added perf test for cv::erode

modules/imgproc/perf/perf_integral.cpp

@@ -91,4 +91,3 @@ PERF_TEST_P( Size_MatType_OutMatDepth, integral3,
     SANITY_CHECK(sqsum);
     SANITY_CHECK(tilted);
 }
-

modules/imgproc/perf/perf_morph.cpp

@@ -0,0 +1,28 @@
+#include "perf_precomp.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace perf;
+
+typedef perf::TestBaseWithParam<cv::Size> MatSize;
+
+/*
+ void erode( InputArray src, OutputArray dst, InputArray kernel,
+             Point anchor=Point(-1,-1), int iterations=1,
+             int borderType=BORDER_CONSTANT,
+             const Scalar& borderValue=morphologyDefaultBorderValue() );
+*/
+PERF_TEST_P( MatSize, erode, ::testing::Values( TYPICAL_MAT_SIZES ))
+{
+    Size sz = GetParam();
+    int type = CV_8UC1;
+
+    Mat src(sz, type);
+    Mat dst(sz, type);
+
+    declare.in(src, WARMUP_RNG);
+
+    TEST_CYCLE(100) { erode(src, dst, Mat()); }
+
+    SANITY_CHECK(dst);
+}