{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "14ea724a-be83-4452-ba62-31f2ee8cc2c9",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "VERSION = v\"1.8.0-DEV.43\"\n",
      "  5.267 μs (0 allocations: 0 bytes)\n",
      "  1.617 ms (78980 allocations: 1.36 MiB)\n",
      "  38.900 μs (4 allocations: 156.41 KiB)\n",
      "  44.600 μs (4 allocations: 156.41 KiB)\n",
      "  46.100 μs (4 allocations: 156.41 KiB)\n",
      "  5.283 μs (1 allocation: 32 bytes)\n",
      "  1.597 ms (78980 allocations: 1.36 MiB)\n"
     ]
    }
   ],
   "source": [
    "function g!(x, y)\n",
    "    for i in 1:length(x)\n",
    "        x[i] *= 3\n",
    "        y[i] += x[i]\n",
    "    end\n",
    "    x, y\n",
    "end\n",
    "\n",
    "function h!()\n",
    "    for i in 1:length(x_global)\n",
    "        x_global[i] *= 3\n",
    "        y_global[i] += x_global[i]\n",
    "    end\n",
    "end\n",
    "\n",
    "function f0()\n",
    "    x = randn(100, 100)\n",
    "    y = randn(100, 100)\n",
    "    x, y\n",
    "end\n",
    "\n",
    "function f1()\n",
    "    x = randn(100, 100)\n",
    "    y = randn(100, 100)    \n",
    "    g!(x, y)\n",
    "end\n",
    "\n",
    "function f2!(x = randn(100, 100), y = randn(100, 100))\n",
    "    g!(x, y)\n",
    "end\n",
    "\n",
    "function f3!()\n",
    "   g!(x_global, y_global)\n",
    "end\n",
    "\n",
    "function f4!()\n",
    "   h!()\n",
    "end\n",
    "\n",
    "using BenchmarkTools\n",
    "\n",
    "x_global = randn(100, 100)\n",
    "y_global = randn(100, 100)\n",
    "\n",
    "@show VERSION\n",
    "@btime g!($x_global, $y_global)\n",
    "@btime h!()\n",
    "@btime f0()\n",
    "@btime f1()\n",
    "@btime f2!()\n",
    "@btime f3!()\n",
    "@btime f4!()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "e8127bc5-49dc-4919-a540-60dffdcaf70c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "MethodInstance for h!()\n",
      "  from h!() in Main at In[1]:9\n",
      "Arguments\n",
      "  #self#\u001b[36m::Core.Const(h!)\u001b[39m\n",
      "Locals\n",
      "  @_2\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "  i\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "Body\u001b[36m::Nothing\u001b[39m\n",
      "\u001b[90m1 ─\u001b[39m %1  = Main.length(Main.x_global)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %2  = (1:%1)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       (@_2 = Base.iterate(%2))\n",
      "\u001b[90m│  \u001b[39m %4  = (@_2 === nothing)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %5  = Base.not_int(%4)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m└──\u001b[39m       goto #4 if not %5\n",
      "\u001b[90m2 ┄\u001b[39m %7  = @_2\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       (i = Core.getfield(%7, 1))\n",
      "\u001b[90m│  \u001b[39m %9  = Core.getfield(%7, 2)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %10 = Base.getindex(Main.x_global, i)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %11 = (%10 * 3)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       Base.setindex!(Main.x_global, %11, i)\n",
      "\u001b[90m│  \u001b[39m %13 = Base.getindex(Main.y_global, i)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %14 = Base.getindex(Main.x_global, i)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %15 = (%13 + %14)\u001b[91m\u001b[1m::Any\u001b[22m\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       Base.setindex!(Main.y_global, %15, i)\n",
      "\u001b[90m│  \u001b[39m       (@_2 = Base.iterate(%2, %9))\n",
      "\u001b[90m│  \u001b[39m %18 = (@_2 === nothing)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %19 = Base.not_int(%18)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m└──\u001b[39m       goto #4 if not %19\n",
      "\u001b[90m3 ─\u001b[39m       goto #2\n",
