andrewdavey/cassette — pull request #148 by nazjunaid (2012-01-27 17:15:07+00:00)
Title: PlaceholderTracker Performance improvement 

Whilst investigatiing pager performance I found a large percent taken up by cassette's PlaceholderTracker.

doTrace

http://i.imgur.com/KH3Pi.png

http://i.imgur.com/9BoyM.png