Re: Can I use CRoaring library in Git?

[Abhradeep Chakraborty <chakrabortyabhradeep79@gmail.com>]

On Mon, Jul 18, 2022 at 3:55 AM Taylor Blau <me@ttaylorr.com> wrote:
> > Assuming that we can clear the licensing issues (or we can write our
> > own implementation from spec), how would the transition plan look
> > like?  Does our bitmap format carry enough metadata to allow
> > existing clients who never saw anything but ewah bitmaps to say "ah,
> > this bitmap file uses encoding I do not understand" and gracefully
> > fall back to not using the bitmap?
>
> Yes, the version field alone does this, since the existing readers know
> to ignore a bitmap whose version they do not understand.

Yeah, the version field itself is enough to do this.

> I assume that Abhradeep will want to pursue some format redesign as part
> of the transition, though, at least to see if changing the format beyond
> a version bump and new compression scheme is worthwhile.

I haven't thought much about it until now. As far as I think we don't
need Xor Flag anymore.
My primary goal is to implement Roaring Bitmap as soon as possible and
perform performance testing. If the performance tests give good
results, I will think about reformatting.
As far as it seems most will stay the same.

Thanks :)