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  1. Minecraft: Java Edition
  2. MC-123584

Updating blocks creates lag spikes proportional to geometry in chunk section

          Details

          • Type: Bug
          • Status: Open
          • Resolution: Unresolved
          • Affects Version/s: Minecraft 17w50a, Minecraft 18w01a, Minecraft 18w07c, Minecraft 18w09a, Minecraft 18w11a, Minecraft 18w19b, Minecraft 1.13-pre1, Minecraft 1.13-pre5, Minecraft 1.13-pre6, Minecraft 1.13-pre7, Minecraft 1.13-pre8, Minecraft 1.13-pre9, Minecraft 1.13-pre10, Minecraft 1.13, Minecraft 18w30b
          • Fix Version/s: None
          • Labels:
          • Confirmation Status:
            Confirmed

            Description

            The bug

            Any block change seems to trigger a redraw of the entire chunk section. This is most noticeable when breaking and replacing blocks, but is also caused by wheat growing, for example. Lag is increased depending on the geometry inside the chunk section – complex models like fences cause greater lag.

            This is client-side rendering issue since when filling large areas the command success message appears almost instantaneously in the log but the game freezes for some seconds.

            When the debug rendering pie chart is visible the following warnings are logged:

            [21:20:51] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer.level.terrain_setup.rebuildNear.build near' took aprox 223.112349 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer.level.terrain_setup.rebuildNear.build near' took aprox 1796.166532 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer.level.terrain_setup.rebuildNear' took aprox 2046.063861 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer.level.terrain_setup' took aprox 2046.184909 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer.level' took aprox 2049.560368 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root.gameRenderer' took aprox 2051.362563 ms
[21:20:53] [Client thread/WARN]: Something's taking too long! 'root' took aprox 2054.692309 m

            How to reproduce

            1. Use the following command 
              /fill ~1 ~1 ~1 ~5 ~5 ~5 oak_fence
            2. Place or break a block next to the filled fences

              Attachments

              1. lag spikes .png
                lag spikes .png
                1.60 MB
              2. MC-lag_spike_.mp4
                673 kB
              3. rebuildNear lag example world.zip
                393 kB
              4. Screenshot (930).png
                Screenshot (930).png
                130 kB
              5. Screenshot (931).png
                Screenshot (931).png
                207 kB
              6. Screenshot (932).png
                Screenshot (932).png
                24 kB

                Issue Links

                is duplicated by

                Bug - A problem which impairs or prevents the functions of the product. MC-123582 Rendering Error

                • Resolved

                Bug - A problem which impairs or prevents the functions of the product. MC-123762 Extreme Frame Drop When Placing/Breaking Blocks

                • Resolved

                Bug - A problem which impairs or prevents the functions of the product. MC-124153 MC-38433 is back/still in the game

                • Resolved

                Bug - A problem which impairs or prevents the functions of the product. MC-129545 The FPS is drop to 0 when loading the chunks.

                • Resolved

                Bug - A problem which impairs or prevents the functions of the product. MC-130282 Decaying leaf blocks cause severe micro stuttering

                • Resolved

                Bug - A problem which impairs or prevents the functions of the product. MC-133262 lagspikes

                • Resolved
                relates to

                Bug - A problem which impairs or prevents the functions of the product. MC-123263 Light Update or Block Update FPS issue

                • Open

                Bug - A problem which impairs or prevents the functions of the product. MC-126518 Redstone or lighting updates causing severe lag and framerate drops

                • Open

                Bug - A problem which impairs or prevents the functions of the product. MC-131549 Every block change results in it re-rendering

                • Open

                  Activity

                    People

                    • Assignee:
                      rherlitz [Mojang] Rikard Herlitz
                      Reporter:
                      marcono1234 [Mod] Marcono1234
                    • Votes:
                      266 Vote for this issue
                      Watchers:
                      94 Start watching this issue

                      Dates

                      • Created:
                        Updated:
                        CHK: