Missing TS3W.exe in Sims 3 Install (Only Have TS3.exe 1.0.0.18)

erinmay98​  I would test with your mods and custom content removed, not because you need to play that way in general but because it would be helpful to know how much of a difference it made.  And if you're playing in a custom world, try an EA-made world that isn't Isla Paradiso or Bridgeport for comparison.  Some custom worlds are simply too large to stay under the memory limit.

There are lots of other tips I could offer, but that's partly dependent on the results of the above.