I use flushing mob farm. But once i activate them they start making massive lag since 15w49. FPS doesn't fall while lagging but mobs and actions start lagging like less than 1fps.
I'm thinking water flow (or new pathfinding) causes lags but not sure.
At least there are lots of water flows when they start lagging.
This never happens on 15w47 or earlier.
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kumasasa
Memory: 412819936 bytes (393 MB) / 1060372480 bytes (1011 MB) up to 1060372480 bytes (1011 MB)
You're low on memory.
Please assign more memory to Minecraft (see MC-12949) and retry.
migrated
Memory doesn't matter. I've turned off my ram disk and tried with 16gig memory ago. Remain the same...
As i said this issue doesn't happen on 15w47 or earlier.
Also I've tested in creative mode on 15w51a with massive lava/water flows and mobs but the lags never happens.
kumasasa
Ok, was worth a try.