MC-54888World suddenly turned very laggy
I've been having a creative world I use for quite a while for different testing in redstone. I created this world when the 1.8 snapshots have started to release. I haven't got the strongest machine, but I've never experienced lag on this world. I'm not sure this is the cause, but as far as I can tell, ever since opening this world in 14w19a, I has been getting a lot of lag. This shows a bit in FPS, going down by about 5 (from 30 to 25), but mostly in redstone contraptions. A repeater on one tick takes about a second to light up, from the moment I connect it to a redstone power source. If I activate a more complex machine, in which a few things happen at once, the world just freezes, changing from one frame to another every few seconds, and I can only hear the sound of the pistons firing, letting me know something is happening. After I noticed that, I tried to open the world back in 14w18b, and this bug keeps happening in that version as well. However, I was not able to reproduce this bug in other worlds.
Environment
Windows 8.1 Update 1, Java Version 7 Update 55 (build 1.7.0_55-b14)
Linked Issues
Created Issue:
World suddenly turned very laggy
I've been having a creative world I use for quite a while for different testing in redstone. I created this world when the 1.8 snapshots have started to release. I haven't got the strongest machine, but I've never experienced lag on this world. I'm not sure this is the cause, but as far as I can tell, ever since opening this world in 14w19a, I has been getting a lot of lag. This shows a bit in FPS, going down by about 5 (from 30 to 25), but mostly in redstone contraptions. A repeater on one tick takes about a second to light up, from the moment I connect it to a redstone power source. If I activate a more complex machine, in which a few things happen at once, the world just freezes, changing from one frame to another every few seconds, and I can only hear the sound of the pistons firing, letting me know something is happening. After I noticed that, I tried to open the world back in 14w18b, and this bug keeps happening in that version as well. However, I was not able to reproduce this bug in other worlds.
Environment
Windows 8.1 Update 1, Java Version 7 Update 55 (build 1.7.0_55-b14)
relates to
duplicates
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Confirming. Unusually strong lag occurs, mostly when I'm flying around in creative and rapidly drop altitude or something.
It's just part of the snapshots. They are not very stable, and because of that, things like this happen a lot. This is also a reason why snapshots are made, people can report these things, so they can remove them for the release.
There's some ongoing optimization work that should hopefully hit sometime in the next few weeks. This bug should probably stay open until the optimizations go into a snapshot, at which point lag can be re-evaluated to see if it's still there.
Well, something unexpected just happened. I have discovered that my entire world was full with invisible WIther Skulls, and once I got rid of them the lag has gone. However, as far as I can recall, this appeared only after updating to the 14w19a snapshot, so it is either a coincidence or it is a very wired bug...