Type instances

A system comprising:

• one or more computers associated with an enterprise portal;
• and
• a computer-readable medium coupled to the one or more computers having instructions stored thereon which, when executed by the one or more computers, cause the one or more computers to perform operations comprising:
• identifying a reference to a type instance during execution of a first child control flow in a process, wherein the first child control flow is associated with one or more ancestor control flows;
• searching one or more ancestor memory stack frames associated with the one or more ancestor control flows for a prior instantiation of the type instance;
• providing access to the prior instantiation of the type instance in an identified ancestor memory stack frame associated with an identified ancestor control flow in response to determining that the prior instantiation of the type instance exists in the identified ancestor memory stack frame;
• and
• instantiating a new instance of the type instance in a memory stack frame associated with the first child control flow for use during execution of the first child control flow in the process in response to determining that the prior instantiation of the type instance does not exist in the one or more ancestor memory stack frames.

A computer program product encoded on a non-transitory storage medium, the product comprising non-transitory, computer readable instructions for causing one or more processors to perform operations comprising:

• identifying a reference to a type instance during execution of a first child control flow in a process, wherein the first child control flow is associated with one or more ancestor control flows;
• searching one or more ancestor memory stack frames associated with the one or more ancestor control flows for a prior instantiation of the type instance;
• providing access to the prior instantiation of the type instance in an identified ancestor memory stack frame associated with an identified ancestor control flow in response to determining that the prior instantiation of the type instance exists in the identified ancestor memory stack frame;
• and
• instantiating a new instance of the type instance in a memory stack frame associated with the first child control flow for use during execution of the first child control flow in the process in response to determining that the prior instantiation of the type instance does not exist in the one or more ancestor memory stack frames.