Required an Performance tuning at File sender adapter

Hi Experts,

We have a case in which we are facing some performance issue.

(File--> PI--> JMS), File sender is taking quite long time to pick & process the file.

We have changed the Polling interval time to 2 second but still we are facing the performance issue,

To process a file of size 1037B it is taking 13- 15 seconds.

Please let us know how can we increase the performance.

Also, is there any way where in we can specify the number of files to be picked & processed in a single Poll.

Thanks,

Farooq