Remove/avoid redundant function calls

Signed-off-by: Marcel Bargull <[email protected]>

conda_build/metadata.py

@@ -1664,7 +1664,6 @@ def build_id(self):
             raise RuntimeError(
                 f"Couldn't extract raw recipe text for {self.name()} output"
             )
-        raw_recipe_text = self.extract_package_and_build_text()
         raw_manual_build_string = re.search(r"\s*string:", raw_recipe_text)
         # user setting their own build string.  Don't modify it.
         if manual_build_string and not (
@@ -2640,12 +2639,13 @@ def get_loop_vars(self):
         return variants.get_vars(_variants, loop_only=True)
 
     def get_used_loop_vars(self, force_top_level=False, force_global=False):
+        loop_vars = set(self.get_loop_vars())
         return {
             var
             for var in self.get_used_vars(
                 force_top_level=force_top_level, force_global=force_global
             )
-            if var in self.get_loop_vars()
+            if var in loop_vars
         }
 
     def get_rendered_recipe_text(

conda_build/variants.py

@@ -697,15 +697,16 @@ def get_package_variants(recipedir_or_metadata, config=None, variants=None):
 def get_vars(variants, loop_only=False):
     """For purposes of naming/identifying, provide a way of identifying which variables contribute
     to the matrix dimensionality"""
+    first_variant, *other_variants = variants
     special_keys = {"pin_run_as_build", "zip_keys", "ignore_version"}
-    special_keys.update(set(ensure_list(variants[0].get("extend_keys"))))
+    special_keys.update(set(ensure_list(first_variant.get("extend_keys"))))
     loop_vars = [
         k
-        for k in variants[0]
+        for k, v in first_variant.items()
         if k not in special_keys
         and (
             not loop_only
-            or any(variant[k] != variants[0][k] for variant in variants[1:])
+            or any(variant[k] != v for variant in other_variants)
         )
     ]
     return loop_vars