Everyone says disabling SysMain speeds up Windows 11, so I benchmarked it on two PCs

windowslatest.com Oct 26, 2026

Everyone says disabling SysMain speeds up Windows 11, so I benchmarked it on two PCs

Curated by Shubham · TechCapsules · Oct 26, 2026

AI-summarised brief · reviewed before publication

A recent benchmark on two Windows 11 PCs tested the impact of disabling SysMain (formerly Superfetch). On a 16 GB system, turning the service off produced negligible changes to boot and app launch times, while on a 4 GB virtual machine boot time improved from 42.83 s to 35.18 s but app launch time worsened from 3.14 s to 8.48 s. SysMain preloads frequently used applications into RAM and aids Fast Startup, but its benefits are limited to low‑memory or slow‑disk configurations. The study confirms that most users need not disable the service.

💡 Why It Matters

· The findings clarify that routine SysMain disabling offers little performance gain for modern hardware, dispelling widespread online myths.
· They also highlight that the service’s real value lies in specific low‑resource scenarios, guiding users toward more effective optimization tactics.

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