fixed loss calculation in spark
Merge branch 'porkchop' of https://github.com/pbailis/spark into porkchop
benchmark for wikipedia
Merge branch 'porkchop' of https://github.com/pbailis/spark into porkchop
merging
Merge branch 'porkchop' of https://github.com/pbailis/spark into porkchop
so post giving up hacking