1. A method performed by a computer processor, said method comprising: executing an application in a first environment and a second environment; said first environment being a performance environment; said second environment being an instrumented environment; receiving an input stream for said application; identifying a first unit of work within said input stream and causing said first unit of work to be executed within said first environment; identifying a second unit of work within said input stream and causing said second unit of work to be executed within said second environment.