diff --git a/src/Dodge/DownscaleSize.hs b/src/Dodge/DownscaleSize.hs
new file mode 100644
index 000000000..69185e6e9
--- /dev/null
+++ b/src/Dodge/DownscaleSize.hs
@@ -0,0 +1,5 @@
+module Dodge.DownscaleSize where
+
+downSize :: Int
+{-# INLINE downSize #-}
+downSize = 8
diff --git a/src/Geometry/Triangulate.hs b/src/Geometry/Triangulate.hs
new file mode 100644
index 000000000..63dadc77e
--- /dev/null
+++ b/src/Geometry/Triangulate.hs
@@ -0,0 +1,20 @@
+{-# LANGUAGE BangPatterns #-}
+
+module Geometry.Triangulate where
+
+import Data.List
+
+polyToTris :: [s] -> [s]
+{-# INLINEABLE polyToTris #-}
+polyToTris (x : xs) = foldl' (f x) [] $ zip xs $ tail xs
+  where
+    f a ls (b, c) = a : b : c : ls
+polyToTris _ = []
+
+-- kept as an example benchmark
+polyToTris'' :: [s] -> [s]
+polyToTris'' (a : as) = go a as
+  where
+    go !x (y : z : ys) = x : y : z : go x (z : ys)
+    go _ _ = []
+polyToTris'' _ = []