[klauspost]

In my experience, the hybrid approach is practically better due to cache locality anyway, so I don't think even native GF16 or GF32 would be of much help.

FWIW, I've ported rs-leopard to Go and found it very effective, except in the "recover one" scenario, where it is only at 50% speed of the "recover all" scenario, since it has to do several reconstructions to get one output. But even so, I am not too sure it would be much better with plain GF16, since you would still need to touch most shards to get one shard out.