Perf test updates for hex enc/dec fast path

tests/perf/test-hex-encode.js

@@ -18,7 +18,7 @@ function test() {
 
     print(tmp2.length);
     print('run');
-    for (i = 0; i < 10000; i++) {
+    for (i = 0; i < 5000; i++) {
         Duktape.enc('hex', tmp2);
     }
 }

tests/perf/test-hex-encode.py

@@ -15,7 +15,7 @@ def test():
 
 	print(len(tmp2))
 	print('run')
-	for i in xrange(10000):
+	for i in xrange(5000):
 		ign = tmp2.encode('hex')
 
 test()

tests/perf/test-json-fake-message.js

@@ -0,0 +1,35 @@
+/*
+ *  Simulate creation and JSON serialization of a fake JSONRPC message.
+ */
+
+function test() {
+    var i;
+    var msg;
+    var bytes;
+    var ign;
+
+    bytes = Duktape.Buffer(4096);
+    for (i = 0; i < bytes.length; i++) {
+        bytes[i] = i;
+    }
+    for (i = 0; i < 1e5; i++) {
+        msg = {
+            jsonrpc: '2.0',
+            id: 'dummy',
+            method: 'FakeMethod',
+            params: {
+                client: 'dummy client',
+                timestamp: Date.now(),
+                data: Duktape.enc('base64', bytes)
+            }
+        };
+        ign = JSON.stringify(msg);
+    }
+    print(ign);
+}
+try {
+    test();
+} catch (e) {
+    print(e.stack || e);
+    throw e;
+}