The decoding speed about BP algorithm and BP algorithm using distillation. The decoding speed of BP algorithm using distillation reaches 0.68 Mbits/s in an Intel Core i5-8400 CPU, which is better than BP algorithm. The decoding speed reaches 23.8 Mbits/s in an NVIDIA Tesla K80 GPU. The blue columnar bar represents the decoding speed mentioned in Ref. [4].