Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-42373

Redstone causes area specific FPS drop


    • Icon: Bug Bug
    • Resolution: Awaiting Response
    • None
    • Minecraft 1.7.1, Minecraft 1.7.2, Minecraft 1.7.3, Minecraft 1.7.4, Minecraft 1.8, Minecraft 1.8.1-pre3, Minecraft 1.8.8, Minecraft 15w43a, Minecraft 15w44b, Minecraft 15w45a
    • Confirmed

      Moderator Note

      This issue has been identified as being caused by redstone clocks usually within the 12x12 chunk area, causing a 1 chunk wide FPS drop area between the always-loaded and sometimes-loaded chunks. This behavior has also been described outside the always-loaded chunks.

      Not all clocks will cause this issue, and it is currently unknown why some clocks are affected and others are not.

      Redstone Hoppper Clock: Tested and Confirmed
      Redstone Comparator Clock: Tested and Confirmed
      Minecart Clock: Untested

      This may be caused by additional redstone devices, and may not be restricted to redstone clocks. Additional reports have been submitted describing the same behavior related to item frames now that they are redstone-enabled, and have been related to this ticket.

      Temporary Resolution:
      Disabling certain redstone clocks within the 12x12 always-loaded chunk will remove the lag. Note that not all redstone clocks will cause this issue, you must find the specific clock causing the problem and disable it.

      Server Recommendation:
      Do not build redstone clocks within this area until the issue is resolved. If clocks are required, after activating, verify that this issue does not appear. If it should appear try moving your clock.

      When playing on a sever hosted by a friend's computer AND single player (loading the world in both forms) areas of the map become "dead zones" by which I mean you cannot access them without your FPS dropping to 0. If you "escape" this areas your FPS boosts right back up to 60-70 (for me). Chunk loading drops to 0 also.

      These areas appear randomly and spontaneously around the 12 x 12 spawn area I suspect. They were not there upon world creation. When other people load the world up, they too find these areas and they can pinpoint the same areas like myself.

      Furthermore, I have used McEdit to try and delete all entities and check for chunk areas and I could not find a solution/resolve it. In summary this "Bug" seems to be unrelated to computer performance and is an actual ingame issue: It has a huge impact on a players area/creation as the FPS drop to 0 makes the area inaccessible. Logging in/out initially gives your FPS a boost to normal then within 3-5 seconds it drops again.

      This is not a global FPS performance issue but a very specific area issue.

            Unassigned Unassigned
            Nay7uk Nathan Flanagan
            27 Vote for this issue
            11 Start watching this issue