Added configurations and files for profile guided optimization (PGO).
diff --git a/PCbuild9/build_pgo.bat b/PCbuild9/build_pgo.bat
new file mode 100644
index 0000000..22de997
--- /dev/null
+++ b/PCbuild9/build_pgo.bat
@@ -0,0 +1,40 @@
+@echo off
+rem A batch program to build PGO (Profile guided optimization) by first
+rem building instrumented binaries, then running the testsuite, and
+rem finally building the optimized code.
+rem Note, after the first instrumented run, one can just keep on
+rem building the PGUpdate configuration while developing.
+
+setlocal
+set platf=Win32
+
+rem use the performance testsuite. This is quick and simple
+set job1=..\tools\pybench\pybench.py -n 1 -C 1 --with-gc
+set path1=..\tools\pybench
+
+rem or the whole testsuite for more thorough testing
+set job2=..\lib\test\regrtest.py
+set path2=..\lib
+
+set job=%job1%
+set clrpath=%path1%
+
+:CheckOpts
+if "%1"=="-p" (set platf=%2) & shift & shift & goto CheckOpts
+if "%1"=="-2" (set job=%job2%) & (set clrpath=%path2%) & shift & goto CheckOpts
+
+set folder=%platf%-pgo
+
+
+@echo on
+rem build the instrumented version
+call build -r -p %platf% -c PGInstrument
+
+rem remove .pyc files, .pgc files and execute the job
+%folder%\python.exe rmpyc.py %clrpath%
+del %folder%\*.pgc
+%folder%\python.exe %job%
+
+rem finally build the optimized version
+call build -r -p %platf% -c PGUpdate
+