Initial work on the server

2026-09-11 11:50:25 +08:00 · 2013-03-25 06:08:51 +05:30
parent 93400554fd
commit 0485272d93
626 changed files with 121311 additions and 1 deletions
@@ -0,0 +1,112 @@
+var lib          = __dirname + '/../lib';
+var Protocol     = require(lib + '/protocol/protocol');
+var Packets      = require(lib + '/protocol/packets');
+var PacketWriter = require(lib + '/protocol/PacketWriter');
+var Parser       = require(lib + '/protocol/Parser');
+
+var options = {
+  rows       : 100000,
+  bufferSize : 64 * 1024,
+};
+
+console.error('Config:', options);
+
+function createBuffers() {
+  var parser = new Parser();
+
+  process.stderr.write('Creating row buffers ... ');
+
+  var number = 1;
+  var id     = 0;
+  var start  = Date.now();
+
+  var buffers = [
+    createPacketBuffer(parser, new Packets.ResultSetHeaderPacket({fieldCount: 2})),
+    createPacketBuffer(parser, new Packets.FieldPacket({catalog: 'foo', name: 'id'})),
+    createPacketBuffer(parser, new Packets.FieldPacket({catalog: 'foo', name: 'text'})),
+    createPacketBuffer(parser, new Packets.EofPacket()),
+  ];
+
+  for (var i = 0; i < options.rows; i++) {
+    buffers.push(createRowDataPacketBuffer(parser, number++));
+  }
+
+  buffers.push(createPacketBuffer(parser, new Packets.EofPacket));
+
+  buffers = mergeBuffers(buffers);
+
+  var bytes = buffers.reduce(function(bytes, buffer) {
+    return bytes + buffer.length;
+  }, 0);
+
+  var mb = (bytes / 1024 / 1024).toFixed(2)
+
+  console.error('%s buffers (%s mb) in %s ms', buffers.length, mb, (Date.now() - start));
+
+  return buffers;
+}
+
+function createPacketBuffer(parser, packet) {
+  var writer = new PacketWriter();
+  packet.write(writer);
+  return writer.toBuffer(parser);
+}
+
+function createRowDataPacketBuffer(parser, number) {
+  var writer = new PacketWriter();
+
+  writer.writeLengthCodedString(parser._nextPacketNumber);
+  writer.writeLengthCodedString('Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry\'s standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has sur');
+
+  return writer.toBuffer(parser);
+}
+
+function mergeBuffers(buffers) {
+  var mergeBuffer  = new Buffer(options.bufferSize);
+  var mergeBuffers = [];
+  var offset       = 0;
+
+  for (var i = 0; i < buffers.length; i++) {
+    var buffer = buffers[i];
+
+    var bytesRemaining = mergeBuffer.length - offset;
+    if (buffer.length < bytesRemaining) {
+      buffer.copy(mergeBuffer, offset);
+      offset += buffer.length;
+    } else {
+      buffer.copy(mergeBuffer, offset, 0, bytesRemaining);
+      mergeBuffers.push(mergeBuffer);
+
+      mergeBuffer = new Buffer(options.bufferSize);
+      buffer.copy(mergeBuffer, 0, bytesRemaining);
+      offset = buffer.length - bytesRemaining;
+    }
+  }
+
+  if (offset > 0) {
+    mergeBuffers.push(mergeBuffer.slice(0, offset));
+  }
+
+  return mergeBuffers;
+}
+
+function benchmark(buffers) {
+  var protocol = new Protocol();
+  protocol._handshakeInitializationPacket = true;
+  protocol.query({typeCast: false, sql: 'SELECT ...'});
+
+  var start = +new Date;
+
+  for (var i = 0; i < buffers.length; i++) {
+    protocol.write(buffers[i]);
+  }
+
+  var duration = Date.now() - start;
+  var hz = Math.round(options.rows / (duration / 1000));
+  console.log(hz);
+}
+
+var buffers = createBuffers();
+while (true) {
+  benchmark(buffers);
+}