i have 130+ mods. (bob+angel+modMash modpack), game installed on SSD M2, mods dir on SSD too.
after adding this mod (Sparkletron's Terraformers) game (to main menu game screen) begin load more than 25 minutes. Game Use One Processor core 100% (the processor not weak), disc usage 0-1%.
without this mod game loading time ~ 75 sec.
Same here. Not 25 min but like 1 min. Maybe scales with mod count.
I don't think that this mod will get any updates after 1.5 years not touching it. Sad.