>Why hasn't this been done by anyone yet? I used to do Java apps which didn't allocate memory in the long run, and so did some banks for high frequency trading

>Why hasn't this been done by anyone yet? I used to do Java apps which didn't allocate memory in the long run, and so did some banks for high frequency trading, by reusing objects on the spot or using pools for objects with a life cycle. It imposes some programming style/patterns, in particular for APIs design, but it's perfectly doable, so I guess people prefer to just do that. In what context that wouldn't be enough? For proof?