cdb reader and creator

[Baz via Digitalmars-d-announce]

On Monday, 13 April 2015 at 21:34:36 UTC, ketmar wrote:
> here is Cdb[1] reader and creator, in two small modules.
>
> reader: [2]
> creator: [3]
> sample: [4]
>
> it's totally untested, but i believe that is works. at least 
> for the
> given sample.
>
> Public Domain, based on tinycdb[5].
>
> [1] http://cr.yp.to/cdb.html
> [2] http://repo.or.cz/w/iv.d.git/blob_plain/HEAD:/tinycdb.d
> [3] http://repo.or.cz/w/iv.d.git/blob_plain/HEAD:/tinycdbmk.d
> [4] 
> http://repo.or.cz/w/iv.d.git/blob_plain/HEAD:/tinycdb_test/cdbtest.d
> [5] http://www.corpit.ru/mjt/tinycdb.html

Hi, i'd have a technical question about cdb, maybe a bit 
off-topic...

Why it was designed to use 256 hashtables ?
Why not single bigger 252 * 256 hashtable ?

Is it only to save space or there are some other reason ?