GC behavior

[Jonathan via Digitalmars-d]

Kiith-Sa, thanks for the info! I started to check out your entity 
project and love how your incorporating threads and syncing 
new/old state. You did state that your cleaning up things, but my 
initial reaction is that entitymanager is performing too many 
roles. I'd remove the heavy game state and threading into another 
class to make it cleaner, imho.

https://github.com/kiith-sa/tharsis-core/blob/master/source/tharsis/entity/entitymanager.d