vangel76andClaude Opus 5.5 2ee261c0e8 perf(model): move whole rows when inserting or deleting rows and columns (#3575) ...

CellStore::shift_rows, shift_cols, shift_cols_in_rows and take_range removed
and re-set every affected cell one by one. They now take whole row maps (or
the split-off part of one) out of the bands and put them back at their new
position, so a row shift costs a few map operations per row instead of a
band lookup, a remove and a set per cell. take_range does this when the
block reaches the last column.

Behaviour is unchanged, including blank cells left behind by get_mut, cells off the grid (they
are still dropped, and still clear the cell they land on), cells shifted off
the sheet, and copy-on-write: bands without moved cells stay shared with undo
snapshots. A differential test runs 12,000 random operations against the old
per-cell code and compares contents, length, iteration order and band sharing.

shift_rows_in_cols, and take_range on a block with columns to its right, keep
moving cell by cell: the row-map version measured no faster there.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-11-08 03:51:57 +01:00

..

src

perf(model): move whole rows when inserting or deleting rows and columns (#3575)

2026-11-08 03:51:57 +01:00

Cargo.toml

Equations: Insert › Equation with a LaTeX editor, Office Math in xlsx and equations in PDF (#471)

2026-11-02 15:45:36 +01:00