pub const BUDGET: usize = _; // 1_048_576usizeExpand description
How many cells the fit may look at before it stops pairing things up and gives everything left a cell of its own.
See the note on how big it is allowed to get in the module documentation. One unit is one thing compared against one cell, which is what costs. The largest function in the corpus spends an eighth of this, so the budget is a guard against a generated file rather than something the ordinary path meets.