Query Cache
Rails 2.0 will introduce a query cache. This thing is just a simple cache of sql queries to reduce trips to the database for identical things.
This project is a plugin that just copies the query cache code and its tests so that it can be used in older versions of Rails, namely 1.2.3. There isn’t anything original here :) Just lots of copy and paste from the edge branch.
Thanks to everyone that actually did the real work on getting a query cache together. DHH and Tobias are the main committers to this I believe.
UNIT TESTING
As far as unit testing the plugin. It makes the assumption that you have Rails frozen inside RAILS_ROOT/vendor/rails. It reuses the fixtures and models that Rails uses for the framework. It also assumes you are using mysql locally to test, and you have the activerecord_unittest and activerecord_unittest2 databases as well as the rails@localhost user setup.
NOTE: This description has been extracted from the Plugin README and so the formatting may need updating to make browser friendly
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