#' This function takes in a set of sequences and parses a similarity matrix to extract the similarity to a reference sequence. The resulting data is filtered to return only the similarity values for the reference sequence. The function supports parallel processing with multiple cores.
#'
#' @param seqs A DNAStringSet object containing the sequences.
#' @param seqs A named DNAStringSet object containing the sequences to compare to ref.
#' @param ref A named DNAStringSet object containing the reference sequences.
#' @param ncores An integer specifying the number of cores to use for parallel processing. Defaults to 1.