Improve performance with smart call stack depths

[marcus-pousette]

with #18 call stack depth is reduced so that huge arrays can be deserialised into. This creates a slight inefficiency for small class deserialisation, where call stack depth is not a problem.

I more performant solution would be:

• For non arrays, call stack depth should grow
• For arrays (large ones): Call stack depth should reset to prevent "Maximum call stack size exceeded" errors (and overall improve performance of the application)