Long time world 4+ years.  400mb in size. (now 950mb!)

Most recently, since 1.18 and definitely now in 1.19 the performance of the world has gotten worse.

such as hoppers taking ages to pass through items, digging with haste2/eff 5 causing the blocks to disappear and then reappear to have to be dug again. The main performance issue is when traveling from nether to overworld whole blocks of area are missing. You can see right through them to the other side. Cannot pass through them. If I wait five minutes or so they, most of the time sort themselves out however the recent trend is for the game to crash entirely when passing through a (very slow to react) portal. There have been a few occasions where on passing through I seem to get stuck in a block and die losing all gear which is frustrating.