cache converted hscript from ktxt2

src/kiss/KissInterp.hx

@@ -48,8 +48,23 @@ class KissInterp extends Interp {
         variables.set("kiss", {});
     }
 
+    public var cacheConvertedHScript = false;
+
     public function evalKiss(kissStr:String):Dynamic {
-        return evalHaxe(Prelude.convertToHScript(kissStr));
+        #if !(sys || hxnodejs)
+        if (cacheConvertedHScript) {
+            throw "Cannot used cacheConvertedHScript on a non-sys target";
+        }
+        #end
+
+        var convert =
+            #if (sys || hxnodejs)
+            if (cacheConvertedHScript) {
+                Prelude.cachedConvertToHScript;
+            } else
+            #end
+                Prelude.convertToHScript;
+        return evalHaxe(convert(kissStr));
     }
 
     public function evalHaxe(hscriptStr:String):Dynamic {

src/kiss/Prelude.hx

@@ -506,6 +506,10 @@ class Prelude {
         #end
     }
 
+    #if (sys || hxnodejs)
+    public static var cachedConvertToHScript:String->String = cast(fsMemoize(convertToHScript, "convertToHScript"));
+    #end
+
     public static function getTarget():KissTarget {
         return #if cpp
             Cpp;