setPreferenceForKey() -> ¿Performance impact? ¿Limitations?

[alaresa]

We are trying to develop a widget that may need to save considerable amounts of data, and I was wondering if the S60's preference for key method, had any type of limitations.
We're developing quite a lot of widgets, and time is an issue, that's why we're considering the possibility of using the Widget's setPreferenceForKey() just as it was a small database.
But before doing that we need to know about any known limitations for these preferences, so any feedback would be really appreciated.

- Limited number of keys ?
- Limited length for a key's value?
- System/Widget performance problems with large amount of keys?

Alejandro.

[nutan_ce]

HI Alejandro,

Did you get any further information on setPreferenceForKey() limitations?

[alaresa]

I'm afraid not. Anyway we had to develop the widget anyway, and currently it's the only way available we discovered. So if you was searching for some light at the end of the tunnel, I can't be too helpful.

Even though, we're still interested if anyone has some more information about the subject, it would be really appreciated.

Thanks in advance.

[quangtrung89]

Yes, I have some question like you, and moreover I am surprised which data structure is using for storing the PreferenceForKey, what is it, RAM or anything else... I think it is not RAM because I try to turn off phone and take off battery the saving records are still there. Do you have any ideas.

[peppe@peppe.net]

Yes, I have some question like you, and moreover I am surprised which data structure is using for storing the PreferenceForKey, what is it, RAM or anything else... I think it is not RAM because I try to turn off phone and take off battery the saving records are still there. Do you have any ideas.

Settings are stored persistently in a file used internally by the system which developers don't need ot know or care about.

[quangtrung89]

Settings are stored persistently in a file used internally by the system which developers don't need ot know or care about.

Wow, thank you very much Pepe, Now I see and do not need to care about overflow stack or memory .

[peppe@peppe.net]

Wow, thank you very much Pepe, Now I see and do not need to care about overflow stack or memory .

Whatever makes you happy.