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Re: New Copy Formats - avro/orc/parquet

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> > That is true, but the question is how significant the overhead is. If
> > it's 50% then reducing it would make perfect sense. If it's 1% then no
> > one if going to be bothered by it.
> 
> I think it's pretty clear that it's going to be way way much more than
> 1%. 

Good news but not sure to anderstand why.

> It's trivial to construct cases where input parsing / output
> formatting takes the majority of the time. 

Binary -> ORC
        ^
	|
   PROGRAM parsing/output formating on the fly

> And a lot of that you're going to be able to avoid with binary formats.

Still the above diagram shows both parsing/formating step, isn't it ?







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