diff --git a/tools/cheat-builder/make-acl.go b/tools/cheat-builder/make-acl.go
index 1b3bc65..20d36bc 100644
--- a/tools/cheat-builder/make-acl.go
+++ b/tools/cheat-builder/make-acl.go
@@ -8,6 +8,7 @@ import (
 	"strings"
 	"bytes"
 	"sort"
+	"time"
 )
 
 type Serial struct {
@@ -225,9 +226,7 @@ func lade(locks []Lock, serial string, order string) Packed {
 
 	var ut_push = func(tr []byte) uint16 {
 		off := len(strtable)
-		for _, v := range tr {
-			strtable = append(strtable, v)
-		}
+		strtable = append(strtable, tr...)
 		strtable = append(strtable, 0)
 		return uint16(off)
 	}
@@ -238,7 +237,6 @@ func lade(locks []Lock, serial string, order string) Packed {
 		idx := find_index(strtable, []byte(tr))
 		var off uint16
 		if idx < 0 { off = ut_push([]byte(tr)) } else { off = uint16(idx) } 
-		//uint16(idx < 0 ? ut_push([]byte(tr)) : idx)
 		strcache[tr] = off
 		return off
 	}
@@ -258,16 +256,12 @@ func lade(locks []Lock, serial string, order string) Packed {
 		}
 
 		retval := uint16(len(idxtable))
-		for _, v := range list {
-			idxtable = append(idxtable, v)
-		}
+		idxtable = append(idxtable, list...)
 		return retval*2
 	}
 	var add_command = func(list []uint32) uint32 {
 		retval := len(cmdtable)
-		for _, v := range list {
-			cmdtable = append(cmdtable, v)
-		}
+		cmdtable = append(cmdtable, list...)
 		return uint32(retval*4)
 	}
 
@@ -640,6 +634,7 @@ func format( cheats []Cheat ) []byte {
 }
 
 func main() {
+	begin := time.Now()
 	list, err := loadlist()
 	if err != nil {
 		fmt.Println(err)
@@ -647,7 +642,7 @@ func main() {
 	}
 
 	roms := transform(list)
-	fmt.Println("all rom has", len(roms))
+	fmt.Println("all rom has", len(roms), time.Now().Sub(begin).Milliseconds())
 
 	idx := make(map[string][]Packed, 0)
 	for _, rom := range roms {