When extending a piston into a large group of particles, there will be a brief loss of FPS (a lag spike).
Seps to Reproduce:
Prerequisites:
Increase entity cramming (Increasing this makes the issue more obvious)
/gamerule maxEntityCramming 100
Import this structure into your save (.minecraft\saves[world name]\generated\minecraft\structures)
Steps:
Load the structure file in your world
Open the FPS graph (F3 + 2)
Extend any of the four pistons
→ ❌ A lag spike will occur
→ ✔ A lag spike would not occur
Screenshots/Videos:
Particles disabled vs particles enabled:
[media]
Notes:
This is specifically due to the particles of the blaze, and not the entity itself. Testing this with zombies, or blazes with no particles has no FPS loss:
This was discovered while testing MC-158037, though that issue is different to this one.
Linked issues
discovered while testing
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