https://wccftech.com/yuzu-nintendo-switch-emulator-just-got-updated-to-use-50-less-ram/

Yuzu, the Nintendo Switch emulator on PC, continues to be developed at neckbreaking pace. The latest improvement revealed only a few hours ago promises to essentially cut the emulator's RAM usage in half, thanks to a complete rewrite of yuzu's memory management code.

This was accomplished by rewriting yuzu’s Virtual Memory Manager (VMM), the software component that allocates, maps, and frees memory that Switch games use. This is a part of the emulator that uses High Level Emulation (HLE) to replicate functionality of the Switch’s "Horizon" Operating System. Previously, yuzu used a rather simplified approach to the VMM, based on Citra 3DS Emulator. Citra’s approach has served us well in getting the emulator working, but it was really designed for a much simpler system that did not scale to the needs of Switch.