{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Time Magics\n",
    "\n",
    "There are magics for timing execution of code with a similar syntax to the standard ones in Python."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%time 2**128"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "You are able to execute few statements in single line."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%time a = [10,20,30,40,50]; a= a.sum(); a*10;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Time measurement in cell mode"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%%time \n",
    "a = [10,20,30,40,50]; \n",
    "a= a.sum(); \n",
    "a*10;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Function `%time` provides very basic timing functionality.   \n",
    "Use the timeit magic for more control over the measurement.  \n",
    "Time execution of a Python statement or expression  \n",
    "\n",
    "Usage, in line mode:\n",
    "\n",
    "```%timeit [-n<N> -r<R> -q] statement```\n",
    "\n",
    "or in cell mode:\n",
    "\n",
    "```%%timeit [-n<N> -r<R> -q] \n",
    "code \n",
    "code...```\n",
    "\n",
    "Options:  \n",
    "-n<N>: execute the given statement <N> times in a loop. If this value is not given, a fitting value is chosen.  \n",
    "-r<R>: repeat the loop iteration <R> times and take the best result. Default: 3  \n",
    "-q: Quiet, do not print result.\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%timeit -n10 -r3 sin(100)*cos(123)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%timeit -r3 sin(100)*cos(123)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%timeit -r3 -n1 sleep(1000)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%%timeit -r3 -n10\n",
    "a = 15;\n",
    "b = 111;\n",
    "a * b;"
   ]
  }
 ],
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