Can I compile rockbox any faster?

[Gregory]

I've noticed that building rockbox takes quite a while, around 6 minutes on my 2.6 GHz amd.  Is this typical or is there something I can do to speed it up? 
I'm asking because when I'm watching my processor usage, it hovers around 20% percent, leading me to believe it might be possible for it to be faster.

[soap]

make -jN
where N is the number of cores you have +1, maybe even +2 or more.

Also install ccache if you don't already, it will save time on subsequent compilations of files which haven't changed.

Also compile in native Linux if you can, if not VMWare should be second fastest, with cgywin coming in a distant third.

[gnu]

How fast would CoLinux be?

[Llorean]

On a 2.2ghz AMD dual core, I could perform builds in 1:30 or less regularly. This is with native Linux, but CoLinux should approach this.

[Gregory]

Well I've been using cgywin, but I have a dual-boot with Ubuntu, so myabe I'll give that a try.

[nls]

If you want to keep using cygwin temporarily disabling your anti virus software can speed it up. Also there's no need to make clean every time if you have been doing that.

[yapper]

I had been using cygwin, but I've just installed the VmWare development platform guided by the wiki.

cygwin was taking around 6.25 minutes for a full build, and with VmWare that has dropped to around 4 minutes.