Module row_vec 

RowVec - Cached row vector for zero-allocation table scans

This type wraps Vec<(i64, Row)> and returns it to a thread-local pool on drop. Uses a capacity-aware pool with best-fit allocation for efficient buffer reuse.

Pool Design:

• Sorted by capacity (ascending) for O(log n) best-fit search
• 16 slots to handle concurrent usage patterns
• Best-fit allocation: returns smallest buffer >= requested capacity
• Smart eviction: keeps larger buffers which are more versatile

Structs

RowIdVec

Cached row ID vector that returns to thread-local cache on drop.

RowIdVecIntoIter

Owning iterator for RowIdVec.

RowVec

Cached row vector that returns to thread-local cache on drop.

RowVecIter

Draining iterator that preserves allocation for cache reuse. Uses ptr::read for zero-allocation iteration - no dummy rows created.

Functions

clear_row_id_vec_pool

Clear the thread-local RowIdVec pool, releasing all cached buffers. Call this when dropping a database to prevent memory retention.

clear_row_vec_pool

Clear the thread-local RowVec pool, releasing all cached buffers. Call this when dropping a database to prevent memory retention.