Merge pull request #1078 from MartinNowak/gcBench

add new GC benchmark

benchmark/gcbench/conmsg.d

@@ -0,0 +1,95 @@
+/**
+ * This benchmarks GC in a producer-consumer program.
+ *
+ * Copyright: Copyright Martin Nowak 2014 -.
+ * License:   $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
+ * Authors:   Martin Nowak
+ */
+import std.algorithm, std.concurrency, std.conv, std.file, std.json, std.range;
+
+JSONValue buildVal(in dchar[] word)
+{
+    JSONValue[string] res;
+    res["word"] = word.to!string;
+    res["length"] = word.length;
+    auto pos = new size_t[word.length];
+    foreach (i; 0 .. pos.length)
+        pos[i] = i;
+    res["array"] = pos;
+    return JSONValue(res);
+}
+
+void producer(Tid consumer)
+{
+    auto text = cast(string)read("extra-files/dante.txt");
+    foreach (word; text.splitter.map!(to!(dchar[])))
+    {
+        foreach (_; 0 .. 3)
+        {
+            immutable val = buildVal(word);
+            consumer.send(val);
+            if (!nextPermutation(word)) break;
+        }
+    }
+}
+
+void serialize(in JSONValue val, ref ubyte[] buf)
+{
+    with (JSON_TYPE) switch (val.type)
+    {
+    case OBJECT:
+        foreach (k, v; val.object)
+        {
+            buf ~= cast(ubyte[])k;
+            serialize(v, buf);
+        }
+        break;
+
+    case ARRAY:
+        foreach (v; val.array)
+            serialize(v, buf);
+        break;
+
+    case UINTEGER:
+        ulong v = val.uinteger;
+        buf ~= (cast(ubyte*)&v)[0 .. v.sizeof];
+        break;
+
+    case STRING:
+        buf ~= cast(ubyte[])val.str;
+        break;
+
+    default:
+        assert(0);
+    }
+}
+
+struct Socket
+{
+    static void send(ubyte[] buf) { _buf = buf; }
+    static ubyte[] _buf; // keep a reference
+}
+
+void log(string s)
+{
+    __gshared size_t dummy;
+    dummy = s.length;
+}
+
+void consumer()
+{
+    scope (failure) assert(0);
+    while (true)
+    {
+        auto msg = receiveOnly!(Variant);
+        if (msg.peek!OwnerTerminated) return;
+        auto val = msg.get!(immutable JSONValue);
+        ubyte[] buf; serialize(val, buf);
+        Socket.send(buf);
+    }
+}
+
+void main(string[] args)
+{
+    producer(spawn(&consumer));
+}