Problem
Creating a large number of objects using CreateObject can be slow and degrade performance.
Solution
ColdFusion allows an application to create a typed object from a structure by specifying the __type__ key in the structure.
Detailed explanation
When creating a large number of typed objects in ColdFusion, the CreateObject method can slow down an application and degrade performance by a significant amount.
Creating typed objects is usually done when working with Adobe Flex through remoting.
In order to improve the perfomance of object creation it is possible to create a typed object from a structure by specifying the __type__ key and supplying the object type as the value.
The following code demonstrates both methods of creating the same object:
Using CreateObject:
<cfset oPerson = CreateObject( "component", "model.vo.PersonVO" ) /> <cfset oPerson['firstName'] = "Kevin" /> <cfset oPerson['lastName'] = "Schmidt" />
Using __type__
<cfset oPerson = StructNew() /> <cfset oPerson['__type__'] = "model.vo.PersonVO" /> <cfset oPerson['firstName'] = "Kevin" /> <cfset oPerson['lastName'] = "Schmidt" />
Both of the objects above will be of the same type, model.vo.PersonVO when they are returned. While this may seem like a hack, it is officially supported by Adobe and appears in the ColdFusion documentation.
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