diff --git a/roaring/roaring.go b/roaring/roaring.go
index 256fa8804..a34aec163 100644
--- a/roaring/roaring.go
+++ b/roaring/roaring.go
@@ -2124,6 +2124,7 @@ func intersectArrayBitmap(a, b *container) *container {
 			output.array = append(output.array, va)
 		}
 	}
+	output.n = len(output.array)
 	return output
 }
 
@@ -2680,26 +2681,17 @@ func differenceRunRun(a, b *container) *container {
 
 func differenceArrayBitmap(a, b *container) *container {
 	output := &container{container_type: ContainerArray}
-	itr := newBufBitmapIterator(newBitmapIterator(b.bitmap))
-	for i := 0; i < len(a.array); {
-		va := a.array[i]
-		vb, eof := itr.next()
-		if eof {
-			output.add(va)
-			i++
-			continue
-		}
+	for _, va := range a.array {
+		bmidx := va / 64
+		bidx := va % 64
+		mask := uint64(1) << bidx
+		b := b.bitmap[bmidx]
 
-		if va < vb {
-			output.add(va)
-			i++
-			itr.unread()
-		} else if va > vb {
-			// nop
-		} else {
-			i++
+		if mask&^b > 0 {
+			output.array = append(output.array, va)
 		}
 	}
+	output.n = len(output.array)
 	return output
 }
 
diff --git a/roaring/roaring_internal_test.go b/roaring/roaring_internal_test.go
index 8af1cc987..aecbb9975 100644
--- a/roaring/roaring_internal_test.go
+++ b/roaring/roaring_internal_test.go
@@ -2498,7 +2498,6 @@ func TestIntersectArrayBitmap(t *testing.T) {
 		b.container_type = ContainerBitmap
 		ret1 := intersectArrayBitmapOld(a, b).array
 		ret2 := intersectArrayBitmap(a, b).array
-		fmt.Println("ret1", ret1, "ret2", ret2, "test.exp", test.exp)
 		if len(ret1) == 0 && len(ret2) == 0 && len(test.exp) == 0 {
 			continue
 		}