I think I miscommunicated what I meant, there was an implicit assumption that copying value types over channels was bad due to GC overhead. Efficient Immutable

I think I miscommunicated what I meant, there was an implicit assumption that copying value types over channels was bad due to GC overhead. Efficient Immutable data structures let you have your cake and eat it too. You can avoid GC overhead by sharing structure but avoid problems with mutation between goroutines.