ToME: the Tales of Maj'Eyal

Is there anything I can do performance-wise to improve the time it takes to return to a previous point in the timeline, for example when Precognition fades?

I'd like to play PMs more but making effective use of Precog or other time-splitting effects is so irritating when it takes 30 seconds or more returning to an old point. It feels like it takes even longer than normal zone or game loading.

Maybe defragment your harddisk?

On further consideration, it looks like it is just a problem with the ID. Playing the main campaign, with or without the ID-500 addon, the load times on resetting the timeline are much better, almost instantaneous. (ID with and without the ID-500 addon is the same, slow.)

Although the ID floors are much larger, perhaps timeline-splitting effects are handled as efficiently in the ID as they are in the main campaign?

In which case I'm guessing it is storing the entire dungeon which is why it takes a while to recover it.

I considered that reason, though I'm not well versed in how the game handles various zones. Although there's only a single file in an ID save, compared to the campaign's various zones split into their own files, the filesize is no larger than an average zone - at least at the start, where the delay still exists even if all you do immediately after character creation is pop Precog then cancel it immediately.

Also, because I have terrible habit of leaving out whole, important, words, I must correct myself:

perhaps timeline-splitting effects are not handled as efficiently