many expansions for index bundles

[tea-dragon]

they should really be called 'list bundles' and kv bundles should
be 'map bundles', but we already have a 'list bundle' that is
actually more like a 'linked hash map bundle' so oh well.

• no longer instances of bundles, rather they share a relatively
  simple common super-type
• optimized and much cleaner serialization codec
• additional interface options that together provide a lot more
  flexibility to an index bundle implementation, but still pass on
  the simplicity gains of index-only mapping to downstream users

[abramsm]

nice. would be interesting to see performance comparisons between different bundle types.

[tea-dragon]

While i'm certain index bundles would be the most performant (kv bundles
aren't even close, and list bundles have both array list and bundle field
indirection), the original purpose was to use it to clear out the
inconsistent format and column indexing in query ops where "3" sometimes
means the third column and sometimes means a column named "3" (which may
easily not be the third column).

The serialization improvements, abstraction changes (mostly to enable later
additional serialization improvements), and performance gains are just nice
extras.

On Thu, May 8, 2014 at 9:12 PM, Matt Abrams notifications@github.comwrote:

nice. would be interesting to see performance comparisons between
different bundle types.

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