Difference between revisions of "Papyrus FAQs"
→Are While loops safe to use for persistent or continuous effects?
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=== Are While loops safe to use for persistent or continuous effects? === | === Are While loops safe to use for persistent or continuous effects? === | ||
According to SmkViper: | |||
<pre> | |||
Saves operate generally the same way they did with Skyrim. Any running threads | |||
are saved so they can be resumed when the save is loaded. This means any while | |||
loops running will be saved into the save game, because of course they need to | |||
continue running when the save is loading. However because they are saved, any | |||
patch to the function that you release in a mod can't be applied to that thread | |||
until it exits the function (which means the while loop has to end). | |||
While loops also keep the thread alive, which consumes some memory, as the | |||
thread and all its stack data and calling functions stack data need to stick | |||
around. If you end up with >100 threads running at once for over a few seconds, | |||
Papyrus assumes something is wrong and starts spitting out stack dumps to the | |||
log so you can find and fix the problem. If the while loops aren't sleeping (via | |||
Wait or some other latent call) they can contribute to script lag as the VM has | |||
to take time to process the thread in addition to everything else it's running. | |||
Timers replace OnUpdate partially in response to the problems with continual | |||
update event registrations (they are equivalent to single update registrations). | |||
And because it's sometimes really handy to have multiple timers going at once on | |||
different intervals. | |||
So yes, if you need something running over a long period of time, you should be | |||
using timer events. | |||
All that being said, F4's version of Papyrus is much more aggressive about | |||
cleaning out dead data if things go... missing. Not that any self-respecting | |||
modder would do that. | |||
</pre> | |||
=== How do I write save-safe scripts then? === | === How do I write save-safe scripts then? === | ||
=== How would I emulate a Break statement in a While loop? === | === How would I emulate a Break statement in a While loop? === | ||