RunnableParallel

RunnableParallel is a parallel execution component in LangChain Expression Language (LCEL) used to run multiple Runnable objects simultaneously and aggregate their respective outputs as a dictionary. Its core features include parallel scheduling of multiple independent tasks to improve execution efficiency, support for any type of Runnable as a sub-component, and a unified input distribution and output collection mechanism. It is commonly used for multi-path data processing, parallel retrieval, and branch execution in complex pipelines.