benchmark: Backport improvements made in master

Ported to v0.6 for easier comparison in the 0.8.0 blog post.

benchmark/fs-readfile.js

@@ -0,0 +1,72 @@
+// 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 filename = path.resolve(__dirname, 'http.sh');
+var fs = require('fs');
+var count = 0;
+var go = true;
+var len = -1;
+var assert = require('assert');
+
+var concurrency = 1;
+var encoding = null;
+var time = 10;
+
+for (var i = 2; i < process.argv.length; i++) {
+  var arg = process.argv[i];
+  if (arg.match(/^-e$/)) {
+    encoding = process.argv[++i] || null;
+  } else if (arg.match(/^-c$/)) {
+    concurrency = ~~process.argv[++i];
+    if (concurrency < 1) concurrency = 1;
+  } else if (arg === '-t') {
+    time = ~~process.argv[++i];
+    if (time < 1) time = 1;
+  }
+}
+
+
+setTimeout(function() {
+  go = false;
+}, time * 1000);
+
+function round(n) {
+  return Math.floor(n * 100) / 100;
+}
+
+var start = Date.now();
+while (concurrency--) readFile();
+
+function readFile() {
+  if (!go) {
+    process.stdout.write('\n');
+    console.log('read the file %d times (higher is better)', count);
+    var end = Date.now();
+    var elapsed = (end - start) / 1000;
+    var ns = elapsed * 1E9;
+    var nsper = round(ns / count);
+    console.log('%d ns per read (lower is better)', nsper);
+    var readsper = round(count / (ns / 1E9));
+    console.log('%d reads per sec (higher is better)', readsper);
+    process.exit(0);
+    return;
+  }
+
+  if (!(count % 1000)) {
+    process.stdout.write('.');
+  }
+
+  if (encoding) fs.readFile(filename, encoding, then);
+  else fs.readFile(filename, then);
+
+  function then(er, data) {
+    assert.ifError(er);
+    count++;
+    // basic sanity test: we should get the same number of bytes each time.
+    if (count === 1) len = data.length;
+    else assert(len === data.length);
+    readFile();
+  }
+}

benchmark/http.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+cd "$(dirname "$(dirname $0)")"
+sudo sysctl -w net.inet.ip.portrange.first=12000
+sudo sysctl -w net.inet.tcp.msl=1000
+sudo sysctl -w kern.maxfiles=1000000 kern.maxfilesperproc=1000000
+ulimit -n 100000
+
+./node benchmark/http_simple.js || exit 1 &
+sleep 1
+
+ab -n 30000 -c 100 http://127.0.0.1:8000/${TYPE:-bytes}/${LENGTH:-1024} | grep Req
+killall node

benchmark/http_simple.js

@@ -1,75 +1,99 @@
-path = require("path");
-exec = require("child_process").exec;
-http = require("http");
+var path = require('path'),
+    exec = require('child_process').exec,
+    http = require('http');
 
-port = parseInt(process.env.PORT || 8000);
+var port = parseInt(process.env.PORT || 8000);
 
 console.log('pid ' + process.pid);
 
-fixed = ""
-for (var i = 0; i < 20*1024; i++) {
-  fixed += "C";
+var fixed = makeString(20 * 1024, 'C'),
+    storedBytes = {},
+    storedBuffer = {},
+    storedUnicode = {};
+
+var useDomains = process.env.NODE_USE_DOMAINS;
+
+// set up one global domain.
+if (useDomains) {
+  var domain = require('domain');
+  var gdom = domain.create();
+  gdom.on('error', function(er) {
+    console.log('Error on global domain', er);
+    throw er;
+  });
+  gdom.enter();
 }
 
-stored = {};
-storedBuffer = {};
-
 var server = http.createServer(function (req, res) {
-  var commands = req.url.split("/");
+  if (useDomains) {
+    var dom = domain.create();
+    dom.add(req);
+    dom.add(res);
+  }
+
+  var commands = req.url.split('/');
   var command = commands[1];
-  var body = "";
+  var body = '';
   var arg = commands[2];
   var n_chunks = parseInt(commands[3], 10);
   var status = 200;
 
