SpeechX Performance

Speechx RTF 以及 CER 测试. 实验测试集说明： 基于Aishell testset 7176utt上实验，单线程单条顺序测试 总的音频时长：36108.9 s 模型为 ds2 linear feature， cer 7.8% https://paddlespeech.bj.bcebos.com/s2t/aishell/asr0/asr0_deepspeech2_online_aishell_ckpt_0.2.0.model.tar.gz 脚本为：https://github.com/PaddlePaddle/PaddleSpeech/tree/develop/speechx/examples/ds2_ol/aishell cpu：cpu MHz : 2599.998

实验结果：

	RTF	CER
paddlespeech export test.sh	0.648	7.8%
ctc beam search without giga lm	0.576	16.14%
ctc beam search with lm	0.571	7.8%
TLG decoder with aishell lm	0.853	11.14%