Optimize the collision hitbox of chairs.

[abovearth]

The chairs are getting the shape calculated exactly, which in my opinion isn't exactly necessary. Is it possible to optimize the collision hitbox, such that mobs colliding with the chair take up less cpu time?

From a spark profile I ran:

or as text:
Server thread7.30%22918.61ms

com.mrh0.buildersaddition.blocks.Chair.getShape()7.20%
    com.mrh0.buildersaddition.blocks.Chair.getLegsShape()3.78%
        net.minecraft.world.phys.shapes.Shapes.or()3.75%
            java.util.stream.ReferencePipeline.reduce()3.75%
                java.util.stream.AbstractPipeline.evaluate()3.75%
                    java.util.stream.ReduceOps$ReduceOp.evaluateSequential()3.75%
                        java.util.stream.AbstractPipeline.wrapAndCopyInto()3.75%
                            java.util.stream.AbstractPipeline.copyInto()3.75%
                                java.util.Spliterators$ArraySpliterator.forEachRemaining()3.75%
                                    java.util.stream.ReduceOps$1ReducingSink.accept()3.75%
                                        net.minecraft.world.phys.shapes.Shapes$$Lambda$1355.0x00000008011c97a0.apply()3.74%
                                        itable stub (native)0.00%
                                    itable stub (native)0.00%
                                itable stub (native)0.00%
        com.mrh0.buildersaddition.blocks.Chair.getLegShape()0.02%
    net.minecraft.world.phys.shapes.Shapes.or()3.42%
    com.mrh0.buildersaddition.blocks.Chair.getBackShape()0.00%