Comment 79 for bug 131094

I have copied two big files concurrent (~15% bigger than my memory) with dd form one ext3 (xfs) to another ext3 (xfs) partition (same hard disk). I tried a block size of 10 bytes and 100 bytes for the copy operation. Tracker is disabled. My disc performance is about 50 - 60 MB/s (USB2 ~20MB/s), when I copy one big file form /dev/zero to disc. The CPU consume is higher in Gutsy and Hardy. Perhaps there is a different caching algorithm implemented since gutsy?
I always used a fresh install with all updates.

Feisty:
bs=100 - xfs=~10MB/s - ext3=~9MB/s
bs=10 - xfs=~6MB/s - ext3=~6MB/s

Gusty:
bs=100 - xfs ~6MB/s - ext3 ~3MB/s (sometimes I get results about 9MB/s for both file systems)
bs=10 - xfs ~3MB/s - ext3 ~1MB/s

Hardy:
bs=100 - xfs=~7MB/s
bs=10 - xfs=~4MB/s

bs=100 - ext3(usb2)=~6MB/s
bs=10 ext3(usb2)=~2,5MB/s