From 05bd6b7bcd5e1e962413afe66564f2b60b0178e6 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 21 Mar 2013 13:12:41 +0100
Subject: [PATCH] bench: add child process read perf benchmark

---
 benchmark/misc/child-process-read.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 benchmark/misc/child-process-read.js

diff --git a/benchmark/misc/child-process-read.js b/benchmark/misc/child-process-read.js
new file mode 100644
index 0000000000..894dd55d30
--- /dev/null
+++ b/benchmark/misc/child-process-read.js
@@ -0,0 +1,28 @@
+var common = require('../common.js');
+var bench = common.createBenchmark(main, {
+  len: [64, 256, 1024, 4096, 32768],
+  dur: [5]
+});
+
+var spawn = require('child_process').spawn;
+function main(conf) {
+  bench.start();
+
+  var dur = +conf.dur;
+  var len = +conf.len;
+
+  var msg = '"' + Array(len).join('.') + '"';
+  var options = { 'stdio': ['ignore', 'ipc', 'ignore'] };
+  var child = spawn('yes', [msg], options);
+
+  var bytes = 0;
+  child.on('message', function(msg) {
+    bytes += msg.length;
+  });
+
+  setTimeout(function() {
+    child.kill();
+    var gbits = (bytes * 8) / (1024 * 1024 * 1024);
+    bench.end(gbits);
+  }, dur * 1000);
+}