Perf test to exercise literal interning

tests/perf/test-func-tostring.js

@@ -2,19 +2,19 @@ if (typeof print !== 'function') { print = console.log; }
 
 function test() {
     var fn = function foo() {};
-    var i, t;
+    var i;
 
     for (i = 0; i < 1e6; i++) {
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
-        t = fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
+        fn.toString();
     }
 }
 

tests/perf/test-string-literal-intern.js

@@ -0,0 +1,35 @@
+/*
+ *  Exercise the internal mechanism for intern checking a string literal
+ *  pushed using e.g. duk_push_literal().  The ideal test target has a lot
+ *  of literal interning and minimal other activity.  No really good target
+ *  exists now, but 'String(Buffer.prototype)' just pushes a literal and
+ *  returns.
+ */
+
+if (typeof print !== 'function') { print = console.log; }
+
+function test() {
+    var S = String;
+    var BP = Buffer.prototype;
+    var i;
+
+    for (i = 0; i < 1e5; i++) {
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+        S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP); S(BP);
+    }
+}
+
+try {
+    test();
+} catch (e) {
+    print(e.stack || e);
+    throw e;
+}

tests/perf/test-symbol-tostring.js

@@ -0,0 +1,26 @@
+if (typeof print !== 'function') { print = console.log; }
+
+function test() {
+    var S = Symbol('foo');
+    var i;
+
+    for (i = 0; i < 1e6; i++) {
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+        String(S);
+    }
+}
+
+try {
+    test();
+} catch (e) {
+    print(e.stack || e);
+    throw e;
+}