mojira.dev
MC-190717

Trader Llama pathfinding can cause significant ticktimes

Hello,

I have noticed that in some chunks of my game , the game "increase drastically" the ms ticks

the value increase as soon as a switch from a normal chunk to a problematic one. ( always > 140 when there is an issue and always < 50 when there is not)

As far as i understand, This high value generate several bugs in the impacted chunks : minecart extremely slow and laggy, mining bug ( the mined block reapear for 1 or 2 sec ) , red stone timers are not working etc.. ). general behavior is that the chunks seems very laggy. 

some chunks are so impacted ( >200 ) that the game is unplayable .

I saw that there issue have been reported for 1.14 + ( MC-138550) but not for 1.15.2 that is why i post this one.

 

Edit : map loaded in 1.16 RC1: 

reduced in intensity : from  >200 => to 70/80 in the impacted chunks

i have done a new debug report.

game is playable , however difference is still clearly visible. btw the chunks impacted and those that aren't. ( ms tick value is *2 ) 

Nb : I checked as i was thinking that it might affects the "most transformed" chunks vs the untouched , but seems not related ( some impacted chunks were not modifed since generation at all) 

 

Environment

GEforceGT 650M/PCIe/SSE2
8GB ram ( 4 GB allowed to minecraft)
CPu: 8x core I7 intel
Java : 1.8.0 64b

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Comments 17

Could you please try and reproduce this in 1.16 Release Candidate 1?

ok i will load my game in 1.16 rc1 and check if the same chunks are impacted

done : i have edited initial report with results in 1.16 RC1

Please also run /debug report and attach the debug report found in [minecraft/debug/debug-report-<DATE>.zip|https://minecrafthopper.net/help/guides/finding-minecraft-data-folder].

This issue has been temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.

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7 more comments

Lama traider murdered with no pity ( and animal as well )😉

in 1.16.1 : there is indeed difference : game is less laggy ( but as the effect was not "so" annoying, i tried confirmation in 1.15.2) , the  effect in this version is immediatelly visible : no more lags , value of ms tick drops to 30 ( equivalent to when there is no problems) 

So the lama traider seems to be the bad guy in my game ^^ 

 

in fact i am a little suprised by your remark :

  • here seems to be either a large amount of trader llamas in your world, or the ones in your world's pathfinding is causing a lot of ticktime.

  • According to the debug report, there are only two trader llamas in the world. That's very odd.

I have never seen more than 1 lama traider . he was popping sometimes not far from me,

i have never added one by using eggs or something like that.

I thought only one could appear in the game

 

That was my mistake, I did not read the report correctly - I'm not sure what exactly what caused this behaviour, but I will leave this report open for investigation, however, we do need the world file from when the trader still existed uploaded to a third party host, and please then share the link to it in this report.

i have put my save in Dropbox,

i am not sure if it will work :

https://www.dropbox.com/s/x3hssaznt47t9f5/2020-06-20_15-48-55_Mon%20nouveau%20Monde%20%C3%A0%20Moi.zip?dl=0

 

Tell me when you got it ( if you got it) , so i can delete the link , thanks 🙂

 

Please check if that's still an issue for you in the latest 1.16.1 stable release or the latest 1.16.2 development snapshot.

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