david

have you tried bedrock

Can't confirm. I think you just tried building a golem with a regular pumpkin. That of course won't work. You need to place the pumpkin down and go by it with some shears first in order to get a carved pumpkin. 

Can confirm a crash on startup after updating to 18w22a snapshot. Attached my log.

if you make a world in 1.8.8, then open in snap, world is fine
EDIT: World becomes corrupt after, even, mobs without hotboxes and invisible any way

doesnt work for me either in windows 7 latest java update

Yes they have plugins. This is including the hive minecraft hunger games server.

Please fix this bug Its annoying as hell

i have this same issue with 1.6.2. they didn't fix the sprinting issue. only on servers.

@Lukas, so let's say some amount of profiling, editing and recompiling was involved. Besides that, you definitly demonstrated how to "revert" an engine. I think that's a contribution, that shouldn't be underestimated. Mojang really needs to adopt your approach on that issue. It would even be appropriate of them, to pay you a little money for doing their work or at least mention it in a tweet.

@Lukas Great job, works like a charm! I'm curious, was it more or less copy-pasting in an earlier version of the bfz.class or did it require some noticible code-plumbing from your side?
Anyway, @Mojang this is the way to go!

@Maarten Granted, the snow-idea from Ville was a blind shot, but let's be honest: who would have thought, that the clouds had any noticible impact on the performance? Afaik, these changes were made in order to work nicely with the beacon-beam. So, you never know. Every feature, that gets implemented needs to work with it's the environment as well. There doesn't necessarily need to be an actual snow-layer in sight, in order for some code-routine (be it hitbox-testing) to at least test if there is. So, I wouldn't throw the idea off the table so quickly. On the other hand: it's blind guessing - doesn't help the devs, doesn't even help us. I just wish they wouldn't prioritize this freaking release-date so much.

@Alex that is what already went into the 10b-snapshot, and turned out to be not the whole cure since Maarten first posted at 12:45PM about his experience with it 😉

First off, props to Jeb for investigating the case. Performance got noticibly better, but also - to join in, what Maarten said - "better" in a sense of less unplayable. I messed with the common options: render-distance, particle-effects, turing off the clouds etc. CPU-core-usages and RAM are nowhere near from beeing maxed out. It's still lagging. Maybe the cloud-changes weren't the only thing, that contributed to the performance-drops. Still, only turning off smooth lighting at all does the trick, but I believe what Jeb said, that it has nothing to do with smooth lighting.

So Mojang, now that 1.5 seems to be just around the corner, I'm getting concerned about you releasing a major update, without resolving this FPS-drop-issue. People were so kind to nail the first occurence of the bug between the snapshots of 13w04a and 13w05a. They did research on their own and provided enough stats for you to take care of it and face the fact, that this is not something individual or obscure, it's not caused by crappy hardware, or a virus or any other outer cause. No, it's reproducible - you can load up the 13w04a-snapshot and see everything running smooth and fine. People are getting suspicous when the new fallback-option for smooth lighting is said to be just the old engine, but remaining laggy performance states the opposite. Right now I doubt, that this issue gets the attention it deserves. So, just a reminder: please take care of it. Minecraft is a great game, and I appreciate the work that has been put into this, but if you release 1.5 without resolving the issue, you will definitly dissapoint customers. They are not into the snapshots, they are used to the performance of 1.4.7, and a good portion of them will be in for a laggy surprise. Please don't let it happen.

did you see the picture i did use 3 tnt minecarts!!!

hi! i have the same issue. before the 1.4.2, ut i don't remember.

here is the crash report:

---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 25/10/12 15:50
Description: Exception in server tick loop

java.lang.IllegalStateException: Entity is already tracked!
	at hz.a(SourceFile:67)
	at hz.a(SourceFile:45)
	at ia.a(SourceFile:24)
	at xe.a(SourceFile:786)
	at ie.a(SourceFile:553)
	at xe.d(SourceFile:778)
	at ge.a(SourceFile:355)
	at lb.b(SourceFile:1442)
	at alc.a(SourceFile:62)
	at lb.D(SourceFile:659)
	at lb.d(SourceFile:622)
	at pg.j_(SourceFile:69)
	at xe.a(SourceFile:1218)
	at ie.a(SourceFile:424)
	at xe.g(SourceFile:1197)
	at xe.h(SourceFile:1122)
	at ie.h(SourceFile:352)
	at net.minecraft.server.MinecraftServer.r(SourceFile:718)
	at net.minecraft.server.MinecraftServer.q(SourceFile:661)
	at bcb.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:595)
	at fp.run(SourceFile:818)

