200,000 records from QSAM file to the memory. It switches AMODE back 
and forth at least 3 times for each record.

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