How to read bootchart

[El_Presidente_Pufferfish]

I've installed bootchartd, successfully run it, and gotten these files:
http://mywebpages.comcast.net/elprespufferfish/bootchart.png
http://mywebpages.comcast.net/elprespufferfish/bootchart.svg

I'm having trouble reading it and understanding how to tell what's taking too much time and holding up my boot.
So far i've really just noticed dhcpcd taking up too much time( boot is about 4 seconds faster without it ).

Any help?

[El_Presidente_Pufferfish]

Hmm...switching from dhcpcd to pump seems to have shaved 4 seconds off of my boot.

http://mywebpages.comcast.net/elprespufferfish/bootchart-pump.png

There still seems to be a giant dead space when pump is running, though.