-  if (command == "bytes") {
-    var n = parseInt(arg, 10)
+  if (command == 'bytes') {
+    var n = ~~arg;
     if (n <= 0)
-      throw "bytes called with n <= 0"
-    if (stored[n] === undefined) {
-      console.log("create stored[n]");
-      stored[n] = "";
-      for (var i = 0; i < n; i++) {
-        stored[n] += "C"
-      }
+      throw new Error('bytes called with n <= 0')
+    if (storedBytes[n] === undefined) {
+      console.log('create storedBytes[n]');
+      storedBytes[n] = makeString(n, 'C');
     }
-    body = stored[n];
+    body = storedBytes[n];
 
-  } else if (command == "buffer") {
-    var n = parseInt(arg, 10)
-    if (n <= 0) throw new Error("bytes called with n <= 0");
+  } else if (command == 'buffer') {
+    var n = ~~arg;
+    if (n <= 0)
+      throw new Error('buffer called with n <= 0');
     if (storedBuffer[n] === undefined) {
-      console.log("create storedBuffer[n]");
+      console.log('create storedBuffer[n]');
       storedBuffer[n] = new Buffer(n);
       for (var i = 0; i < n; i++) {
-        storedBuffer[n][i] = "C".charCodeAt(0);
+        storedBuffer[n][i] = 'C'.charCodeAt(0);
       }
     }
     body = storedBuffer[n];
 
-  } else if (command == "quit") {
-    res.connection.server.close();
-    body = "quitting";
+  } else if (command == 'unicode') {
+    var n = ~~arg;
+    if (n <= 0)
+      throw new Error('unicode called with n <= 0');
+    if (storedUnicode[n] === undefined) {
+      console.log('create storedUnicode[n]');
+      storedUnicode[n] = makeString(n, '\u263A');
+    }
+    body = storedUnicode[n];
 
-  } else if (command == "fixed") {
+  } else if (command == 'quit') {
+    res.connection.server.close();
+    body = 'quitting';
+
+  } else if (command == 'fixed') {
     body = fixed;
 
-  } else if (command == "echo") {
-    res.writeHead(200, { "Content-Type": "text/plain",
-                         "Transfer-Encoding": "chunked" });
+  } else if (command == 'echo') {
+    res.writeHead(200, { 'Content-Type': 'text/plain',
+                         'Transfer-Encoding': 'chunked' });
     req.pipe(res);
     return;
 
   } else {
     status = 404;
-    body = "not found\n";
+    body = 'not found\n';
   }
 
   // example: http://localhost:port/bytes/512/4
   // sends a 512 byte body in 4 chunks of 128 bytes
   if (n_chunks > 0) {
-    res.writeHead(status, { "Content-Type": "text/plain",
-                            "Transfer-Encoding": "chunked" });
+    res.writeHead(status, { 'Content-Type': 'text/plain',
+                            'Transfer-Encoding': 'chunked' });
     // send body in chunks
     var len = body.length;
     var step = ~~(len / n_chunks) || len;
@@ -82,13 +106,20 @@ var server = http.createServer(function (req, res) {
   } else {
     var content_length = body.length.toString();
 
-    res.writeHead(status, { "Content-Type": "text/plain",
-                            "Content-Length": content_length });
+    res.writeHead(status, { 'Content-Type': 'text/plain',
+                            'Content-Length': content_length });
     res.end(body);
   }
-
 });
 
+function makeString(size, c) {
+  var s = '';
+  while (s.length < size) {
+    s += c;
+  }
+  return s;
+}
+
 server.listen(port, function () {
   console.log('Listening at http://127.0.0.1:'+port+'/');
 });

benchmark/io.js

@@ -62,7 +62,7 @@ function readtest(size, bsize) {
 
 function wt(tsize, bsize, done) {
   var start = Date.now();
-  s = writetest(tsize, bsizes[0]);
+  s = writetest(tsize, bsize);
   s.addListener('close', function() {
     var end = Date.now();
     var diff = end - start;
@@ -73,7 +73,7 @@ function wt(tsize, bsize, done) {
 
 function rt(tsize, bsize, done) {
   var start = Date.now();
-  s = readtest(tsize, bsizes[0]);
+  s = readtest(tsize, bsize);
   s.addListener('close', function() {
     var end = Date.now();
     var diff = end - start;