From: Roger Pack <rogerdpack2@...>
Date: 2012-10-11T04:00:29+09:00
Subject: [ANN] google_hash v 0.7.0 released. Faster hashes for MRI.

Hello.
Pleased to announce v 0.7.0 of the google_hash gem has been released,
mostly thanks to a patch from rolve.

Changes:
  fixed building in linux with newer GCC's, fixed building in windows
with broken system command (?)
  bump internal google_hash version to 0.8.2

README/teaser:

The goal: a better hash for Ruby, either one that is faster or more
space efficient than ruby's default.
To attempt to accomplish this, this library wraps the google hash
sparse and dense hashes [1], which seem to perform much better
at least for the #each method.  It also creates some "specialized"
hashes, for instance, those that take an integer for their key,
for even better performance.

ruby 1.9.3p194 (2012-04-20 revision 35410) [i686-linux]
inserting 400000 objects

Ruby Standard Hash
populate integer        0.324
#each                   0.660
lookup int              0.083

GoogleHashDenseIntToRuby
populate integer        0.114
#each                   0.050
lookup int              0.080

see https://github.com/rdp/google_hash for more.
-roger-