[rules-users] question on rule efficiency

[Barry Kaplan]

When the value of a property is compared across two instances, is it better
to create variables for the properties, or is using the object.property for
the comparison equivalent?

Here's an example: I need to match based on the strikePrice property. Is
either version better than the other?


version 1)

   putContract  : OptionInstrument(
                                   optionType == OptionType.PUT) 
   callContract : OptionInstrument(
                                   optionType == OptionType.CALL,
                                   strikePrice > putContract.strikePrice)  
// compare using navigation

version 2)
   putContract  : OptionInstrument(
                                   optionType == OptionType.PUT,
                                   putStrikePrice : strikePrice)              
// delcare the variable
   callContract : OptionInstrument(
                                   optionType == OptionType.CALL,
                                   strikePrice > putStrikePrice)             
// compare using variable

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