Working on performance issues on source.mofostaging.net

[jdotpz]

Hi there!

I grabbed these straces to try to get some clues about why source.mofostaging.net seems so sluggish. I haaven't reviewed much yet, just pasting in results:

http://pastebin.mozilla.org/2488131

[jdotpz]

A helpful friend @deanw noticed something:

all the slow requests do not set content length in the header, while all the fast requests do.
http://www.pastebin.mozilla.org/2488221