That's an option for a potential 2x boost, which I suppose could be good enough in certain contexts, but that's it. In particular, if you have a parser system a

That's an option for a potential 2x boost, which I suppose could be good enough in certain contexts, but that's it. In particular, if you have a parser system able to utilize SIMD for all parsing, that'll get arbitrary parallelizability for "free" (at the cost of some log(n) increase in total operations across all threads).