After exploring a newly generated world (or updating an existing world that has been explored) for about 400-500 blocks in any direction, block updates start to cause noticeable lag.
To recreate:
Create a new world
Explore for several hundred blocks in any direction
Try to break blocks or create a redstone clock
OR
Update an existing world that has been explored for several hundred blocks in any direction
Try to break blocks or create a redstone clock
Thank you for your report!
However, this issue is Incomplete.
Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.
Please review the guidelines linked below before making further reports.
In case of a game crash, be sure to attach the crashlog from
[minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/guides/finding-minecraft-data-folder].Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki