YouTube link describing and demonstrating issue: https://www.youtube.com/watch?v=xGUHaRAT498&feature=youtu.be
I can't give a public world download, as this is a large-scale map I am working on that will some day be released to the public. If any mod or dev so wants, I can send them a private download link for just the computer.
This bug (Or a slight variant of it) has been reported before, but it was said to be fixed for 1.8 worlds. The world in question is a 1.8 world, but the bug also occurred on two 1.7 worlds.
In the video I demonstrated the xp-jumping interaction, but it can also be demonstrated with the use of certain items that my commands are affecting, certain enemies and teleport commands issued by the setup, among other things. Also to be noted is that when the command blocks are lagging, things like fall damage also lag (It still occurs, it's just really delayed).
Ask questions, I'll be more than happy to respond. I just need this fixed, as no one can play this map if it isn't fixed.
Attached screenshot is the pie chart without me recording.
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But when it happens, Activity Monitor says I am actually using LESS processing power on all of my cores than when it is running smoothly (And I never go over 50% CPU usage on any individual core). So is Minecraft not getting prioritized or what?
As for optimizing my use of command blocks, I have. This is as optimized as I can realistically make it (To my knowledge).
The new parkour map "Infinite Cube" also cause me this same problem. Looking at comments on AntVenom's video of it, the vast majority of people have no trouble, but there is at least one other person experiencing this issue (WhoAreYou). It makes no sense that I can run games like Dota 2 at top graphical settings while simultaneously running five other intensive programs while backing up my computer and experience no lag, but the internal server of Minecraft freaks out when it uses more than a small percentage of the processing power of one of my cores.
Can an admin please comment? This appears to be a major bug to me (Possibly a Mac exclusive one).
Running "/gamerule logAdminCommands false" seems to help this. You might want to try this if you haven't already.
Minecraft, even on singleplayer, is split into a server running in the background and a client. Command blocks running outside of the client's render distance is a prime example of something that will lag the server, but not the client.
As far as I can tell, this is just lag. Try optimizing your use of command blocks.