Chunk gen limiter fix some TPS lag during worldgen but introduce another TPS lag
tps profiled using Patcher mod

mods lists

Essential-Forge-1.12.2
!mixinbooter-8.3
Patcher-1.8.7 (1.12.2)
spark-forge1122
UniversalTweaks-1.12.2-1.6.0

spark profiler

-chunk gen limiter enabled

https://spark.lucko.me/oRdElPggaC

-chunk gen limiter disabled

https://spark.lucko.me/QzXHgW7gcw

videos

-chunk gen limiter enabled(33ms max)

https://mega.nz/file/vhEAkBZI#vZfiVQy9SMgPUmDpQVOWoORE265QCL07PYzVisdoCYM

-chunk gen limiter disabled(80ms max)

https://mega.nz/file/SlVxVLpJ#Q4txVu9UPWqV11RxpREOyNdEtWOj6gdZlEx6VfWH8Yg