Performance tuning

[Tobias Lütke]

I created a new performance directory in the liquid github that
contains a shopify compatibility layer and some real world liquid
templates. It's hooked up to ruby-prof and there is a rake task that
executes it all, renders the templates and loads the results into
KCacheGrind. I haven't had a lot of time to go through the results but
I already found some really good performance improvements.

Anyone who is interested in speeding up Liquid please have a look. If
you are on OSX you can install everything you need with the following
commands:

gem install ruby-prof

port install kdelibs3 kcachegrind
sudo -R chmod 777 ~/.kde

cd liquid

rake profile:grind

note that you have to have X11 for osx installed.

Regards
-- tobi