The latest Minecraft 1.13 snapshot is lagging really bad compared to 1.12.2 and other 1.13 snapshots and takes up over 250% of the CPU (the most I found it at was ~260-270%) which makes everything pretty much unusable.
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Please check if that's still an issue in 1.13pre-1. If so, please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report (minecraft/crash-reports/crash-<DATE>-client.txt) here.
I still have this issue, I just haven't responded in a while, it's been sitting in my mail unread! 😛
I can get up to 1000% CPU usage in 1.13-pre7. I have attached the crash report:
[media]and a few screenshots of insane CPU usage.
[media]
NOTE: I am on a MacBook Air.
To above comment:
Your computer does not meet the minimum specifications.
The CPU is underpowered compared to the minimum spec, probably because it is a U (low power) version.
Your computer does not meet the minimum system requirements to run Minecraft.
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Still affects 18w15a. Right now, the highest numbers I've gotten are up to 180% on a super flat world, and up to 220% on a normal world.