>>102252229
dd if=/dev/zero of=ramdisk/zeros bs=1k count=5M
5242880+0 records in
5242880+0 records out
5368709120 bytes (5.4 GB, 5.0 GiB) copied, 50.7534 s, 106 MB/s
sudo -u nfs-user dd if=/dev/zero of=/mnt/nfs/zeros bs=1k count=5M
5242880+0 records in
5242880+0 records out
5368709120 bytes (5.4 GB, 5.0 GiB) copied, 58.1652 s, 92.3 MB/s
huh, its actually only a bit slower.