Junos OS

Is there any way to check how long a packet being process by SRX?
Wanna check how long the traffic being processed from the packet coming into SRX, filtered by the security policies etc, until its coming out from the SRX to the neighbour devices.

I can see the Duration from security flow session and Elapsed-time from session-init & session-close log, but I think Duration and Elapsed time is the amount of time the session was active, not the amount of time SRX process that packet.