mlx_lm       sync-eval decode 370.4 tok/s   async 468.7 tok/s
titan_fast   sync-eval decode 380.3 tok/s   async 479.0 tok/s
titan_ident  sync-eval decode 384.6 tok/s   async 475.9 tok/s
titan_i32    sync-eval decode 365.2 tok/s
titan_map32  sync-eval decode 352.2 tok/s   async 469.4 tok/s
dtype of mlx-lm indices: mlx.core.uint32