Replaced diff_eq() with diff_eq_python() to see the influence

cython + cython 0.866ms
python + cython 3.81 ms
python + python 4.4 ms

10.ipynb

@@ -164,6 +164,12 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "def diff_eq_python(xi):\n",
+    "\n",
+    "    # dx/dt + x = 0\n",
+    "    return -xi\n",
+    "\n",
+    "\n",
     "def euler_python():\n",
     "\n",
     "    # initial values\n",
@@ -186,7 +192,7 @@
     "    dx_dt = 0\n",
     "    \n",
     "    for i in range(1, n):\n",
-    "        dx_dt = diff_eq(result_x[i-1])\n",
+    "        dx_dt = diff_eq_python(result_x[i-1])\n",
     "        result_x[i] = result_x[i-1] + dx_dt * delta_t\n",
     "        result_t[i] = result_t[i-1] + delta_t\n",
     "\n",