Cache optimization status getter in mjsunit.js

test/mjsunit/mjsunit.js

Index: test/mjsunit/mjsunit.js
diff --git a/test/mjsunit/mjsunit.js b/test/mjsunit/mjsunit.js
index a5f65e24e75cc6279a3650407134ab493fea85bc..121b7e0a0e2043952017a02759706806bddaaf4d 100644
--- a/test/mjsunit/mjsunit.js
+++ b/test/mjsunit/mjsunit.js
@@ -371,11 +371,18 @@ var assertUnoptimized;
     throw new MjsUnitAssertionError(message);
   };
 
+  var OptimizationStatusImpl = undefined;
+
   var OptimizationStatus = function(fun, sync_opt) {
-    try {
-      return eval("%GetOptimizationStatus(fun, sync_opt);");
-    } catch (e) {
-      throw new Error("natives syntax not allowed");
+    if (OptimizationStatusImpl === undefined) {
+      try {
+        OptimizationStatusImpl = new Function(
+            "fun", "sync", "return %GetOptimizationStatus(fun, sync);");
+      } catch (e) {
+        throw new Error("natives syntax not allowed");
+      }
+    } else {
+      OptimizationStatusImpl(fun, sync_opt);
     }
   }