We believe that software should be

• simple
• unit tested
• fast
• granular

LazyBroadcast.jl helps us achieve via lazy_broadcast. See our documentation for a more in-depth dive into how it works.

The original implementation of LazyBroadcast involved a similar recipe to MultiBroadcastFusion, which has different yet justified needs for its implementation. Since then, DontMaterialize.jl was developed, which satisfied most needs by LazyBroadcast using a significantly more elegant approach, discussed here. So, we've borrowed that implementation in order to be more consistent with Base.Broadcast semantics, and provide users with less surprising behavior. We've also kept code_lowered_single_expression, as this is one feature that DontMaterialize.jl does not offer (transforming broadcasted Expr to Expr).