That's what I originally had and everyone freaked out!

Sent from my iPhone

> On Dec 2, 2013, at 9:37 PM, Chris Eppstein <notifications@github.com> wrote:
> 
> In compass.gemspec:
> 
> > @@ -16,7 +16,8 @@ Gem::Specification.new do |gemspec|
> >    gemspec.add_dependency 'sass', '>= 3.2.5', '< 3.4'
> >    gemspec.add_dependency 'chunky_png', '~> 1.2'
> >    gemspec.add_dependency 'listen', '~> 1.0.0'
> > -
> > +  gemspec.add_dependency "thread_safe", "~> 0.1.0"
> Reason: I had some serious performance issues with it at work and I just don't think a complex dependency is necessary here because a simple mutex around reading or writing to the cache is good enough.
> 
> —
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