compression benchmarks

[Doug Cutting]

Sami Siren gives kudos for Hadoop's native compression:
http://blog.foofactory.fi/2006/12/my-fellow-nutch-developer-andrzej.html

Now we just need to add support for LZO...

http://compression.ca/act/act-summary.html

LZO is a standard library on linux, so it's implementation can mostly 
mirror the zlib implementation.

Doug