4. Behind the curtains.ipynb

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   "source": [
    "![Compiler](compiler.png)"
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    "![Compiler Stages](compiler-stages.png)"
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    "## Figuring out what is happening\n",
    "The stages of the compiler\n",
    "- `@code_lowered`\n",
    "- `@code_typed` & `@code_warntype`\n",
    "- `@code_llvm`\n",
    "- `@code_native`\n",
    "\n",
    "Where is a function defined\n",
    "`@which` & `@edit`"
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    "# A note on benchmarking\n",
    "Before you start refactoring your code, measure first!"
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    "## Tools\n",
    "1. BenchmarkTools.jl https://github.com/JuliaCI/BenchmarkTools.jl\n",
    "2. Profiler https://docs.julialang.org/en/latest/manual/profile/\n",
    "3. ProfileView.jl https://github.com/timholy/ProfileView.jl"
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