in config/searchqa/default.yaml，train_size is 400，epoch is 4，batch_size is 40 ,so the step is 4*（400/40）=40，but docs/guide/first_experiments.md note that searchqa train process will cost just 30 min and the stop num is 8.
So what is the real default config of searchqa?
in config/searchqa/default.yaml，train_size is 400，epoch is 4，batch_size is 40 ,so the step is 4*（400/40）=40，but docs/guide/first_experiments.md note that searchqa train process will cost just 30 min and the stop num is 8.
So what is the real default config of searchqa?