add benchmark for SliceToString

Author: vadiminshakov

stringutils_test.go

@@ -1,6 +1,7 @@
 package stringutils
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -176,3 +177,47 @@ func TestHasSuffixSlice(t *testing.T) {
 		})
 	}
 }
+
+func BenchmarkSliceToString(b *testing.B) {
+	tmpl := []any{[]byte("fdjndfg")}
+	b.Run("unsafe (small slice)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			SliceToString(tmpl)
+		}
+	})
+	b.Run("type assert (small slice)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			sliceToStringAllocs(tmpl)
+		}
+	})
+
+	for i := 0; i < 20; i++ {
+		tmpl = append(tmpl, tmpl...)
+	}
+
+	b.Run("unsafe (big slice)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			SliceToString(tmpl)
+		}
+	})
+	b.Run("type assert (big slice)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			sliceToStringAllocs(tmpl)
+		}
+	})
+}
+
+func sliceToStringAllocs(s []any) []string {
+	if len(s) == 0 {
+		return nil
+	}
+	strSlice := make([]string, len(s))
+	for i, v := range s {
+		if vb, ok := v.([]byte); ok {
+			strSlice[i] = string(vb)
+			continue
+		}
+		strSlice[i] = fmt.Sprintf("%v", v)
+	}
+	return strSlice
+}