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The Sims 4: Simulation Lag Fix

This mod is definitely a game changer!

Ever encountered one of these simulation lags in The Sims 4 where sims just stand by and do nothing even though the game is running at full speed?

This lag that’s been happening very often since the latest The Sims 4 Game Update has now been fixed by simmythesim modder. He explained what this issue is all about and how he fixed it in the text below:

To explain it concisely, imagine that the game updates using a bucket. The game fills this bucket when it needs to schedule stuff for processing. So if the game needed to run autonomy, it would dump a note in the bucket saying, “Hey, can you process this sim’s autonomy 30 minutes from now? Thanks.”

Now imagine that the bucket is getting full, it takes longer and longer to reach the end of the bucket. Now, autonomy is one of the most time-consuming systems in the game, so a few autonomy requests scheduled can take a whole chunk of time, causing everything else to not be processed in a timely manner.

You can notice this when the game stops processing “sub actions”, which are basically the interactions that make your sim do an animation, causing them to endlessly bob their heads and stop. The time can also slow down on Speed 3 and it can even jump back to the past.

Now, how did I fix this, you may ask? Remember that we know what takes the most time (autonomy) to process, so I separated autonomy and everything else into separate buckets!

Continuing our bucket analogy, I created a new bucket exclusively for autonomy. If the simulation bucket needs more than 17 milliseconds to run, then now, our new autonomy bucket won’t even run at all, creating a more responsive simulation. On my computer the time has never gone back in time nor slowed down after installing this mod, however, your results will vary depending on your CPU speed.

I’ve tested this mod and I can honestly say it’s making my gameplay 100% more enjoyable. Not only do Sims perform actions faster but there seems to be no situations where my sims get ”stuck” for no reason. Social events are running at full speed and festivals from The Sims 4 City Living no longer cause my sims to get stuck.

To download this mod, simply click the download button below!



Written by Jovan Jovic

Founder of the Sims Community website. I do plenty of things around here including writing articles such as "Top 10 Disney Princesses in The Sims", social media management, video content creation, streaming and more!


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  1. is this mod still functional? its been a couple years.. i just discovered mods. I cant believe there is still this lag and EA didn’t fix it still??

  2. Does anyone know of the site ?? And if so does anyone know of this Mod Faster, Responsive Speed ??? The reason I am asking I want to know if this Mod Above is like the Mod,Faster,Responsive Speed witch in which in that Mod all it pretty much does is just STOPS them darn SIMS from Standing around and NOT Doing NOTHING even when you tell them to do Something the mod I stated here will make them do it right away but it has problems its either Not Updated or something else,after only playing for a Short Time Frame your Memories I believe that’s what they are its in the same Area that counts down til you Give Birth but when you have this Mod Above all those Memories or whatever they are go Blank the Boxes are still there but they are White but you can’t see what they are…I use Mods in my game and I tell you guys that don’t use Mods you soooo are Missing out !!!! I’m gonna download this Mod right now after I get done writing this and I’m Hoping this download is what I’ve been looking for and isn’t going to cause any problems with all my other Mods cause I do have lots an lots of other mods lmao,and oh if anyone knows if Jogging for Kids/Children has been Updated can you give/send me the link please I either can’t find it or didn’t save the site witch cause all of the updates I had to remove Jogging for Kids/children and I can’t seem to find it an maybe the person who made it didn’t update it of course lol…… If anyone knows where to find about the jogging for children post it on here or just email sarahpickett2414 @ yahoo

  3. If anyone knows of any other Mods that will help with this Problem I have already Tried this Mod and it doesn’t fix it or even help it I can’t see that it does anything my Sims still stands there and does nothing looks like they are still standing there with there Fingers up there good for Nothing Butts !!!

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