experiments in python to compare speeds of functions that use loops vs loops within lists

loops_lists_and_sums.ipynb

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   "cell_type": "code",
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   "source": [
    "import random\n",
    "RandInt = random.SystemRandom().randint\n",
    "\n",
    "def proc1(x):\n",
    "    sB, sA = 0, 0\n",
    "    for I in range(x):\n",
    "        sB, sA =  I + 1, I\n",
    "    return sB\n",
    "    \n",
    "\n",
    "def proc2(x):\n",
    "    return [[I+1, I] for I in range(x)][-1][-1]\n",
    "\n",
    "def proc3(x):\n",
    "    s = 0\n",
    "    for I in range(x):\n",
    "        s += I\n",
    "    return s\n",
    "\n",
    "def proc4(x):\n",
    "    return sum([I for I in range(x)])"
   ]
  },
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   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "testIters = 10000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1.18 ms ± 48.5 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)\n"
     ]
    }
   ],
   "source": [
    "timeit proc1(testIters)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2.01 ms ± 135 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)\n"
     ]
    }
   ],
   "source": [
    "timeit proc2(testIters)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "969 µs ± 57.8 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)\n"
     ]
    }
   ],
   "source": [
    "timeit proc3(testIters)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "738 µs ± 63.6 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)\n"
     ]
    }
   ],
   "source": [
    "timeit proc4(testIters)"
   ]
  }
 ],
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