Struct ConnectionCostMatrixLoader 

pub struct ConnectionCostMatrixLoader {}

Loader for connection cost matrix data from disk files.

Implementations

impl ConnectionCostMatrixLoader

pub fn load(input_dir: &Path) -> LinderaResult<ConnectionCostMatrix>

Load connection cost matrix from a file in the specified directory.

Arguments

• input_dir - Path to the directory containing matrix.mtx.

Returns

A ConnectionCostMatrix loaded from the file.

pub fn load_mmap(input_dir: &Path) -> LinderaResult<ConnectionCostMatrix>

Load connection cost matrix using memory-mapped file.

This is the zero-copy path: an mmap base is page-aligned and matrix.mtx already stores its costs as little-endian i16 in the in-memory layout, so ConnectionCostMatrix::load views the payload in place instead of decoding it into an owned Vec<i16>. Loading is O(1) in the matrix size and costs no anonymous memory; the pages are faulted in lazily as tokenization touches them. UniDic’s matrix alone is 71.5 MB, so this is the bulk of that dictionary’s load cost.

Arguments

• input_dir - Path to the directory containing matrix.mtx.

Returns

A ConnectionCostMatrix loaded via memory mapping.