Joel VanderWerf wrote:
> Another option:
> 
> http://redshift.sourceforge.net/bit-struct/
> 
> I don't know bindata, but from a quick glance at the docs I see that it
> does handle related fields, like length fields that specify the length
> of another field. BitStruct does *not* do that.
> 
> Another difference is that BitStruct is a subclass of string, so it is
> very efficient to send a bitstruct to a socket or file or perform other
> string operations.

amazing performance, for creating 10k instances of the same simple 
struct (ruby 1.9 rc1):

             user     system      total        real
bindata  3.681000   0.000000   3.681000 (  3.827000)
bit-struct  0.063000   0.000000   0.063000 (  0.057000)

so bit-struct is actually a good choice for networking without any 
modifications
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