Game freezes since crash - even in old Savegames

[Azzarrel]

Problem:
I like to play with mods ... a lot of mods.
Before beginning a new colony I spent hours testing mod compositions and map sizes to make sure there isn't even the slightest evidence of stuttering. I am pretty sure I was successful, as I played countless hours without noticing any lag ... right until the game crashed due to some bug probably related to "Dubs Bad Hygiene" (as the whole map was filled with unconnected pipes in the last - corrupted - savegame). I loaded a previous savegame and noticed, that there are freezes every 16 seconds (no matter the game speed). They are just a minor stuttering, but since I noticed them I just can't unsee them and it's driving me crazy. I even checked one of my earliest savegames of this colony, but the freezes prevail.

Mods:

Horses sometimes cause  NullPointerException breaking the UI if you hover over them due to some incompartibility with CE, which has some problems on its own in HCSK already, but besides these neither consistent nor gamebreaking bugs my Logs stay quite clean.

          - Core
          - HugsLib
          - Humanoid Alien Races 2.0
          - Combat Extended
          - Core SK
          - EdB Prepare Carefully
          - JecsTools <- Non HCSK
          - Architect Icons
          - Facial Stuff 1.0
          - Facial Stuff Dianne Defaults
          - AlienFaces
          - Androids
          - Androids Facial Stuff Patch
          - Skynet SK
          - Interaction Bubbles
          - [KV] More Trait Slots - 1.0
          - Area Unlocker
          - Allow Tool
          - Camera+
          - CleaningArea
          - Miscellaneous 'CORE'
          - Misc. Robots
          - Misc. Training
          - Misc. Bees'n'Honey
          - Expanded Roofing
          - My Little Planet
          - Dubs Bad Hygiene
          - HolyWasher
          - RT Fuse
          - RT Solar Flare Shield
          - [SYR] Set Up Camp
          - Real Ruins
          - Snap Out!
          - Pick Up And Haul
          - Hunt for Me
          - A Dog Said... Animal Prosthetics
          - Where is my weapon?
          - Tech Advancing
          - Hospitality
          - Dismiss Trader
          - Locks
          - Mass Graves
          - Rim of Madness - Arachnophobia
          - Minerals_SK
          - [RF] Realistic Planets [1.0]
          - Realistic Darkness
          - ZiTools
          - Better Workbench Management
          - [KV] Save Storage, Outfit, Crafting, &amp; Drug Settings - 1.0
          - Numbers
          - Relations Tab
          - Colony Leadership
          - Work Tab
          - Colonist Bar KF 1.0
          - Simple sidearms
          - Recipe icons
          - Dubs Mint Menus
          - MoreInfoBox
          - Days Matter
          - Rimworld Search Agency
          - Rimworld Search Agency HSKPatch
          - RuntimeGC
          - Research Tree
          - HelpTab
          - TGC Patches
          - Psychology
          - SeedsPlease
          - More Planning
#Non HCSK Mods:
          - [RF] Editable Backstories and Names [1.0]
          - Safely Hidden Away
          - Fallout Traits
          - Crash Landing
          - Roppoi hair 1.0
          - Ponytail is Kawaii
          - [B19]GW-HornHair
          - [Uru] Touhou Hair (1.0)
          - [Uru] Rim Seraph hair (1.0)
          - Rimsenal - Rimhair
          - [Ods] Mens Hair
          - [Beta]Anime Hair
          - [SS]Lovely Hair Style
          - Faction Discovery
          - More Faction Interaction
          - [KV] Faction Control - 1.0
          - Horses (1.0)
          - Horses (1.0) A Dog Said Patch
          - Giddy-up! Core
          - Giddy-up! Battle Mounts
          - Giddy-up! Ride and Roll
          - Giddy-up! Caravan
          - Animal Variety Coats
          - Storyteller hair 1.0
          - Map Reroll
          - Sometimes Raids Go Wrong
          - [1.0] Wild Animal Sex V4.1
          - Harvest Organs Post Mortem - 4.1 [1.0]
          - Mechanite Forge Reborn
          - [KV] Consolidated Traits - 1.0
          - Haul to Stack
          - A RimWorld of Magic
          - Fences And Floors
          - SS Researchable Stat Upgrades
          - Prison Labor

Hardware:

Intel I7 8700k Processor. (Runs at 18-29% when playing Rimworld, overlocked to 4,4 GHz)
32GB DDR4 RAM. (I managed to use up to 11GB RAM when playing for hours without restarting, now the game won't go over 4GB before I quit due to the freezes)
NVIDEA GTX 1080Ti with 11GB DDR5 dedicated memory (Runs at 14% with less than 2GB of it's memory in use)
Samsung SSD EVO850

What I tried so far:

- Checked for red errors in the log
- Asked on the HCSK Discord about the problem
- Checked, if this problem still occurs on a new save (started new colony with default map size / yes it does)
- Reinstalled the game
- Updated my Drivers (Processor and GPU so far)
- Closed all other applications in the background (besides steam and discord)

My Questions:

I am almost 100% sure there were no freezes earlier, so where do the come from? How can I get rid of them?

To better understand the reason behind my freezes I'd also like to find out:
- How much do cosmetic mods like hair affect the performance if none/only a few of the hairs are loaded?
- Is there a way I can check how much performance a mod needs?
- How much do trait mods or partial inactive mods (like mapreroll impact performance)?