> This is the *design* process for a language, and it's important... Stepping back to reconsider how collections work generally, and how we can improve them in a graceful way that leads to a clean end-state, would be very valuable.
Though you have much more experience with internals than I do, I think that building a consensus around a bold new vision for PHP collections would be a near-Sisyphean task. Adding a list/vector type would be a much smaller, more easily definable task – it was one of the first new types that Hack added, and by all accounts they're pretty happy with that decision. > Should we also be adding a dedicated dictionary type as well? Maybe? I think there'd be less to gain from a performance standpoint though, so I didn't want to lump that in with any list proposal and risk derailment.