Relevant Details:
- Minecraft Version: 1.4.2
- Operating System: Windows 7 (amd64) version 6.1
- Java Version: 1.6.0_29, Sun Microsystems Inc.
- Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
- Memory: 280193600 bytes (267 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- AABB Pool Size: 2194 (122864 bytes; 0 MB) allocated, 2005 (112280 bytes; 0 MB) used
- Is Modded: Probably not
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 653 (36568 bytes; 0 MB) allocated, 164 (9184 bytes; 0 MB) used
- Player Count: 1 / 8; [ih['fjordbokna'/172, l='New World--', x=100,00, y=49,00, z=0,00]]
- World New World-- Entities: 96 total; [pm['Toudou'/7785, l='New World--', x=98,50, y=60,00, z=1,50], pm['Toudou'/7786, l='New World--', x=96,50, y=60,00, z=8,50], pm['Toudou'/7787, l='New World--', x=98,50, y=60,00, z=4,41], pm['Toudou'/7788, l='New World--', x=98,25, y=61,00, z=5,27], ih['fjordbokna'/172, l='New World--', x=100,00, y=49,00, z=0,00], pm['Toudou'/7792, l='New World--', x=-18,57, y=59,00, z=-44,89], pm['Toudou'/7796, l='New World--', x=-15,50, y=59,00, z=-53,50], pm['Toudou'/7797, l='New World--', x=-7,50, y=59,00, z=-48,50], pm['Toudou'/7798, l='New World--', x=-7,50, y=59,00, z=-50,50], pm['Toudou'/7799, l='New World--', x=-8,50, y=59,00, z=-53,77], pm['Toudou'/7800, l='New World--', x=-8,50, y=59,00, z=-52,50], pm['Toudou'/7801, l='New World--', x=-8,50, y=59,00, z=-51,50], pm['Toudou'/7802, l='New World--', x=-10,71, y=59,00, z=-50,89], pm['Toudou'/7805, l='New World--', x=14,62, y=61,00, z=-50,00], pm['Toudou'/7806, l='New World--', x=10,38, y=60,00, z=-59,36], pm['Toudou'/7807, l='New World--', x=14,46, y=60,00, z=-58,44], pm['Toudou'/7808, l='New World--', x=8,64, y=60,00, z=-51,95], pm['Toudou'/7809, l='New World--', x=5,69, y=59,00, z=-56,90], pm['Toudou'/7810, l='New World--', x=5,50, y=59,00, z=-52,50], pm['Toudou'/7811, l='New World--', x=9,88, y=63,00, z=-8,35], pm['Toudou'/7812, l='New World--', x=12,38, y=65,00, z=47,10], pm['Toudou'/7813, l='New World--', x=16,53, y=58,00, z=-82,29], pm['Toudou'/7814, l='New World--', x=28,26, y=60,00, z=-68,05], pm['Toudou'/7815, l='New World--', x=25,47, y=59,00, z=-69,55], pm['Toudou'/7816, l='New World--', x=28,80, y=64,00, z=-0,63], pm['Toudou'/7817, l='New World--', x=29,79, y=64,00, z=0,76], pm['Toudou'/7818, l='New World--', x=31,14, y=64,00, z=25,50], pm['Toudou'/7819, l='New World--', x=27,50, y=63,00, z=63,50], pm['Toudou'/7820, l='New World--', x=29,50, y=63,00, z=60,50], pm['Toudou'/7821, l='New World--', x=23,41, y=63,00, z=64,33], pm['Toudou'/7822, l='New World--', x=32,50, y=60,00, z=-68,50], pm['Toudou'/7823, l='New World--', x=33,50, y=60,00, z=-66,50], pm['Toudou'/7824, l='New World--', x=38,60, y=62,00, z=-25,53], pm['Toudou'/7825, l='New World--', x=43,70, y=61,00, z=-26,27], pm['Toudou'/7826, l='New World--', x=44,06, y=62,00, z=-10,71], pm['Toudou'/7827, l='New World--', x=37,45, y=65,00, z=6,90], pm['Toudou'/7828, l='New World--', x=46,75, y=62,00, z=46,98], pm['Toudou'/7829, l='New World--', x=52,61, y=58,00, z=-61,41], pm['Toudou'/7830, l='New World--', x=51,50, y=58,00, z=-62,50], pm['Toudou'/7831, l='New World--', x=53,04, y=60,00, z=-32,16], pm['Toudou'/7832, l='New World--', x=54,83, y=60,00, z=-33,86], pm['Toudou'/7833, l='New World--', x=59,50, y=60,00, z=-37,50], pm['Toudou'/7834, l='New World--', x=52,65, y=60,00, z=-34,49], pm['Toudou'/7835, l='New World--', x=63,56, y=60,00, z=-19,63], pm['Toudou'/7836, l='New World--', x=57,70, y=59,00, z=-28,87], pm['Toudou'/7837, l='New World--', x=63,90, y=60,00, z=-16,31], pm['Toudou'/7838, l='New