add more benchmarks

src/utils/utils.go

@@ -94,6 +94,15 @@ func IMOHashFile(fname string) (hash []byte, err error) {
 	return
 }
 
+var imofull = imohash.NewCustom(0, 0)
+
+// IMOHashFileFull returns imohash of full file
+func IMOHashFileFull(fname string) (hash []byte, err error) {
+	b, err := imofull.SumFile(fname)
+	hash = b[:]
+	return
+}
+
 // XXHashFile returns the xxhash of a file
 func XXHashFile(fname string) (hash256 []byte, err error) {
 	f, err := os.Open(fname)

src/utils/utils_test.go

@@ -35,6 +35,7 @@ func BenchmarkXXHash(b *testing.B) {
 		XXHashFile("bigfile.test")
 	}
 }
+
 func BenchmarkImoHash(b *testing.B) {
 	bigFile()
 	b.ResetTimer()
@@ -43,6 +44,14 @@ func BenchmarkImoHash(b *testing.B) {
 	}
 }
 
+func BenchmarkImoHashFull(b *testing.B) {
+	bigFile()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		IMOHashFileFull("bigfile.test")
+	}
+}
+
 func BenchmarkSha256(b *testing.B) {
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {