1. A method comprising: at a first computing system having one or more processors and memory storing one or more programs for execution by the one or more processors: identifying a service request submitted by a user, wherein the service request includes a first computing task and a second computing task; the first computing task is associated with a first program suite, stored on the first computing system, for executing the first computing task; the first program suite includes a first data stack and a first code library; the second computing task is associated with a second program suite, stored on the first computing system, for executing the second computing task; and the second program suite includes a second data stack and a second code library; in accordance with a first determination that the first computing task is capable of being executed in parallel with the second computing task, executing the first computing task on the first computing system to produce first results, including executing the first code library on the first data stack to produce a first modified data stack, wherein the first modified data stack comprises a first tree structure of a binary format; compiling second source codes into second compiled codes at the first computing system, wherein the second program suite includes the second compiled codes; transferring the second computing task, the second program suite, and first context information from the first computing system to a second computing system; and executing, in parallel with the first computing task, the second computing task on the second computing system to produce second results, the second results comprising: a second modified data stack produced by executing the second code library on the second data stack, wherein the second modified data stack comprises a second tree structure of the binary format and the second results comprise only changes in the second modified data stack over the second data stack; and transferring the second results from the second computing system to the first computing system; and completing the service request at the first computing system by merging the first tree structure of the first modified data stack of the first results with the second tree structure of the second modified data stack of the second results based upon second context information.