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  1. Minecraft: Java Edition
  2. MC-180152

Manually placing lava underwater causes lag spikes since 1.13

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    • Icon: Bug Bug
    • Resolution: Cannot Reproduce
    • None
    • 1.15.2, 20w17a, 20w18a, 20w19a, 20w20a, 20w20b, 20w21a, 20w22a, 1.16 Pre-release 1, 1.16 Pre-release 2, 1.16 Pre-release 3, 1.16 Pre-release 5, 1.16 Pre-release 6, 1.16 Pre-release 7, 1.16 Pre-release 8, 1.16 Release Candidate 1, 1.16, 1.16.1, 20w27a, 20w28a, 20w29a, 20w30a, 1.16.2 Pre-release 1, 1.16.2, 1.16.3, 1.16.4 Pre-release 2, 1.16.4, 20w45a, 20w46a, 20w48a, 20w49a, 20w51a, 21w03a, 1.16.5, 21w05a, 21w08b, 21w10a, 21w13a, 21w15a, 21w16a, 1.17, 1.17.1 Pre-release 1, 1.17.1
    • Confirmed
    • Performance

      Manually placing lava underwater using a bucket will cause a lag spike. As you can see in the attached images, every lag spike is a lava block placed and transformed in obsidian underwater.

      Versions Thumbnails Versions Thumbnails
      1.12.2 1.17
      1.13.2 1.18
      1.14.4
      1.15.2
      1.16

      I have recorded a video showing the performance issue while executing a metric capture. Both of them can be found in the attachments.

      *1.18 UPDATE *
      As of 1.18 update the lag spikes have disappeared. Manually placing lava underwater using a bucket doesn't cause them anymore.

        1. 1.12.2.PNG
          1.12.2.PNG
          31 kB
        2. 1.13.2.PNG
          1.13.2.PNG
          120 kB
        3. 1.14.4.PNG
          1.14.4.PNG
          143 kB
        4. 1.15.2.PNG
          1.15.2.PNG
          126 kB
        5. 1.16.PNG
          1.16.PNG
          155 kB
        6. MC-180152 - Metric capture.zip
          276 kB
        7. MC-180152.mp4
          8.44 MB
        8. 1.17.png
          1.17.png
          147 kB
        9. 1.18.png
          1.18.png
          25 kB

            Unassigned Unassigned
            TheGabro TheGabro
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              Created:
              Updated:
              Resolved:
              CHK: