testing: benchmarks moved to separate files

mapper_bench_test.go

@@ -0,0 +1,22 @@
+// Copyright (C) 2017 ScyllaDB
+// Use of this source code is governed by a ALv2-style
+// license that can be found in the LICENSE file.
+
+package gocqlx
+
+import (
+	"strings"
+	"testing"
+)
+
+func BenchmarkSnakeCase(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		snakeCase(snakeTable[b.N%len(snakeTable)].N)
+	}
+}
+
+func BenchmarkToLower(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		strings.ToLower(snakeTable[b.N%len(snakeTable)].N)
+	}
+}