[fruneau]

There's a moment when you realise you should avoid allocations because you discover that allocations are expensive. Then you also realise at some point that you cannot avoid some allocations (e.g. you need to perform some non-blocking networking) and because of the first point, you get a bit frustrated by this: you're forced to do something that is expensive.

That's exactly when you realise that you can get rid of that frustration if you introduce some complex caching, object pools or more complex structures. But the more complex it gets, the more frustrated you become (again). Finally, you end up writing something simple and efficient: a memory allocator that matches the exact allocation pattern of your use case... and you want to allocator to be as efficient as possible.