Proofread howto/perf_profiling.rst (#103530)

Author: verhovsky

Doc/howto/perf_profiling.rst

@@ -15,9 +15,9 @@ information about the performance of your application.
 that aid with the analysis of the data that it produces.
 
 The main problem with using the ``perf`` profiler with Python applications is that
-``perf`` only allows to get information about native symbols, this is, the names of
-the functions and procedures written in C. This means that the names and file names
-of the Python functions in your code will not appear in the output of the ``perf``.
+``perf`` only gets information about native symbols, that is, the names of
+functions and procedures written in C. This means that the names and file names
+of Python functions in your code will not appear in the output of ``perf``.
 
 Since Python 3.12, the interpreter can run in a special mode that allows Python
 functions to appear in the output of the ``perf`` profiler. When this mode is
@@ -28,8 +28,8 @@ relationship between this piece of code and the associated Python function using
 
 .. note::
 
-    Support for the ``perf`` profiler is only currently available for Linux on
-    selected architectures. Check the output of the configure build step or
+    Support for the ``perf`` profiler is currently only available for Linux on
+    select architectures. Check the output of the ``configure`` build step or
     check the output of ``python -m sysconfig | grep HAVE_PERF_TRAMPOLINE``
     to see if your system is supported.
 
@@ -52,11 +52,11 @@ For example, consider the following script:
     if __name__ == "__main__":
         baz(1000000)
 
-We can run ``perf`` to sample CPU stack traces at 9999 Hertz::
+We can run ``perf`` to sample CPU stack traces at 9999 hertz::
 
     $ perf record -F 9999 -g -o perf.data python my_script.py
 
-Then we can use ``perf`` report to analyze the data:
+Then we can use ``perf report`` to analyze the data:
 
 .. code-block:: shell-session
 
@@ -97,7 +97,7 @@ Then we can use ``perf`` report to analyze the data:
                             |          |          |                     |          |          |--2.97%--_PyObject_Malloc
     ...
 
-As you can see here, the Python functions are not shown in the output, only ``_Py_Eval_EvalFrameDefault`` appears
+As you can see, the Python functions are not shown in the output, only ``_Py_Eval_EvalFrameDefault``
 (the function that evaluates the Python bytecode) shows up. Unfortunately that's not very useful because all Python
 functions use the same C function to evaluate bytecode so we cannot know which Python function corresponds to which
 bytecode-evaluating function.
@@ -151,7 +151,7 @@ Instead, if we run the same experiment with ``perf`` support enabled we get:
 How to enable ``perf`` profiling support
 ----------------------------------------
 
-``perf`` profiling support can either be enabled from the start using
+``perf`` profiling support can be enabled either from the start using
 the environment variable :envvar:`PYTHONPERFSUPPORT` or the
 :option:`-X perf <-X>` option,
 or dynamically using :func:`sys.activate_stack_trampoline` and
@@ -192,7 +192,7 @@ Example, using the :mod:`sys` APIs in file :file:`example.py`:
 How to obtain the best results
 ------------------------------
 
-For the best results, Python should be compiled with
+For best results, Python should be compiled with
 ``CFLAGS="-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer"`` as this allows
 profilers to unwind using only the frame pointer and not on DWARF debug
 information. This is because as the code that is interposed to allow ``perf``