--- /dev/null
+++ libmalloc/libmalloc-374.120.1/tests/MallocBenchTest/MALLOC_BENCH/MallocBench/medium.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "CPUCount.h"
+#include "medium.h"
+#include <algorithm>
+#include <cstddef>
+#include <cstdlib>
+#include <strings.h>
+
+#include "mbmalloc.h"
+
+using namespace std;
+
+struct Object {
+    double* p;
+    size_t size;
+};
+
+void benchmark_medium(CommandLine& commandLine)
+{
+    size_t times = 1;
+
+    size_t vmSize = 1ul * 1024 * 1024 * 1024;
+    size_t objectSizeMin = 1 * 1024;
+    size_t objectSizeMax = 8 * 1024;
+    if (commandLine.isParallel())
+        vmSize /= cpuCount();
+
+    size_t objectCount = vmSize / objectSizeMin;
+
+    srandom(0); // For consistency between runs.
+
+    for (size_t i = 0; i < times; ++i) {
+        Object* objects = (Object*)mbmalloc(objectCount * sizeof(Object));
+        bzero(objects, objectCount * sizeof(Object));
+
+        for (size_t i = 0, remaining = vmSize; remaining > objectSizeMin; ++i) {
+            size_t size = min<size_t>(remaining, max<size_t>(objectSizeMin, random() % objectSizeMax));
+            objects[i] = { (double*)mbmalloc(size), size };
+            bzero(objects[i].p, size);
+            remaining -= size;
+        }
+
+        for (size_t i = 0; i < objectCount && objects[i].p; ++i)
+            mbfree(objects[i].p, objects[i].size);
+
+        mbfree(objects, objectCount * sizeof(Object));
+    }
+}