RFC: bitmap storage for precursors and phases

[Sean Farley]

Jun Wu <quark at fb.com> writes:

> Excerpts from Sean Farley's message of 2017-02-13 17:04:35 -0800:
>> I was thinking about a more high-level approach (please feel free to
>> pick apart):
>> 
>> r = repo.filtered("bitmap1")
>> r2 = r.filtered("bitmap2")
>> 
>> So that r2 would be an intersection of bitmap1 and bitmap2 (haven't
>> thought about a union nor the inverse).
>
> That does not conflict with my comments. It could be implemented as nested
> filters, or flatten the bitmap by doing an "or" operation.

Righto. Just wanted to bring it up early before things are set in stone.