PokerTracker

How to create?

You can't get the time in seconds, but there is an HH:MM stat available for free download from the Customize PokerTracker called "Session time H:MM" (cash or tournament), posted by me.

I know about "session time H:MM", but I play heads up sng hyper turbo where a lot of matches are finished in less than 1 minute (sometimes in few seconds), but PT3 show it as 1 minute. How it is in PT4?

There is no "Sessions" section of stats in PT4 - the only collection of hands is in the Player section - which, since it is broken down into hands directly should mean you can get resolutions of less than a minute - but I have not tested this personally. Also: If you had a one hand tournament, how much time would you say that it took?

Yeah, I see "Start Time" and "End Time" are based on date when hand was started. So in one hand tournament, stats "start time" and "end time" show the same hh:mm:ss. That would look like, the tourney was played in 0 seconds, even if the hand was played in 10 sec or more.

Right but we have no other data for that tournament beyond the one hand. If we have two hands we have the time between the two hands to use to calculate. With just one hand we have only the one data point though which complicates things.

I changed the column cnt_minutes expression (section: HoldemTournament Tournament) from

date_subtract_min[tourney_holdem_results.date_end,tourney_holdem_results.date_start]+1

to

date_subtract_sec[tourney_holdem_results.date_end,tourney_holdem_results.date_start]/60

and I used it to make custom stat to show tourney duration. The new stat shows more accurate time in minutes (like 3.2 min).

However, in a tournament with two hands, time is counted from the beginning of the first hand to the beginning of the second hand, losing the duration of last hand. The same with one hand tournament, where duration would be 0.
So we need add average length of the one hand to the column expression:

(date_subtract_sec[tourney_holdem_results.date_end,tourney_holdem_results.date_start]/60) + "average length of hand"

Obviously length of the hand should be in minutes with decimals: 15 sec will be 0.25, 1 min 06 sec will be 1.1 etc.

I recommend use it for players play very short tourneys.