Run don't walk to implement this if you are running Collatz.
You will get a MASSIVE improvement in times/credits.
As always will vary from machine to machine, but on mine its around 200% !! On those with mid-low end machines, the savings will be huge - could be several thousand seconds per WU.
Look at the first four posts - I have made two of them, one being a detailed "starter for ten" on implementing this.
Run don't walk to implement this
http://boinc.thesonntags.com/collatz/fo ... hp?id=1009