1 files changed, 48 insertions, 0 deletions
diff --git a/benchmark/fs/readfile.js b/benchmark/fs/readfile.js
new file mode 100644
index 0000000000..38548ef647
--- /dev/null
+++ b/benchmark/fs/readfile.js
@@ -0,0 +1,48 @@
+// Call fs.readFile over and over again really fast.
+// Then see how many times it got called.
+// Yes, this is a silly benchmark.  Most benchmarks are silly.
+
+var path = require('path');
+var common = require('../common.js');
+var filename = path.resolve(__dirname, '.removeme-benchmark-garbage');
+var fs = require('fs');
+
+var bench = common.createBenchmark(main, {
+  dur: [1, 3],
+  len: [1024, 16 * 1024 * 1024],
+  concurrent: [1, 10]
+});
+
+function main(conf) {
+  var len = +conf.len;
+  try { fs.unlinkSync(filename); } catch (e) {}
+  var data = new Buffer(len);
+  data.fill('x');
+  fs.writeFileSync(filename, data);
+  data = null;
+
+  var reads = 0;
+  bench.start();
+  setTimeout(function() {
+    bench.end(reads);
+    try { fs.unlinkSync(filename); } catch (e) {}
+  }, +conf.dur * 1000);
+
+  function read() {
+    fs.readFile(filename, afterRead);
+  }
+
+  function afterRead(er, data) {
+    if (er)
+      throw er;
+
+    if (data.length !== len)
+      throw new Error('wrong number of bytes returned');
+
+    reads++;
+    read();
+  }
+
+  var cur = +conf.concurrent;
+  while (cur--) read();
+}