I came to the conclusion that I really wanted to implement object pooling for the Entity System, but I think I've hit two or three (or many more) snags along the way.
The more I try to add this feature to the ES, the more I realize I have to rewrite a good part of the compiler too (make it 80%). I have based the design of the ES upon different assumptions, and now stitching new stuff is proving to be very difficult.
Moreover, I'm not sure all of this will be eventually worth the effort.
So, as much as I'd love to release an ES with an object pool, I don't seem able to pull it off with the current design. It'll have to wait for a new ES version, when perhaps I'll have the time to rewrite it from scratch. This will also mean I'll break the compatibility with assemblies produced with the old compiler.
Edit: hell, since I love to rewrite code, I think I'm going to redo the compiler from scratch, this time taking in account everything. I haven't been analysing the problem at hand enough, and that's the result! Don't follow my example! ç_ç/