jm £~èkÈÉ¢J¤~ÁÔ^¡ z±)VÞc÷> ÍèL«It should be the same complexity as normal sig verify but I guess you can put many of them in one TX. Otherwise Ryan's point about DSV being a subsidy doesn't make sense.
https://whatsonchain.com/tx/bbc674eaea67a316f42e4e4e650c21d228a6946502ee90bbde0c21e130fabee2