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  1. Minecraft: Java Edition
  2. MC-63896

High CPU load on superflat

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    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Fixed
    • Affects Version/s: Minecraft 14w30c, Minecraft 14w31a, Minecraft 14w32a, Minecraft 14w34c
    • Fix Version/s: Minecraft 1.8-pre1
    • Environment:

      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.

    • Confirmation Status:
      Unconfirmed

      Description

      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.

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              • Assignee:
                Unassigned
                Reporter:
                eah Evan A. Haskell
              • Votes:
                3 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: