Question about llDialog, Listen, timer and lag

I have a question about llDialog, Listen , Timer and Lag.
I don't have a script problem with it but want to understand it better.

Situation 1:
Touch_event
- Start timer 60 seconds
- Set llListen
- Set llDialog

Listen
- handle menu options
- Remove Listen

Timer
- Remove Listen in case user used ignore button

Situation 2:
Touch_event
- Set llListen
- Set llDialog

Listen
- handle menu options
- Remove Listen

I think situation 1 is better in cases when the script is only touched few times a day or less.
And situation 2 is maybe better when the script is touched lot of times a day.

Maybe its better to have a listen_event 'open' when the user click on the Ignore button of llDialog then use a timer_event to close it. I read timer-events causes lot of lag.

Am i right with this?
Or is there a better way to close a Listen after the user touch Ignore?

Thanks in advance

Instead of building and tearing down listens all day, you could use llListenControl to make it trigger events or not as needed.

There is going to be a certain amount of overhead for every event that gets triggered. A timer isn't a bad thing at all, if it stops you from processing listens that you are going to discard anyway.

Thanks Victoria,

i didn't know that command.
If i read the lslwiki correctly then i use llListenControl in stead of llListenRemove.
the situation will then look like:

State_entry
- Set llListen

Touch_Event
- llListenControl(handle, true)
- Set llDialog

Listen
- handle menu options
- llListenControl(handle, false)

But in case the user click on Ignore the listen_event will keep 'Open'.
Is it better to let is open or close it with a timer event?

I mean in case the script is touched often a day (15 times a hour or more).