_loader/loader: cythonize valid_chars_name

- Create a new _loader/utils.pyx cython module for functions cythonized
in the loader module.

- Move valid_chars_name from loader to utils and cythonize.

This function is called extensively, and easy to extract

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index ed211dd09..e68dc383c 100755
--- a/setup.py
+++ b/setup.py
@@ -398,6 +398,7 @@ def register_cython_module(module_name, dependencies=None):
 
 BUILD_EXTENSIONS = []
 
+register_cython_module("buildstream._loader._loader")
 register_cython_module("buildstream._yaml")
 register_cython_module("buildstream._variables", dependencies=["buildstream._yaml"])