So i tried 17w50a to make my 'new' stone generator because the Block updates doesn't affect Water/Lava anymore in this version...
I noticed a huge FPS issue while there is Light or Block Update with anything.
Everything is in the video, sorry for my miss spelling.., my main langue is french.
So you can see when i start mining my FPS decrease to ~10FPS.
*I did a Test Difference with 1.12.2 and 17w50, results happen to both. But it can be handle 'Okay' in 1.12.2
~35FPS while mining 1.12.2
~5FPS while mining 17w50a
Link of uploaded world here:
True, mining make tone of particles (about the related issue linked to mine) but w/o mining, the redstone it self make alot of spike lag when updating.
MC-123584 has more information related to this issue in more detail.