I'm not incredibly familiar with gamedev, but I would expect most allocations in games to be performed by small-object allocators on top of the general-purpose allocator, so the choice of general-purpose allocator should not make that much of a difference, should it?
You probably won’t get a 2x boost from it. But you might notice some improvements. It’s worth trying if you can test it quickly.
Software best practices are like flossing: good in the long term, but probably not crucial to keeping your bite.