I checked the amount of memory bfv.exe is using and it's quite a lot:
Virtual memory reserved (commit) first ~11GB and grew to ~12GB while playing a while
Reserved physical memory (working set) first ~5.5GB and grew to ~6.5GB
I'm having 32GB RAM. Just thinking how much bfv reserves if you're having 8 or 16GB RAM in your rig. Is bfv checking how much you are having memory and reserves less according to that? Anyway uses a lot and having less memory could cause stutters?