add image resize benchmark

go/images/resizing_test.go

@@ -0,0 +1,21 @@
+package images
+
+import (
+	"testing"
+	"io/ioutil"
+)
+
+
+
+func BenchmarkResizing(b *testing.B){
+	fName := "sample1.jpg"
+	data, _ := ioutil.ReadFile(fName)
+	ext := "jpg"
+	w := 0
+	h := 355
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Resized(ext, data, w, h)
+		b.SetBytes(int64(len(data)))
+	}
+}