diff --git a/draw2d/curve/curve_float64.go b/draw2d/curve/curve_float64.go
index a8e21ea..c34c3ae 100644
--- a/draw2d/curve/curve_float64.go
+++ b/draw2d/curve/curve_float64.go
@@ -43,6 +43,8 @@ func (c *CubicCurveFloat64) Subdivide() (c1, c2 *CubicCurveFloat64) {
 	return
 }
 
+// subdivide the curve in straight lines using Casteljau subdivision 
+// and computing minimal distance tolerance
 func (c *CubicCurveFloat64) SegmentCasteljau() []float64{
 	// reinit segments
 	c.segments = make([]float64, 0, 2)
diff --git a/draw2d/curve/curve_test.go b/draw2d/curve/curve_test.go
index 97b687a..787f51b 100644
--- a/draw2d/curve/curve_test.go
+++ b/draw2d/curve/curve_test.go
@@ -7,11 +7,10 @@ import (
 
 
 var (
-
-	cf64Test1 = NewCubicCurveFloat64(0, 0, 20000, 0, 0, 20000, 20000, 20000)
+	cf64Test1 = NewCubicCurveFloat64(100, 100, 200, 100, 100, 200, 200, 200)
 )
 
-func BenchmarkCubicCurveCasteljauFloat64(b *testing.B) {
+func BenchmarkCubicCurveCasteljauTest1(b *testing.B) {
 	var s []float64
 	for i := 0; i < b.N; i++ {
         s = cf64Test1.SegmentCasteljau()