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  1. Minecraft: Java Edition
  2. MC-63896

High CPU load on superflat


    • Icon: Bug Bug
    • Resolution: Fixed
    • Minecraft 1.8-pre1
    • Minecraft 14w30c, Minecraft 14w31a, Minecraft 14w32a, Minecraft 14w34c
    • 2.54 GHz Intel Core 2 Duo
      NVIDIA GeForce 9400M 256 MB
      Mac OS X (x86_64) version 10.9.4
      Java Version: 1.6.0_65, Apple Inc.
      Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
    • Unconfirmed

      Running a single player flat world, I noticed a constant high CPU load (around 140% of core cycles) from minecraft and, indeed, it couldn't keep up 20 TPS. Using the speed of items through a hopper, I measured it to be running at about 7 TPS. Upon pausing the game, the CPU load drops substantially. I used all minimal video settings including 2-chunk render distance. If I bring up the debug profiler pie chart, it changes very little when pausing the game which leads me to believe it's a server-side issue. FPS remains as good as it has always been.

      If it helps, I tested the snapshots dichotomically and found that the issue appears in 14w25b.

      Also tried with Java 7 and 8 for same results.

            Unassigned Unassigned
            eah Evan A. Haskell
            3 Vote for this issue
            3 Start watching this issue