>>We have a vertical market app, it's been going for ages and the latest version we split out the data layer by creating data object.
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>>Longer term the aim is to move to a SQL back end and then eventually to a .Net front, but in the mean time the data objects read VFP tables and scatters the fields into properties of the object. The UI then reads/writes to the object properties.
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>>We also load the fields into a second property so field 'surname' would become .surname and also .o__surname so we can see within the UI and object if the value has changes (o__) being original value.
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>>This has worked fine and we have been rolling out to our install base. However we have hit a snag at some sites where the .Save() on the data objects is running very slow.
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>>The .Save() uses aMembers, loops through all the properties, if the property name starts with .o__ it know it is a data property, it Evaluates the current value, original value and table value (other users may have changed record in table). If the value has changed it uses a replace statement to update the table.
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>>I am looking for advise for neater/faster ways I might accomplish the data save?
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>I can't say I like the idea of using just a variation of property names to distinguish state. Surely it would be cleaner to maintain two copies of the object - one for the original state and one to take changes. That would also tie in better with any requirement to also check against current database state....
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>That said, my VFP is too rusty to remember if there is a simple way of quickly checking whether all properties of two objects of the same type have equal values. If there *were* then unchanged objects would not need drilling into.....

If you keep two (data )objects you can use compObj()