diff --git a/src/Shader/Poke.hs b/src/Shader/Poke.hs
index e5440b5a6..c5bbca09c 100644
--- a/src/Shader/Poke.hs
+++ b/src/Shader/Poke.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE TupleSections #-}
+{-# LANGUAGE BangPatterns #-}
 module Shader.Poke
     ( pokeArrayOff
     , pokeVX
@@ -54,10 +55,11 @@ pokeVerxs :: PicShads VBO -> [Verx] -> IO (PicShads Int)
 pokeVerxs vbos vxs0 = go vxs0 (pure 0)
   where
     go [] count = return count
-    go (vx:vxs) count = pokeVerx vbos count vx >> go vxs (addCountVerx count vx)
+    go (!vx:vxs) count = pokeVerx vbos count vx >> go vxs (addCountVerx count vx)
 
 -- this is very brittle, but want to optimise speed if possible here
 pokeVerx :: PicShads VBO -> PicShads Int -> Verx -> IO ()
+{-# INLINE pokeVerx #-}
 pokeVerx vbos offsets Verx{_vxPos=thePos,_vxCol=theCol,_vxType=theType} = case theType of
     PolyV -> poke34 (plusPtr (_vboPtr $ _psPoly vbos) (_psPoly offsets * 7 * floatSize)) thePos theCol
     PolyzV x        -> poke34 thePtr thePos theCol
@@ -85,6 +87,7 @@ pokeVerx vbos offsets Verx{_vxPos=thePos,_vxCol=theCol,_vxType=theType} = case t
     EllV            -> poke34 (plusPtr (_vboPtr $ _psEll vbos) (_psEll offsets * 7 * floatSize)) thePos theCol
 
 poke34 :: Ptr Float -> Point3 -> Point4 -> IO ()
+{-# INLINE poke34 #-}
 poke34 ptr (a,b,c) (d,e,f,g) = do
     pokeElemOff ptr 0 a
     pokeElemOff ptr 1 b
@@ -95,6 +98,7 @@ poke34 ptr (a,b,c) (d,e,f,g) = do
     pokeElemOff ptr 6 g
 
 addCountVerx :: PicShads Int -> Verx -> PicShads Int
+{-# INLINE addCountVerx #-}
 addCountVerx ps@PicShads 
     { _psPoly   = sPoly 
     , _psPolyz  = sPolyz
@@ -171,10 +175,11 @@ pokeLayVerxs :: PicShads VBO -> [Verx] -> IO (IM.IntMap (PicShads Int))
 pokeLayVerxs vbos vxs0 = go vxs0 (IM.fromList $ (, pure 0) <$> [0..5])
   where
     go [] count = return count
-    go (vx:vxs) count = pokeLayVerx vbos count vx >> go vxs (addLayCountVerx count vx)
+    go (!vx:vxs) count = pokeLayVerx vbos count vx >> go vxs (addLayCountVerx count vx)
 
 -- this is very brittle, but want to optimise speed if possible here
 pokeLayVerx :: PicShads VBO -> IM.IntMap (PicShads Int) -> Verx -> IO ()
+{-# INLINE pokeLayVerx #-}
 pokeLayVerx vbos imoffsets Verx{_vxPos=thePos,_vxCol=theCol,_vxType=theType, _vxLayer = theLay} = case theType of
     PolyV -> poke34 (plusPtr (_vboPtr $ _psPoly vbos) ((_psPoly offsets + layOff) * 7 * floatSize)) thePos theCol
     PolyzV x        -> poke34 thePtr thePos theCol
@@ -205,6 +210,7 @@ pokeLayVerx vbos imoffsets Verx{_vxPos=thePos,_vxCol=theCol,_vxType=theType, _vx
     offsets = imoffsets IM.! theLay
 
 addLayCountVerx :: IM.IntMap (PicShads Int) -> Verx -> IM.IntMap (PicShads Int)
+{-# INLINE addLayCountVerx #-}
 addLayCountVerx m vx = IM.adjust f (_vxLayer vx) m
   where
     f = flip addCountVerx vx