adjust iteration time properly
adjust iteration time properly

funguito/Sia-GPU-Miner,KlausT/Sia-CUDA-Miner,funguito/Sia-GPU-Miner,KlausT/Sia-CUDA-Miner,NebulousLabs/Sia-GPU-Miner,visvirial/Sia-GPU-Miner,visvirial/Sia-GPU-Miner,NebulousLabs/Sia-GPU-Miner