Re: Optimizing pglz compressor

On Wed, Mar 6, 2013 at 8:32 AM, Joachim Wieland <joe@mcknight.de> wrote:
> On Tue, Mar 5, 2013 at 8:32 AM, Heikki Linnakangas
> <hlinnakangas@vmware.com> wrote:
>> With these tweaks, I was able to make pglz-based delta encoding perform
>> roughly as well as Amit's patch.
>
> Out of curiosity, do we know how pglz compares with other algorithms, e.g. lz4 ?

This has been a subject of much recent discussion. It compares very
poorly, but installing a new compressor tends to be problematic due to
patent concerns (something which I disagree with but it's there).  All
that said, Heikki's proposed changes seem to be low risk and quite
fast.

merlin