Added performance tests for cv:phase and cv::SURF

modules/core/perf/perf_math.cpp

@@ -0,0 +1,21 @@
+#include "perf_precomp.hpp"
+
+using namespace std;
+using namespace cv;
+using namespace perf;
+
+typedef perf::TestBaseWithParam<size_t> VectorLength;
+
+PERF_TEST_P(VectorLength, phase32f, testing::Values(128, 1000, 128*1024, 512*1024, 1024*1024))
+{
+    int length = GetParam();
+    vector<float> X(length);
+    vector<float> Y(length);
+    vector<float> angle(length);
+
+    declare.in(X, Y, WARMUP_RNG).out(angle);
+
+    TEST_CYCLE(200) cv::phase(X, Y, angle, true);
+
+    SANITY_CHECK(angle);
+}