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Testing Cache with time travel Lucas Neves Martins @nevemartins @resdigitais

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Rails Caching Rails ActiveSupport Request Dalli MemCached https://github.com/mperham/dalli

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Performance? 15.000ms Without Cache With Cache 00.050ms MemCached 00.005ms

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Setup production.rb

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Usage dashboard.rb

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Testing Cache should be created; Cache should be used; Cache should expire; Cache should be created again; Time Travel?

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Delorean! https://github.com/bebanjo/delorean

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Preparing dashboard_spec.rb

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Test #01 Test if we are hitting memcached dashboard_spec.rb

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Test #02 Test that we are NOT hitting memcached dashboard_spec.rb

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Cleaning Up dashboard_spec.rb Back to the Future!

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Other Caching Strategies

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Fragment Caching Russian Dolls Page Cache Action Cache Fragment Cache Fragment Cache Web Server Rack Rails

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Fragment Caching

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Alternatives Delorean => Timecop Memcached => Redis http://37signals.com/svn/posts/3113-how-key-based-cache- expiration-works Caching:

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Q & A http://resultadosdigitais.com.br/trabalhe-conosco Yay!