diff --git a/benchmark/io.js b/benchmark/io.js
deleted file mode 100644
index 1c18e05f615..00000000000
--- a/benchmark/io.js
+++ /dev/null
@@ -1,109 +0,0 @@
-var fs = require('fs');
-var util = require('util');
-var Buffer = require('buffer').Buffer;
-
-var path = "/tmp/wt.dat";
-var tsize = 1000 * 1048576;
-var bsizes = [1024, 4096, 8192, 16384, 32768, 65536];
-
-function bufit(size) {
-  var buf = new Buffer(size);
-  for (var i = 0; i <buf.length ; i += 1) {
-    buf[i] = 33;
-  }
-  return buf;
-}
-
-function once(emitter, name, cb) {
-  function incb() {
-    cb.apply(undefined, arguments);
-    emitter.removeListener(name, incb);
-  }
-  emitter.addListener(name, incb);
-}
-
-c = 0
-
-function writetest(size, bsize) {
-  var s = fs.createWriteStream(path, {'flags': 'w', 'mode': 0644});
-  var remaining = size;
-  var buf = bufit(bsize);
-
-  function dowrite() {
-    var rv = s.write(buf);
-    remaining -= buf.length;
-    if (remaining > 0) {
-      //if (remaining % 90000 == 0) console.error("remaining: %d", remaining);
-      //process.nextTick(dowrite);
-    } else {
-      s.emit('done')
-      s.end();
-    }
-  }
-
-  s.on('drain', function () {
-    dowrite();
-    if (c++ % 2000 == 0) util.print(".");
-  });
-
-  dowrite();
-
-  return s;
-}
-
-function readtest(size, bsize) {
-  var s = fs.createReadStream(path, {'flags': 'r', 'encoding': 'binary', 'mode': 0644, 'bufferSize': bsize});
-  s.addListener("data", function (chunk) {
-    // got a chunk...
-    
-  });
-  return s;
-}
-
-function wt(tsize, bsize, done) {
-  var start = Date.now();
-  s = writetest(tsize, bsize);
-  s.addListener('close', function() {
-    var end = Date.now();
-    var diff = end - start;
-    console.log('Wrote '+ tsize +' bytes in '+  diff/1000 +'s using '+ bsize +' byte buffers: '+  ((tsize/(diff/1000)) / 1048576) +' mB/s');
-    done();
-  });
-}
-
-function rt(tsize, bsize, done) {
-  var start = Date.now();
-  s = readtest(tsize, bsize);
-  s.addListener('close', function() {
-    var end = Date.now();
-    var diff = end - start;
-    console.log('Read '+ tsize +' bytes in '+  diff/1000 +'s using '+ bsize +' byte buffers: '+  ((tsize/(diff/1000)) / 1048576) +' mB/s');
-    done();
-  });
-}
-
-var bs= 0;
-
-function nextwt() {
-  if (bsizes.length <= bs) {
-    bs = 0;
-    nextrt();
-    return;
-  }
-  wt(tsize, bsizes[bs], nextwt);
-  bs += 1;
-}
-
-function nextrt() {
-  if (bsizes.length <= bs) {
-    fs.unlink(path, function (err) {
-      if (err) throw err;
-      console.log('All done!');
-    });
-    return;
-  }
-  rt(tsize, bsizes[bs], nextrt);
-  bs += 1;
-}
-
-nextwt();