Benchmarks of COW directory copies and removal in [:cowbuilder: cowbuilder].

Details

The number in the copy column was generated using:

time sudo cp -al /var/cache/pbuilder/base.cow /tmp/new

and in the remove column:

time sudo rm -rf /tmp/new

computer

copy

remove

computer details

pc232

16.1

18.2

Intel Core 2 Duo, ST3250820AS /dev/sda1 (10GB, xfs, 80% full), sid, i386

august

9.3

10.9

Intel Core 2 Quad, ST3320620AS /dev/sda1 (20GB, xfs, 20% full), sid, i386

dakol

0.48

0.5

AMD Athlon 64 3800+, ST3160827AS /dev/sda7 (135GB, xfs, 32% full), sid, amd64

fuji

13.9

16.4

Intel Core Duo, WDC WD1600BEVS-2 /dev/sda1 (14GB, xfs, 33% full), sid, i386

If anyone has any explanation, why dakol is 20x faster than the other computers, please write it here. Is it because of the position of the disk partition, or that it's larger? pc232 is full, but the other computers have around the same disk usage. Note: /var and /tmp is on the same partition on all computers.