Why does The Sims 5 stutter when building large villas on Asgard RAM?

I was arranging a complex modern villa when character movements suddenly exhibited a visible lag, creating a micro-stuttering experience that totally broke my immersion. I initially tried increasing the system page file size, but instead of fixing the lag, my overall frame rate dropped from 120 FPS to 95 FPS, which was incredibly confusing. I then used the GamePP Resource Scheduler to elevate the game process priority from Normal to Realtime. The result was instant; the frame generation interval converged to 6.2-8.4ms per GamePP monitoring, while memory temps stayed at 54-60℃ per HWInfo64 and scheduling fluctuations hit 15.2-18.4ms via AIDA64.