enable 'inline_defnode_calls' optimisation for benchmarks (even though they...

enable 'inline_defnode_calls' optimisation for benchmarks (even though they don't benefit currently)

Demos/benchmarks/setup.py

 from distutils.core import setup
 from Cython.Build import cythonize
 
+directives = {
+    'optimize.inline_defnode_calls': True
+}
+
 setup(
   name = 'benchmarks',
-  ext_modules = cythonize("*.py", language_level=3, annotate=True),
+  ext_modules = cythonize("*.py", language_level=3, annotate=True,
+                          compiler_directives=directives),
 )