element: Move __expand_splits to cythonbschubert/optimize-splits

__expand_splits is a somewhat intensive method, that represents >1%
of the runtime.

Moving it to cython makes it 5 times faster.

This also requires exporting some 'Variables' symbols as public.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index c93cb44f3..daf10fff1 100755
--- a/setup.py
+++ b/setup.py
@@ -403,7 +403,7 @@ def register_cython_module(module_name, dependencies=None):
 BUILD_EXTENSIONS = []
 
 register_cython_module("buildstream.node")
-register_cython_module("buildstream._element")
+register_cython_module("buildstream._element", dependencies=["buildstream._variables"])
 register_cython_module("buildstream._loader._loader")
 register_cython_module("buildstream._loader.types", dependencies=["buildstream.node"])
 register_cython_module("buildstream._yaml", dependencies=["buildstream.node"])