Btrfs Benchmarks: Btrfs Is Not Yet The Performance King
At the popular IOzone disk test, when it came to measuring the 2GB write performance, Btrfs failed to take the lead again. XFS was the fastest while the EXT4 file-system was immediately behind that at 86MB/s, but Btrfs was at 67MB/s and right behind that was the EXT3 file-system at 65MB/s.
When doubling the write size to 4GB, EXT4 remained in front at 81MB/s while Btrfs had dropped to 61MB/s. The XFS file-system ran at 76MB/s in this test.
Btrfs finally came out ahead of EXT4 when looking at the 4GB read performance with IOzone, but it was by a very slim margin. Btrfs had sustained an average read speed of 68MB/s while the EXT4 file-system was at 66MB/s. The EXT3 file-system was back at just under 50MB/s. XFS actually won this test with an impressive 79MB/s.
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