shave some more time by calling cartesian_product directly rather t…

…han via `tupleize` #184

src/icepool/__init__.py

@@ -57,7 +57,7 @@
 
 from icepool.population.base import Population
 from icepool.population.die import implicit_convert_to_die, Die
-from icepool.collection.vector import tupleize, vectorize, Vector
+from icepool.collection.vector import cartesian_product, tupleize, vectorize, Vector
 from icepool.collection.symbols import Symbols
 from icepool.population.again import AgainExpression
 

src/icepool/creation_args.py

@@ -76,7 +76,8 @@ def expand_arg(
     elif arg is icepool.Reroll:
         return {}
     elif type(arg) == tuple:
-        arg = cast('T | icepool.Population[T]', icepool.tupleize(*arg))
+        arg = cast('T | icepool.Population[T]',
+                   icepool.cartesian_product(*arg, outcome_type=tuple))
         if type(arg) == tuple:
             return {arg: 1}  # type: ignore
         else:  # converted to Population