better to send some-batch of msg-block, instead of sending msg one-by-on...

better to send small-batch of msg-block, instead of sending msg one-by-one?

i have no environment of kafka-0.7.2, so i can't test-against it
in kafka-0.8 msg-list packaged-into-one-block, and send once

you can treat it as pseudo-code ^_^