Re: [PATCH v4 08/23] ewah: compressed bitmap implementation

Jeff King wrote:

On Thu, Jan 23, 2014 at 02:17:55PM -0800, Jonathan Nieder wrote:

quoted

I don't think that's a big issue.  A pair of 4-byte reads would not be
too slow.

The header is actually two separate 4-byte values, so that's fine. But
between the header and trailer are a series of 8-byte data values, and
that is what we need the 8-byte alignment for.

Sorry for the lack of clarity.  What I meant is that a 4-byte aligned
8-byte value can be read using a pair of 4-byte reads, which is less
of a performance issue than a completely unaligned value.

[...]

Anyway, this is all academic until we are designing bitmap v2, which I
do not plan on doing anytime soon.

Sure, fair enough. :)

Jonathan