The total time depends on the amount of data you want to send.
If the data is large enough,then
Circuit Switching Time: Circuit Setup Time+ Transmission Delay+ Propagation Delay+Tear Down Connection Time.
Extra Factor is: Circuit Setup Time & Tear Down Time
Packet Switching is Store and Forward Mechanism, so at every hop transmission and propagation delay time is included
Packet Switching Time: (No of HOP X Transmission Delay)+(No of HOP X Propagation Delay)
Extra Factor is: Number of Transmission and Number of Propagation.
Conclusion:
For Circuit Switching:
If message size is very big, in compare to message transmission time the circuit setup+circuit tear down time is very less.
If message size is small, in compare to message transmission the setup time going to hurt the efficiency.
For Packet Switching:
If message size is very big, then for each packet transmission and propagation at every hop is going to be huge .
If the data size is small, compare to setup time, the transmission time is going be less in total.
So, the Total Time Depends on the size of the message .