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improvise/crates
Edward Langley 51a61f4b17 improvise-kimw: derive a view's grid once per borrow, not once per question
App::grids() memoises the named view's layout for as long as it borrows the
App: once for a whole frame check, once in model_effects. A frame of n writes
to another view's empty records now derives 1 + 2n grids instead of about 5n.
Empty-record ClearCell on 18k cells with a formula, M4 Max: 1.44s -> 0.66s.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
2026-09-23 18:36:41 -07:00
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