There are a number of factors in play here. btrfs is not production ready in the Maverick kernels, it is slow in general and very slow in the face of an fsync centric load. Btrfs was enabled in the installer as an experimental feature, as a technology preview, and as such it is not likely anyone is going to work to backport any performance fixes to Maverick. For Natty we are expecting some direct improvements from layout improvements, and from upstream fixes. Closing off the Maverick task Won't Fix.
There are a number of factors in play here. btrfs is not production ready in the Maverick kernels, it is slow in general and very slow in the face of an fsync centric load. Btrfs was enabled in the installer as an experimental feature, as a technology preview, and as such it is not likely anyone is going to work to backport any performance fixes to Maverick. For Natty we are expecting some direct improvements from layout improvements, and from upstream fixes. Closing off the Maverick task Won't Fix.