I suppose it depends how big it is.? I start most of my shrubs, bushes & trees off in containers when they are small
Mine was in a pot to start off with but decided to plant it in the back border as I just love the fiery red foliage come Autumn . Must admit it's fared better in the ground though.
You can restrict the size of the alatus by pruning in late winter but I wouldn't say it needs a great deal of room. I've only pruned it once. Mine doesn't appear to be a fast grower - I think mine is a Compacticus From what I remember anyway.
We had one in a large tub for about 4 years, it went into the garden about 18 months ago. It hasn't "taken off" just solid gentle growth (but we are a long way north!) I love them.