I've *not* applied any kind of compression while using the FI. I am
not sure but I think there is no default compression done when the XML
is converted to FI file.


There is a free tool called "Noemax FI Converter" [http://] where XML file can be
converted to FI file and Viceversa and has *compression* as additional
option. Using "Noemax FI Viewer" [
fi_viewer.html], the FI file can be viewed in text format.


On Apr 3, 10:08 pm, Kenton Varda <> wrote:
> On Fri, Apr 3, 2009 at 2:40 AM, ShirishKul <> wrote:
> > I found that for a typical data to be transferred across the wire for
> > size of 500KB that a XML file would represent has corresponding file
> > size as 300KB for PB binary and around 130KB for XML Fast Infoset
> > binary file.
> What kind of data were you encoding?
> I'm guessing you enabled some kind of compression for the FI encoding?  Note
> that protocol buffers, while compact, do not actually apply any sort of
> compression themselves.  For repetitive data or data containing a lot of
> text strings, applying zlib compression to the encoded message can make it
> much smaller.
> > Timings to parsing and serializing is extremely good for Protocol
> > buffers.
> :)
> (Don't forget to use optimize_for = SPEED if performance is important --
> this will be the default in the next version.)
> What makes a difference if we consider XML fast infoset binary against
> > PB binary in terms for Sizes, speed to parse them up etc.?
> I don't actually know much about FI.  My guess based on reading some
> descriptions of FI is that PB is similar to FI's non-self-describing,
> no-compression mode.  I would also guess that because XML is a much more
> complicated format than protocol buffers, FI probably has more overhead when
> encoding simple structured data, especially number-heavy data.  For
> string-heavy data, though, XML works pretty well and so this overhead may
> not be an issue in that case.
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