Linux 3.7 File-System Benchmarks: EXT4, Btrfs, XFS
EXT4 was the fastest file-system on this single SSD system for Dbench.
For the IOzone read tests, EXT4 was faster than Btrfs and XFS with the different block sizes. For all three file-systems, the read performance with IOzone degraded on Linux 3.7 compared to Linux 3.5.
The IOzone write results were much closer between the three file-systems.