New extension: chdb

Hi,

I would like to present an extension we have developed at Hyves
(www.hyves.nl) as a faster alternative to defining large amount of
constant data in PHP.

chdb (constant hash database - http://github.com/lcastelli/chdb)
provides a read-only hashtable that can be stored in a file and
memory-mapped into PHP processes. By using a memory-mapped file, sharing
across multiple PHP process and on-demand loading of pages are
automatically provided by the operative system. chdb also uses a perfect
hash function for indexing the hashtable, provided by cmph
(http://cmph.sourceforge.net/).

chdb is licensed under the 3-clause BSD license, while cmph (which is a
dependency) is dual-licensed under the LGPL and MPL 1.1.

We think this extension might be useful for other people outside of
Hyves as well, and publishing this in PECL can make it more visible.
Thus this is a request for comment for a possible inclusion in the
repository.


Lorenzo Castelli