Update network_performance.rst

doc/network_performance.rst

@@ -6,6 +6,23 @@ To achieve these performance results we completely changed most of ethereum tran
 
 Results of this tuning you may see below:
 
+--test
+
+This is a test. Here is an equation:
+:math:`X_{0:5} = (X_0, X_1, X_2, X_3, X_4)`.
+Here is another:
+
+.. math::
+    :label: This is a label
+
+    \nabla^2 f =
+    \frac{1}{r^2} \frac{\partial}{\partial r}
+    \left( r^2 \frac{\partial f}{\partial r} \right) +
+    \frac{1}{r^2 \sin \theta} \frac{\partial f}{\partial \theta}
+    \left( \sin \theta \, \frac{\partial f}{\partial \theta} \right) +
+    \frac{1}{r^2 \sin^2\theta} \frac{\partial^2 f}{\partial \phi^2}
+
+
 --markup test:
 
 .. code-block:: python