diff --git a/tools/parse.go b/tools/parse.go
index fdeefd3..618737e 100644
--- a/tools/parse.go
+++ b/tools/parse.go
@@ -11,6 +11,10 @@ func ParseBytes(in []byte) any {
 	return ParseString(string(in))
 }
 
+var yesno = regexp.MustCompile("^(y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF)$")
+var yes = regexp.MustCompile("^(y|Y|yes|Yes|YES|true|True|TRUE|on|On|ON)$")
+var null = regexp.MustCompile("^(~|null|Null|NULL|none|None|NONE|nil|Nil|NIL)$")
+
 func ParseString(in string) any {
 	s := strings.TrimSpace(in)
 	if s == "" {
@@ -21,9 +25,6 @@ func ParseString(in string) any {
 		return s
 	}
 
-	yesno := regexp.MustCompile("^(y|Y|yes|Yes|YES|n|N|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF)$")
-	yes := regexp.MustCompile("^(y|Y|yes|Yes|YES|true|True|TRUE|on|On|ON)$")
-	null := regexp.MustCompile("^(~|null|Null|NULL|none|None|NONE|nil|Nil|NIL)$")
 	var j json.RawMessage
 	if null.MatchString(s) {
 		return nil