Function parallel_map_reduce 

pub fn parallel_map_reduce<D, T, M, Red>(data: D, mapper: M, reducer: Red) -> T
where
    D: Send + Sync,
    T: Send + Clone,
    M: Fn(D) -> T + Sync + Send + Clone,
    Red: Fn(T, T) -> T + Sync + Send,

Parallel map operation on array data with chunking

This function processes array data in parallel chunks using the provided mapper function.

Arguments

• data - The data to process (e.g., array view)
• chunk_size - Size of each chunk for parallel processing
• mapper - Function that processes a chunk and returns a result
• reducer - Function that combines two results into one

Returns

The final reduced result