Performance Considerations

Prefer BreakifyValue for discrete design-system changes and use BreakifyFluidValue only where interpolation adds value. BreakifyResponsiveGrid calculates columns from local width, while BreakifyGrid uses an explicit responsive column count.

For grid height modes, equalInRow is lazy and generally cheaper for long lists. equal measures all cards on layout and width changes, so reserve it for grids that need one height across every row. natural avoids intrinsic equalization but cannot support unbounded-height children such as Spacer or Expanded.