RFC: bitmap storage for precursors and phases

[Sean Farley]

Augie Fackler <raf at durin42.com> writes:

> On Fri, Feb 17, 2017 at 07:14:12PM -0800, Jun Wu wrote:
>> Excerpts from Bryan O'Sullivan's message of 2017-02-17 13:29:58 -0800:
>> > I think there are multiple topics being discussed:
>> >
>> >   1. How to solve the overhead loading hiddenrevs with minimal changes?
>> >   2. Why is the bitmap format interesting (future use-cases)?
>> >
>> For 2,
>>
>>   len(filteredrevs) in my hg-committed is 2155. It's small. I tend to think
>>   about solutions that scale longer and are not too complex to build. That
>>   may or may not be a good habit.
>>
>
> For what it's worth, my clone of hg has 12716 hidden revisions - about
> a quarter of the entire repo history is hidden.

Actually, that's 40%. Mine is a bit over 25%.