Light Update or Block Update FPS issue

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.

https://youtu.be/J2aNTC9TRN8

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:
http://www.mediafire.com/file/jlakym4x7nme63f/RedStone%20and%20Test%20-%2017w50a.zip

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.