      "\u001b[90m4 ┄\u001b[39m       return nothing\n",
      "\n"
     ]
    }
   ],
   "source": [
    "@code_warntype h!()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "84462258-fdad-4068-959a-1c4336589dc2",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "MethodInstance for g!(::\u001b[0mMatrix{Float64}, ::\u001b[0mMatrix{Float64})\n",
      "  from g!(x, y) in Main at In[1]:1\n",
      "Arguments\n",
      "  #self#\u001b[36m::Core.Const(g!)\u001b[39m\n",
      "  x\u001b[36m::Matrix{Float64}\u001b[39m\n",
      "  y\u001b[36m::Matrix{Float64}\u001b[39m\n",
      "Locals\n",
      "  @_4\u001b[33m\u001b[1m::Union{Nothing, Tuple{Int64, Int64}}\u001b[22m\u001b[39m\n",
      "  i\u001b[36m::Int64\u001b[39m\n",
      "Body\u001b[36m::Tuple{Matrix{Float64}, Matrix{Float64}}\u001b[39m\n",
      "\u001b[90m1 ─\u001b[39m %1  = Main.length(x)\u001b[36m::Int64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %2  = (1:%1)\u001b[36m::Core.PartialStruct(UnitRange{Int64}, Any[Core.Const(1), Int64])\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       (@_4 = Base.iterate(%2))\n",
      "\u001b[90m│  \u001b[39m %4  = (@_4 === nothing)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %5  = Base.not_int(%4)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m└──\u001b[39m       goto #4 if not %5\n",
      "\u001b[90m2 ┄\u001b[39m %7  = @_4\u001b[36m::Tuple{Int64, Int64}\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       (i = Core.getfield(%7, 1))\n",
      "\u001b[90m│  \u001b[39m %9  = Core.getfield(%7, 2)\u001b[36m::Int64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %10 = Base.getindex(x, i)\u001b[36m::Float64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %11 = (%10 * 3)\u001b[36m::Float64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       Base.setindex!(x, %11, i)\n",
      "\u001b[90m│  \u001b[39m %13 = Base.getindex(y, i)\u001b[36m::Float64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %14 = Base.getindex(x, i)\u001b[36m::Float64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %15 = (%13 + %14)\u001b[36m::Float64\u001b[39m\n",
      "\u001b[90m│  \u001b[39m       Base.setindex!(y, %15, i)\n",
      "\u001b[90m│  \u001b[39m       (@_4 = Base.iterate(%2, %9))\n",
      "\u001b[90m│  \u001b[39m %18 = (@_4 === nothing)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m│  \u001b[39m %19 = Base.not_int(%18)\u001b[36m::Bool\u001b[39m\n",
      "\u001b[90m└──\u001b[39m       goto #4 if not %19\n",
      "\u001b[90m3 ─\u001b[39m       goto #2\n",
      "\u001b[90m4 ┄\u001b[39m %22 = Core.tuple(x, y)\u001b[36m::Tuple{Matrix{Float64}, Matrix{Float64}}\u001b[39m\n",
      "\u001b[90m└──\u001b[39m       return %22\n",
      "\n"
     ]
    }
   ],
   "source": [
    "@code_warntype g!(x_global, y_global)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "4885a2b6-f608-49c7-b2fb-f1d248edd345",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "CodeInfo(\n",
       "\u001b[90m1 ─\u001b[39m %1 = Main.x_global\u001b[36m::Any\u001b[39m\n",
       "\u001b[90m│  \u001b[39m %2 = Main.y_global\u001b[36m::Any\u001b[39m\n",
       "\u001b[90m│  \u001b[39m %3 = Main.g!(%1, %2)\u001b[36m::Tuple{Any, Any}\u001b[39m\n",
       "\u001b[90m└──\u001b[39m      return %3\n",
       ") => Tuple{Any, Any}"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "@code_typed f3!()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "2ffcd19e-bd18-491e-993f-66173d0c7595",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "CodeInfo(\n",
       "\u001b[90m1 ──\u001b[39m %1  = Base.arraylen(x)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %2  = Base.sle_int(1, %1)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %3  = Base.ifelse(%2, %1, 0)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %4  = Base.slt_int(%3, 1)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #3 if not %4\n",
