SrslySims
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Simulation Lag Fix (Definitive Edition)
🕑 Added 2025-09-04 01:43:54 +0000 UTCWhat is "Definitive Edition"?
In this case, this means this is the post/download for the most up to date version of Simulation Lag Fix other than on CurseForge.
If you are downloading from any other location that does not have the term "Definitive Edition" for this mod then you are using an old version.
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This is an update to simmythesim’s Simulation Lag Fix for the latest version of the game.
It was also previously maintained by Xerox on Mod The Sims, but they no longer are keeping it updated.
I have been updating the mod for quite some time now via the comments on Xerox’s MTS page. But decided I should post it here so I do not forget to update it in the future.
I have not changed anything from the original mod, I simply just updated the python code and patched it for the most recent update for The Sims 4.
NOTE:
If you use MC Command Center to adjust the “Game Time Speed” in the game manually, DO NOT use this mod.
By Manually I mean: “MCCC > MCCC Settings > Gameplay Settings > Game Time Speed” This should not be adjusted in MCCC if you use Sim Lag. Leave it alone at the defaulted to 25 in MCCC.
If you use MCCC but do not adjust the “Game Time Speed”, you are fine.
Compatible with TurboDrivers Simulation Unclogger.
These mods do two completely different things, and I highly recommend grabbing TurboDrivers mods to use with Sim Lag Fix.
WHAT DOES THIS MOD DO?
“This mod alters the game’s time speeds so that sim autonomy does not cause massive simulation lag in instances where there are many autonomy requests.”
This should eliminate, or at the very least, alleviate, the following problems:
Sims head bobbing
Sims doing nothing for a few hours
time slowing down on speed 3
time going back to the past
MOD EXPLANATION
This seems rather basic, but there’s a video showing a scientist experimenting in GTW without the mod (*See above)
Everything runs much more frequently now, preventing the “bobbing head” effect. I haven’t experienced any time rolling-back since I made the mod!
If you have bugs after updating normally, follow these steps:
1. Remove the previous version of Sim Lag Fix and Clear Your Cache.
2. Start your game with Sim Lag Fix removed, progress in your save 1-2 sim days.
3. Save your game, then close it.
4. Install the new version of Sim Lag Fix, and enjoy!
Still having issues with your game and simulation lag?
Check out this useful information from TurboDriver explain what simulation lag is and what causes it. One of the biggest causes being out of date scripts and tuning resources which you can check yourself quickly.
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Be sure to Clear Your Cache, and remove all previous versions of the mod.
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As always, if you have any questions or issues let me know via Discord!
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Changelog
+ Added "Definitive Edition Update"
/ Renamed and updated included script injector
/ Updated script for patch 1.116 changes
