Add window check (used at top level window.performance) for non-browser environment
Add window check (used at top level window.performance) for non-browser environment

z3t0/voxelmetaverse,z3t0/voxelmetaverse,nacjm/modcraft,nacjm/modcraft,z3t0/voxelmetaverse,deathcap/voxelmetaverse,deathcap/voxelmetaverse,deathcap/voxelmetaverse