How often does Mahout need the "Comparable" part for Vectors? Are vectors commonly used as map output keys?
In terms of space efficiency, I'd bet it's probably a bit better than a factor of two in the average case, especially for densevectors. The gson format is storing both the int index and the double as raw strings, plus whatever boundary characters. The writable implementation stores just the bytes of the double, plus a length. -- David On Thu, Jun 18, 2009 at 2:13 PM, Jeff Eastman<j...@windwardsolutions.com> wrote: > +1 asWritableComparable is a simple implementation that uses asFormatString. > It would be good to rewrite it for internal communication. A factor of two > is still a factor of two. > > Jeff > > > Grant Ingersoll wrote: >> >> On Jun 18, 2009, at 4:45 PM, Ted Dunning wrote: >> >>> Writable should be plenty! >>> >> >> +1. Still nice to have JSON for user facing though. >> >>> On Thu, Jun 18, 2009 at 1:15 PM, David Hall <d...@cs.stanford.edu> wrote: >>> >>>> See my followup on another thread (sorry for the schizophrenic >>>> posting); Vector already implements Writable, so that's all I really >>>> can ask of it. Is there something more you'd like? I'd be happy to do >>>> it. >>>> >>>> >> >> >> >> > >
