Linux 3.3 Kernel: Btrfs vs. EXT4
Compile Bench with the initial create test was faster on EXT4 too.
With the compile test, Btrfs was inching ahead of the widely adopted EXT4.
With the Linux 3.3 kernel, for many workloads on a single-disk -- whether it is an HDD or SSD -- the EXT4 file-system is faster than the Btrfs file-system. Though if you're after using Btrfs for one of its many technical features/advantages over the evolutionary EXT4, there are ways to tune the Btrfs performance by using transparent file-system compression, space cache, and there's also other upcoming optimizations.
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