1. A method comprising: intercepting, from a server computer, a first set of instructions that define one or more objects and one or more operations that are based, at least in part, on the one or more objects; generating, in memory, one or more data structures that correspond to the one or more objects; performing the one or more operations on the one or more data structures; updating the one or more data structures, in response to performing the one or more operations, to produce one or more updated data structures; rendering a second set of instructions, which when executed by a remote client computer cause the remote client computer to generate the one or more updated data structures in memory on the remote client computer, wherein the second set of instructions are different than the first set of instructions; sending the second set of instructions to the remote client computer; wherein the method is performed by one or more computing devices.