World--', x=53,94, y=60,00, z=-25,44], pm['Toudou'/7839, l='New World--', x=51,18, y=63,00, z=-3,96], pm['Toudou'/7840, l='New World--', x=54,48, y=61,00, z=-13,62], pg['item.tile.stonebrick'/7841, l='New World--', x=100,00, y=50,13, z=0,00], pg['item.tile.stonebrick'/7842, l='New World--', x=60,88, y=64,13, z=-0,26], pg['item.tile.stonebrick'/7843, l='New World--', x=60,95, y=64,13, z=-1,17], pg['item.tile.stonebrick'/7844, l='New World--', x=60,63, y=64,13, z=-1,69], pg['item.tile.stonebrick'/7845, l='New World--', x=62,99, y=64,13, z=-0,36], pg['item.tile.stonebrick'/7846, l='New World--', x=62,88, y=64,13, z=-2,83], pg['item.tile.stonebrick'/7847, l='New World--', x=62,42, y=64,13, z=-0,35], pm['Toudou'/7848, l='New World--', x=48,16, y=64,00, z=-1,20], pg['item.tile.stonebrick'/7849, l='New World--', x=62,41, y=64,13, z=-1,40], pm['Toudou'/7850, l='New World--', x=54,51, y=65,00, z=10,60], pm['Toudou'/7851, l='New World--', x=54,62, y=65,00, z=14,88], pg['item.tile.stonebrick'/7852, l='New World--', x=60,69, y=64,13, z=1,13], pg['item.tile.stonebrick'/7853, l='New World--', x=60,62, y=64,13, z=0,66], pg['item.tile.stonebrick'/7854, l='New World--', x=59,45, y=64,13, z=0,21], pg['item.tile.stonebrick'/7855, l='New World--', x=62,21, y=64,13, z=0,26], pm['Toudou'/7856, l='New World--', x=49,58, y=65,00, z=13,99], pg['item.tile.stonebrick'/7857, l='New World--', x=63,24, y=64,13, z=0,13], pm['Toudou'/7858, l='New World--', x=79,49, y=61,00, z=-5,78], pm['Toudou'/7859, l='New World--', x=74,06, y=63,00, z=19,67], pm['Toudou'/7860, l='New World--', x=76,54, y=62,00, z=16,89], pm['Toudou'/7861, l='New World--', x=77,50, y=58,00, z=91,50], pm['Toudou'/7862, l='New World--', x=79,10, y=58,00, z=90,39], pm['Toudou'/7863, l='New World--', x=90,53, y=49,00, z=-82,39], pm['Toudou'/7864, l='New World--', x=83,29, y=31,00, z=-61,70], pm['Toudou'/7865, l='New World--', x=95,65, y=57,00, z=-43,91], pm['Toudou'/7866, l='New World--', x=87,07, y=58,00, z=-30,39], pm['Toudou'/7867, l='New World--', x=85,40, y=62,00, z=12,88], pm['Toudou'/7868, l='New World--', x=91,10, y=62,00, z=24,30], pm['Toudou'/7869, l='New World--', x=85,23, y=62,00, z=26,30], pm['Toudou'/7870, l='New World--', x=89,50, y=62,00, z=24,50], pm['Toudou'/7871, l='New World--', x=87,76, y=62,00, z=32,52], pm['Toudou'/7872, l='New World--', x=108,50, y=37,00, z=-73,50], pm['Toudou'/7873, l='New World--', x=98,53, y=57,00, z=-37,33], pm['Toudou'/7874, l='New World--', x=110,64, y=60,00, z=31,75], pm['Toudou'/7875, l='New World--', x=111,78, y=59,00, z=59,56], pm['Toudou'/7876, l='New World--', x=124,54, y=50,00, z=-51,61], pm['Toudou'/7877, l='New World--', x=116,24, y=51,00, z=-53,18], pm['Toudou'/7878, l='New World--', x=122,26, y=51,00, z=-52,30], pm['Toudou'/7879, l='New World--', x=119,55, y=59,00, z=-39,39], pm['Toudou'/7880, l='New World--', x=125,74, y=50,00, z=-26,23], pm['Toudou'/7881, l='New World--', x=136,59, y=49,00, z=-51,27], pm['Toudou'/7882, l='New World--', x=133,21, y=49,00, z=-43,74], pm['Toudou'/7883, l='New World--', x=136,50, y=39,00, z=41,50], pm['Toudou'/7884, l='New World--', x=143,50, y=57,00, z=66,50], pm['Toudou'/7885, l='New World--', x=143,08, y=57,00, z=64,13], pm['Toudou'/7886, l='New World--', x=132,38, y=49,00, z=74,99], pg['item.tile.stonebrick'/7841, l='New World--', x=100,00, y=50,13, z=0,00]]
- World New World-- Players: 1 total; [ih['fjordbokna'/172, l='New World--', x=100,00, y=49,00, z=0,00]]
- World New World-- Chunk Stats: ServerChunkCache: 442 Drop: 0
- Type: Integrated Server