diff --git a/benches/plot.py b/benches/plot.py
index 6dd2102..c3c42a0 100644
--- a/benches/plot.py
+++ b/benches/plot.py
@@ -9,18 +9,6 @@
 # benchmark 1..=10^max rays/triangles
 max = 4
 
-cdict = {'red':   [[0.0,  0.0, 0.0],
-                   [0.5,  1.0, 1.0],
-                   [1.0,  1.0, 1.0]],
-         'green': [[0.0,  0.0, 0.0],
-                   [0.25, 0.0, 0.0],
-                   [0.75, 1.0, 1.0],
-                   [1.0,  1.0, 1.0]],
-         'blue':  [[0.0,  0.0, 0.0],
-                   [0.5,  0.0, 0.0],
-                   [1.0,  1.0, 1.0]]
-}
-
 #newcmp = LinearSegmentedColormap('testCmap', segmentdata=cdict, N=256)
 cmap = LinearSegmentedColormap.from_list("speedup", ["red", "white", "green"], N=256)
 
@@ -37,7 +25,8 @@ def plot(colormaps):
             rays = mesh[it.multi_index[1]]
             samples = 11
             if triangles >= 100 and rays >= 100:
-                # these run longer so less intrinsic noise
+                # these run longer so less intrinsic noise; save time
+                # by sampling less
                 samples = 3
             proc = Popen([
                 "cargo",