Wasted RAM

About 20%~25% of RAM are being consumed just when going from building BVH to packing BVH nodes, then suddenly goes back NORMAL at the instance packing finishes.
My render centers mostly on hair simulation scene.

A scene needs 77% of actual memory and it’s ok, but why it has to disappoint me after then when it pack these BVHs and freeze windows.

Hi, you can try a daily build from https://builder.blender.org/download/
There are many fixes to reduce peak memory.

Cheers, mib

Well it kinda saved 9%~11% which is very supporting plus I’ve noticed 5% of actual memory usage is basically gone.