QL code and tests for C#/C++/JavaScript.

javascript/ql/src/Performance/examples/NonLocalForIn.js

@@ -0,0 +1,5 @@
+function extend(dest, src) {
+    for (p in src)
+        dest[p] = src[p];
+    return dest;
+}

javascript/ql/src/Performance/examples/NonLocalForIn2.js

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+function combine(dest) {
+    var p;
+
+    function extend(src) {
+        for (p in src)
+            dest[p] = src[p];
+    }
+
+    for (var i=1; i<arguments.length; ++i)
+        extend(arguments[i]);
+
+    return dest;
+}

javascript/ql/src/Performance/examples/NonLocalForIn2Good.js

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+function combine(dest) {
+    function extend(src) {
+        for (var p in src)
+            dest[p] = src[p];
+    }
+
+    for (var i=1; i<arguments.length; ++i)
+        extend(arguments[i]);
+
+    return dest;
+}

javascript/ql/src/Performance/examples/NonLocalForInGood.js

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+function extend(dest, src) {
+    for (var p in src)
+        dest[p] = src[p];
+    return dest;
+}

javascript/ql/src/Performance/examples/ReassignParameterAndUseArguments.js

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+function sum(xs, start) {
+    if (arguments.length < 2)
+        start = 0;
+
+    var sum = start;
+    for (var i=0; i<xs.length; ++i)
+        sum += xs[i];
+
+    return sum;
+}

javascript/ql/src/Performance/examples/ReassignParameterAndUseArgumentsGood1.js

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+function sum(xs, start) {
+    if (typeof start === 'undefined')
+        start = 0;
+
+    var sum = start;
+    for (var i=0; i<xs.length; ++i)
+        sum += xs[i];
+
+    return sum;
+}

javascript/ql/src/Performance/examples/ReassignParameterAndUseArgumentsGood2.js

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+function sum(xs, _start) {
+    var start = arguments.length < 2 ? 0 : _start;
+
+    var sum = start;
+    for (var i=0; i<xs.length; ++i)
+        sum += xs[i];
+
+    return sum;
+}