Some speed improvements

stdlib/string.krak

@@ -88,11 +88,15 @@ obj string (Object, Serializable) {
         return this;
     }
     fun construct(str: *char): *string {
-        data.construct();
-        while(*str) {
-            data.addEnd(*str);
-            str += 1;
-        }
+        var len = 0
+        while (str[len] != 0) len++
+        data.construct(len);
+        data.set_size(len);
+        mem::memmove((data.getBackingMemory()) cast *void, (str) cast *void, (len) cast ulong)
+        /*while(*str) {*/
+            /*data.addEnd(*str);*/
+            /*str += 1;*/
+        /*}*/
         // no null terminator
         return this;
     }
@@ -118,8 +122,6 @@ obj string (Object, Serializable) {
     }
 
     fun operator=(str: ref string): void {
-        /*destruct();*/
-        /*data.copy_construct(&str.data)*/
         data = str.data
     }