why is bzr so slow?

from the whinge of the day dept: I started a bzr branch of calibre about 2.5 hours ago because I wanted to see how difficult it would be to understand the code and make a few changes. The calibre Get Involved page warns that it can take about an hour….which is excessive to begin with and, worse, a huge understatement. $ date ; ps u -Cbzr Sat Apr 14 15:10:00 EST 2012 USER PID %CPU %MEM VSZ RSS TTY STAT …