So, I was curious which file system for was the fastest when it comes to be mounted with the sync option, and here were my results:

ext4 : 10Kb/s btrfs : 10Kb/s jfs : 6MB/s f2fs : 17Kb/s xfs : 10Kb/s vfat : 20Kb/s exfat : 20Kb/s minix : 20Kb/s ntfs : 5Kb/s reiserfs: 9Kb/s Winner: jfs

was the winner by a land-slide, and I have no idea why lol