feat: 🎸 add code review

Author: KilJaeeun

getting-started/setup-building.rst

@@ -240,7 +240,18 @@ still build properly).
 Optimization
 ''''''''''''
 
-To get an optimized build of Python, ``configure --enable-optimizations --with-lto``. This sets the default make targets up to enable Profile Guided Optimization (PGO) and may be used to auto-enable Link Time Optimization (LTO) on some platforms. Note that configuration including this option takes time to configure. If you want to learn more about these options, please  see `Configure > Performance options <https://docs.python.org/3/using/configure.html?highlight=lto#performance-options>`_ ::
+If you are trying to improve the performance of Python, you will probably want
+to use an optimized build of CPython. It can take a lot longer to build CPython
+with optimizations enabled, and it's usually not necessary to do so. However,
+it's essential if you want accurate benchmark results for a proposed performance
+optimization. To get an optimized build of Python,
+``configure --enable-optimizations --with-lto``.
+This sets the default make targets up to enable Profile Guided Optimization(PGO)
+and may be used to auto-enable Link Time Optimization (LTO) on some platforms.
+If you want to learn more about these options,
+please  see :ref:`Configure options <python:configure-options>`.
+
+.. code:: console
 
    $ ./configure --enable-optimizations --with-lto