Profiling Ruby2. Why Profiling? Program analysis (often in space or time) What is my code doing on this path/request? (and why so slow??) What is the code doing in production? And while we're here, where did all my memory go? 3. The World of MRI Jealous of all the JVM goodness (e.g. VisualVM) Bits and pieces (memprof, etc.) 2.x brings a host of improvements
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