perf(build): parallelize cython extension compilation (#1689)

bdraco · web-flow · commit 1ea6b940ecbf · 2026-05-16T14:16:32.000-07:00
diff --git a/build_ext.py b/build_ext.py
@@ -46,6 +46,8 @@
 
 class BuildExt(build_ext):
     def build_extensions(self) -> None:
+        if self.parallel is None:  # type: ignore[has-type]
+            self.parallel = os.cpu_count() or 1
         try:
             super().build_extensions()
         except Exception:
