From 7a46f3c939c59b64dbc0df1314ed186d595de939 Mon Sep 17 00:00:00 2001
From: Tiziano Zito <opossumnano@gmail.com>
Date: Mon, 5 Aug 2024 16:33:56 +0200
Subject: [PATCH] update puzzle with values from benchmark_python

---
 puzzle.ipynb | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/puzzle.ipynb b/puzzle.ipynb
index 58a767d..e8d2d75 100644
--- a/puzzle.ipynb
+++ b/puzzle.ipynb
@@ -31,8 +31,8 @@
    "source": [
     "# create a collection of time series\n",
     "# in real life, this data comes from an experiment/simulation\n",
-    "n_series = 30\n",
-    "len_one_series = 2**21  # ➔ 2^21 ≈ 2 millions (8Bytes x 2^21/2^20 [MB] = 16 MB)\n",
+    "n_series = 128\n",
+    "len_one_series = 2**15  # ➔ 2^15 = 32768 items (8 B x 2^15 = 262144 B = 256 K)\n",
     "time_series = []\n",
     "for idx in range(n_series):\n",
     "    time_series.append(np.zeros((len_one_series,1), dtype='float64'))"
@@ -52,9 +52,9 @@
    "outputs": [],
    "source": [
     "# how much memory does one time series need?\n",
-    "ts_size = time_series[0].nbytes/2**20 # -> 2^20 is 1MB\n",
-    "print('Size of one time series (MB):', ts_size)\n",
-    "print('Size of collection (MB):', n_series*ts_size)"
+    "ts_size = time_series[0].nbytes/2**10 # -> 2^10 is 1 K\n",
+    "print(f'Size of one time series: {int(ts_size)} K')\n",
+    "print(f'Size of collection: {int(n_series*ts_size/1024)} M')"
    ]
   },
   {
@@ -138,7 +138,9 @@
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "# on my machine: 2.2 ms vs 33.9 ms ≈ 15x slowdown!!!"
+   ]
   }
  ],
  "metadata": {