adding a little documentation as taken from the original bug report :)

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+
+Created an attachment (id=566)
+povray-3.1g-r4 icc pgo data I collected.
+
+This is the PGO profiles I collected to benchmark povray. I have a Pentium II
+cpu and made these with CFLAGS optimal for my box but I'm pretty sure I read
+that these files will work with most any CFLAGS variation. I haven't tested
+these on other CPUs. If it breaks, sorry, you'll have to generate the profile
+data yourself.
+
+To use these download the tarball. 
+First make sure you have the povray-3.1g-r4 ebuild an related files from above.
+
+Then cd into /var/tmp/portage/povray-3.1g-r4
+(You will need to mkdir this if you haven't merged this povray pacakge version
+before.)
+Then run `tar xpzf /path/to/povray-3.1g-r4-icc-pgo.tar.gz`
+(make sure you use the p with tar, the icc-pgo directory needs to be world
+writeable if you want non-root users to be able to generate profile data.)
+then run `USE="icc icc-pgo" emerge povray` to get a brand spanking new povray
+tweaked to the teeth. (You can put that USE stuff in your /etc/make.conf too
+but I wouldn't until it is agreed on how icc will be used in ebuilds.)
+
+If the resulting povray doesn't work and you want to take the time to generate
+profile data, then delete the icc-pgo dir and use the same emerge line, run
+povray some, and then use the same emerge line again.) I used the following
+script-on-the-command-line to generate some profiles.
+
+for x in /usr/lib/povray31/scenes/advanced/*.pov ; do nice povray +W160 +H120
+-I
+ $x +A0.2 +AM2 +J0.1 +R3 +V -O `basename $x`.png ; done
+
+ To get an accurate profile you'll want to run that a few times with different
+ parameters (between the "$x" and "-O") else your profiles won't be very
+ complete.
+
+
+ # tar tzf povray-3.1g-r4-icc-pgo.tar.gz
+ icc-pgo/
+ icc-pgo/3cba06a9.dyn
+ icc-pgo/3cba06b8.dyn
+ icc-pgo/3cba06cc.dyn
+ ..... etc (32 files) ....
+