1. A method, comprising: receiving an asynchronous business process specification declared in a procedural markup language comprising an activity flow model and a plurality of activities; receiving a turbo-mode request indication for a subset of the plurality of activities, wherein turbo-mode for an associated subset is performed by synchronously executing the associated subset; fetching all process execution related objects associated with the turbo-mode requested subset once into a RAM memory and cached for a duration of execution of the turbo-mode requested subset; and using a processor to execute the turbo-mode requested subset in a single execution transaction context, wherein executing comprises executing with a determinate execution time.