LAUNCHCC3235MOD: Issue with TCP server and TCP client socket communication.

PART NO - LAUNCHCC3235MOD
CCS software version -  10.3.1.00003 
Jumper are placed in default settings as per the CC3235MODSF SimpleLinkTm Wi-Fi® and IoTSolution With MCU LaunchPadTm Hardware user's guide.

Using SDK example project network terminal, we are working on TCP server and client socket communication.
Considering the CC3235SF module has TCP client and PC has TCP server.
We are passing 1024 bytes each time in Sl_send function.
When we send a total of 161792 bytes, which is 1024 * 158 in a loop. We are able to receive data in 400 milliseconds.
but when we send a total of 168000 bytes, to receive data it is taking approximately 4.8 seconds.
Please help us to resolve this issue.