numpy CPU cache demo

gistfile.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "42fdb6ce-1d7c-485f-a1d5-0d52375c4eee",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "18.703007650000018\n",
      "24.231060391000028\n",
      "26.28812021700014\n",
      "26.341477230000237\n"
     ]
    }
   ],
   "source": [
    "import timeit\n",
    "import numpy as np\n",
    "\n",
    "a = np.random.uniform(size=10**7)\n",
    "b = np.random.uniform(size=10**7)\n",
    "c = np.random.random(size=10**7)\n",
    "d = np.random.random(size=10**7)\n",
    "\n",
    "def clear_cache():\n",
    "    c@d\n",
    "\n",
    "def f1():\n",
    "    a@b\n",
    "    a@b\n",
    "    np.log(a)\n",
    "    np.log(a)\n",
    "\n",
    "def f2():\n",
    "    a@b\n",
    "    np.log(a)\n",
    "    a@b\n",
    "    np.log(a)\n",
    "\n",
    "def f3():\n",
    "    a@b\n",
    "    clear_cache()\n",
    "    a@b\n",
    "    clear_cache()\n",
    "    np.log(a)\n",
    "    clear_cache()\n",
    "    np.log(a)\n",
    "    clear_cache()\n",
    "\n",
    "def f4():\n",
    "    a@b\n",
    "    clear_cache()\n",
    "    np.log(a)\n",
    "    clear_cache()\n",
    "    a@b\n",
    "    clear_cache()\n",
    "    np.log(a)\n",
    "    clear_cache()\n",
    "\n",
    "print(timeit.timeit('f1()', number=100, globals=globals()))\n",
    "print(timeit.timeit('f2()', number=100, globals=globals()))\n",
    "print(timeit.timeit('f3()', number=100, globals=globals()))\n",
    "print(timeit.timeit('f4()', number=100, globals=globals()))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "f3c94093-e4c5-4239-970d-c1c3bad8f1ff",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.9.19"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}