i had basically told my villagers to convert everything made out of wood in the entire village to stone, roofs, floors, walls, etc., about 10 or 11 buildings, i think that's what may have been causing it, now that ~90% of it is done it's running very smooth and fast again.
Having a lot of blueprints placed is another thing which, in the live version, may cause lag. So, that makes sense.
Here's my answer from the Steam forums:
The two most common causes of lag are:
1) You have thousands of items that are being checked for zoning or blueprints.
-You can easily fix this be deleting the items you don't need from the inventory (I) panel.
2) There's some error occurring under the hood.
-As it is an early access game, this has happened for a few people. Not much that can be done, unfortunately as you wait for the next patch to fix these issues.
Pathfinding isn't usually the cause of the problem because I have a pathfinding queue. 30 entities should be fine.
Sometimes simply reloading your save can fix the problem if it's some internal error. Worth a shot.
Anyway, sorry you're experiencing this lag. The next update has maaaaany fixes for lag but it's not quite ready to be released.
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Agreed! And that's what I intended but I'll need to dedicate more time towards it once I've finished up this current update.