The only real test is to program them all and time them (using the seconds() function, maybe)...that should be easy enough and will give you a definite answer...

Joe

>I want to maximize the speed of performing calculations in related tables. I will be performing a REPLACE on every record in the child table based on values in the Parent record. Any thoughts on the best performers ?
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>1) Using Set Relation to 'automate' finding records in child tables
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>2) Using Set Filter to 'manually' SKIP thru records in child tables based on Parent key.
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>3) Using Scan For in child table based on Parent key.
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>4) Using good old fashion Seek in the Child table based on Parent key.