Why is one core docker container better than four cores docker container ?

[luoyger]

I had started an one-core docker container and a four-cores docker container, and test by 100 batch data and the same QPS. The model is recommend domain model.

resource	pod num	p99(ms)	p95(ms)	p80(ms)	avg(ms)	total cpu num	cpu improve
4c2g	87	13.06	9.63	8.11	5.03	348
1c2g	219	9.95	9.55	8.04	5.03	219	37.1%

I want to know why one-core tfserving deploying is better than four-cores ? more cores should be better ?

At the same, I configured the batching config file, changed all params value below, it did not make any difference, I am not sure I had configured it by the right way. Can someone tell me how to adjust these params to make sense ?

max_batch_size { value: 1000 }
batch_timeout_micros { value: 0 }
max_enqueued_batches { value: 1 }
num_batch_threads { value: 1 }