Garbage Collection and gamedev - tl;dr Yes we want it, so let's solve it
elronnd at elronnd.net
Wed Nov 25 08:32:37 UTC 2020
On Wednesday, 25 November 2020 at 07:54:57 UTC, Araq wrote:
> This problem -- if it really comes up -- is not part of the
> reference counting mechanism at all. Manual memory management
> with free() calls produces exactly the same effect.
That's not true. The problem with reference counting is that the
deallocation happens behind your back, and can be difficult to
reason about or occur inconsistently. With manual free calls,
everything happens explicitly, and you have more flexibility
All this aside the fact that, for games, automatic memory
management isn't competing with 'malloc', it's competing with
custom arenas. Where you can deallocate everything at once and
not have to worry about tracing an object graph.
Malloc is fairly slow as is, and the overhead of reference
counting on top of it is generally acceptable (esp. with
optimizations), but rc still has pathological cases.
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