Huge message size coming from ECC

Hi Experts,

   We have a scenario where our sender is ECC and receiver is a third party system. ECC is connecting to PI through proxy. We are receiving a huge volume of data nearly around 500-700 MB from ECC. The message is taking more than 20 minutes to process the message from integration engine. Is it possible to process the message in few minutes like processing the message in around 1- 5 minutes.

Thanks in advance.

Thanks,

Srinivas.