diff --git a/benchmarks/3d/coin.geo b/benchmarks/3d/coin.geo
index 75db8b37cb7b441864c0139095dd11a663c62fec..fbd5204f0d91630bf88c09d41a270b749b3696b3 100644
--- a/benchmarks/3d/coin.geo
+++ b/benchmarks/3d/coin.geo
@@ -1,3 +1,18 @@
+/*
+# gmsh benchmarks/3d/coin.geo -o aa.msh -3 -clscale
+# AuthenticAMD cpu MHz : 1466.431
+# clscale nod elm time
+1     250    1049    0.26
+0.5   1635   7871    1.89
+0.35  4575   23090   6.18
+0.3   6943   36284   9.8
+0.25  11572  62527   17.61
+0.2   21939  121678  39
+0.15  50181  287946  111.75
+0.125 85025  496118  233.04
+0.1   162625 965107  610.37
+0.085 261542 1568048 1285.29
+*/
 lcar1 = .2;
 
 Point(newp) = {0.5,0.5,0.5,lcar1}; /* Point      1 */