       "\u001b[90m2 ──\u001b[39m       Base.nothing\u001b[90m::Nothing\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #4\n",
       "\u001b[90m3 ──\u001b[39m       goto #4\n",
       "\u001b[90m4 ┄─\u001b[39m %9  = φ (#2 => true, #3 => false)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %10 = φ (#3 => 1)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %11 = φ (#3 => 1)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %12 = Base.not_int(%9)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #10 if not %12\n",
       "\u001b[90m5 ┄─\u001b[39m %14 = φ (#4 => %10, #9 => %29)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %15 = φ (#4 => %11, #9 => %30)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %16 = Base.arrayref(true, x, %14)\u001b[36m::Float64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %17 = Base.mul_float(%16, 3.0)\u001b[36m::Float64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m       Base.arrayset(true, x, %17, %14)\u001b[90m::Matrix{Float64}\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %19 = Base.arrayref(true, y, %14)\u001b[36m::Float64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %20 = Base.arrayref(true, x, %14)\u001b[36m::Float64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %21 = Base.add_float(%19, %20)\u001b[36m::Float64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m       Base.arrayset(true, y, %21, %14)\u001b[90m::Matrix{Float64}\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %23 = (%15 === %3)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #7 if not %23\n",
       "\u001b[90m6 ──\u001b[39m       Base.nothing\u001b[90m::Nothing\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #8\n",
       "\u001b[90m7 ──\u001b[39m %27 = Base.add_int(%15, 1)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #8\n",
       "\u001b[90m8 ┄─\u001b[39m %29 = φ (#7 => %27)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %30 = φ (#7 => %27)\u001b[36m::Int64\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %31 = φ (#6 => true, #7 => false)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m│   \u001b[39m %32 = Base.not_int(%31)\u001b[36m::Bool\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       goto #10 if not %32\n",
       "\u001b[90m9 ──\u001b[39m       goto #5\n",
       "\u001b[90m10 ┄\u001b[39m %35 = Core.tuple(x, y)\u001b[36m::Tuple{Matrix{Float64}, Matrix{Float64}}\u001b[39m\n",
       "\u001b[90m└───\u001b[39m       return %35\n",
       ") => Tuple{Matrix{Float64}, Matrix{Float64}}"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "@code_typed g!(x_global, y_global)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "a6aec35a-ffb5-464f-a0df-bd7c7140809c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "MethodInstance for f3!()\n",
      "  from f3!() in Main at In[1]:32\n",
      "Arguments\n",
      "  #self#\u001b[36m::Core.Const(f3!)\u001b[39m\n",
      "Body\u001b[91m\u001b[1m::Tuple{Any, Any}\u001b[22m\u001b[39m\n",
      "\u001b[90m1 ─\u001b[39m %1 = Main.g!(Main.x_global, Main.y_global)\u001b[91m\u001b[1m::Tuple{Any, Any}\u001b[22m\u001b[39m\n",
      "\u001b[90m└──\u001b[39m      return %1\n",
      "\n"
     ]
    }
   ],
   "source": [
    "@code_warntype f3!()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "b2fcf0dd-69f9-4623-b0f6-a8c21aafe32d",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "jupytext": {
   "formats": "ipynb,jl:hydrogen"
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  "kernelspec": {
   "display_name": "Julia 1.8.0-DEV",
   "language": "julia",
   "name": "julia-1.8"
  },
  "language_info": {
   "file_extension": ".jl",
   "mimetype": "application/julia",
   "name": "julia",
   "version": "1.8.0"
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 },
 "nbformat": 4,
 "nbformat_minor": 5
}