Based on this early comparison,
the Windows 11 26H2 preview shows a resource footprint that is effectively identical to 25H2 when running an identical knowledge worker workload. CPU utilization differs by roughly half a percentage point, memory usage is within half a percent, disk reads are unchanged, and disk writes show only a slight increase on the preview build. The 26H2 preview also runs slightly fewer processes on average, but the difference is small and well within what could change before general availability.
Research is creating new knowledge
www.go-euc.com