Struct BakingScratch 

pub struct BakingScratch { /* private fields */ }

Caller-owned reusable scratch buffers for bake_rows_into_template.

The merge needs five intermediate buffers, all sized from the inputs of the current call. Constructing one BakingScratch and passing &mut to every bake reuses these allocations: each buffer is clear()-ed and re-grown at the start of a call without ever calling shrink_to_fit, so at steady state (once the largest seen template/batch has been processed) a bake allocates no temporaries.

The fields are private; the struct is an opaque buffer bag. The buffers are, in element type and per-call length:

• cut_nz_per_col: Vec<u32> — length num_cols; per-column count of CSR contributions (count pass).
• col_list_start: Vec<u32> — length num_cols + 1; prefix-sum column-offset table into the flat CSR-grouped buffers.
• col_list_row: Vec<i32> — length rows_nnz; flat row-index buffer grouped by column.
• col_list_val: Vec<f64> — length rows_nnz; flat value buffer grouped by column.
• write_cursor: Vec<u32> — length num_cols; per-column write offset within the flat buffers.

Implementations

impl BakingScratch

pub fn new() -> Self

Construct an empty scratch. All buffers grow lazily on first bake.

Trait Implementations

impl Debug for BakingScratch

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BakingScratch

fn default() -> BakingScratch

Returns the “default value” for a type.