Using the new IBufferedFileStream class for faster game saving.

[intorr]

Paired pull request for ianpatt/common#6

[AlexanderKomi]

There is this SKSE mod which honors this pull request: https://www.nexusmods.com/skyrimspecialedition/mods/163969

I think it would be a good idea to merge this for faster loading in generell.

[intorr]

I looked at the source code for this plugin.
I'm not sure I'm qualified enough to rewrite all the algorithms it uses from D to C++.
The only truly interesting thing I saw there was the parallel loading/saving of plugin data.
But is this really necessary?
Parallelism is interesting and can speed up data processing, but it also carries a lot of risk.
With the thousands of records that plugins write in cosave, I don't notice any slowdown when saving or loading the game.
How much will parallel processing speed up saving and loading?
I don't think the increased code complexity is worth it.

[AlexanderKomi]

Ok, thanks for taking a look at the plugin.
I think its a healthy approach to exclude unnecessary complexity.