profiler. refactoring.

lib/bcoin/abstractblock.js

@@ -47,38 +47,6 @@ function AbstractBlock(data) {
   this.lowVersion = this.version & 7;
 }
 
-AbstractBlock.prototype.getMerkleBranch = function getMerkleBranch(index) {
-  var tree = utils.buildMerkleTree(this.merkleRoot);
-  var branch = [];
-  var j = 0;
-  for (var size = this.totalTX; size > 1; size = (size + 1) / 2 | 0) {
-    var i = Math.min(index ^ 1, size - 1);
-    branch.push(tree[j + i]);
-    index >>= 1;
-    j += size;
-  }
-  return branch;
-};
-
-AbstractBlock.prototype.hasMerkleItem = function hasMerkleItem(hash, branch, index) {
-  if (index === -1)
-    return false;
-
-  if (typeof hash === 'string')
-    hash = new Buffer(hash, 'hex');
-
-  for (var i = 0; i < branch.length; i++) {
-    var otherside = branch[i];
-    if (index & 1)
-      hash = utils.dsha256(Buffer.concat([otherside, hash]));
-    else
-      hash = utils.dsha256(Buffer.concat([hash, otherside]));
-    index >>= 1;
-  }
-
-  return utils.toHex(hash) === this.merkleRoot;
-};
-
 AbstractBlock.prototype.hash = function hash(enc) {
   if (!this._hash)
     this._hash = utils.dsha256(this.abbr());

lib/bcoin/chain.js

@@ -1172,9 +1172,14 @@ Chain.prototype.add = function add(initial, peer, callback, force) {
     // validated, and emitted. Hopefully the deserialized
     // blocks get cleaned up by the GC quickly.
     if (block.type === 'compactblock') {
-      block = block.toBlock(peer);
+      try {
-      if (!block)
+        block = block.toBlock();
-        return done(new Error('Failed to parse block.'));
+      } catch (e) {
+        // Ugly hack to handle
+        // the error properly.
+        peer.parser.emit('error', e);
+        return done(e);
+      }
     }
 
     // Do "contextual" verification on our block
@@ -1326,6 +1331,10 @@ Chain.prototype.add = function add(initial, peer, callback, force) {
     // Keep track of total blocks handled.
     self.total += total;
 
+    // Take heap snapshot for debugging.
+    if (self.total % 10 === 0)
+      bcoin.profiler.snapshot();
+
     // We intentionally did not asyncify the
     // callback so if it calls chain.add, it
     // still gets added to the queue. The

lib/bcoin/compactblock.js

@@ -38,17 +38,7 @@ CompactBlock.prototype.getCoinbaseHeight = function getCoinbaseHeight() {
 };
 
 CompactBlock.prototype.toBlock = function toBlock(peer) {
-  var block;
+  return new bcoin.block(bcoin.protocol.parser.parseBlock(this._raw));
-
-  // XXX Hack
-  try {
-    block = bcoin.protocol.parser.parseBlock(this._raw);
-  } catch (e) {
-    peer.parser.emit('error', e);
-    return;
-  }
-
-  return new bcoin.block(block);
 };
 
 /**

lib/bcoin/profiler.js

@@ -13,38 +13,43 @@ var profiler;
 if (bcoin.profile && !bcoin.isBrowser)
   profiler = require('v8-' + 'profiler');
 
+if (profiler) {
+  utils.nextTick(function() {
+    utils.debug('Starting node with profiler enabled.');
+  });
+}
+
 /**
  * Profile
  */
 
 function Profile(name) {
   if (profiler) {
-    if (!name)
+    name = 'profile-' + (name ? name + '-' : '') + Profile.uid++;
-      name = '';
-    name += '-' + Profile.uid++;
     this.profile = profiler.startProfiling(name, true);
     this.name = name;
+    utils.debug('Starting CPU profile: %s', this.name);
   }
 }
 
 Profile.uid = 0;
 
-Profile.prototype.stopProfiling = function stopProfiling(callback) {
+Profile.prototype.stopProfiling = function stopProfiling() {
   if (!profiler)
     return;
 
   assert(this.profile);
 
-  this.profile.stopProfiling();
+  return this.profile.stopProfiling();
 };
 
-Profile.prototype.del = function del(callback) {
+Profile.prototype.del = function del() {
   if (!profiler)
     return;
 
   assert(this.profile);
 
-  this.profile['delete']();
+  return this.profile['delete']();
 };
 
 Profile.prototype.save = function save(callback) {
@@ -57,22 +62,20 @@ Profile.prototype.save = function save(callback) {
 
   assert(this.profile);
 
-  this.profile['export'](function(err, result) {
+  utils.debug('Saving CPU profile: %s', this.name);
+
+  return this.profile['export'](function(err, result) {
     var file;
 
-    if (err) {
+    self.profile['delete']();
-      self.profile['delete']();
+    delete self.profile;
-      delete self.profile;
+
+    if (err)
       return callback(err);
-    }
 
-    file = bcoin.prefix + '/profile-' + self.name + '.json';
+    file = bcoin.prefix + '/' + self.name + '.cpuprofile';
 
-    fs.writeFile(file, result, function(err) {
+    fs.writeFile(file, result, callback);
-      self.profile['delete']();
-      delete self.profile;
-      callback(err);
-    });
   });
 };
 
@@ -82,11 +85,10 @@ Profile.prototype.save = function save(callback) {
 
 function Snapshot(name) {
   if (profiler) {
-    if (!name)
+    name = 'snapshot-' + (name ? name + '-' : '') + Snapshot.uid++;
-      name = '';
-    name += '-' + Snapshot.uid++;
     this.snapshot = profiler.takeSnapshot(name);
     this.name = name;
+    utils.debug('Taking heap snapshot: %s', this.name);
   }
 }
 
@@ -129,22 +131,20 @@ Snapshot.prototype.save = function save(callback) {
 
   assert(this.snapshot);
 
-  this.snapshot['export'](function(err, result) {
+  utils.debug('Saving heap snapshot: %s', this.name);
+
+  return this.snapshot['export'](function(err, result) {
     var file;
 
-    if (err) {
+    self.snapshot['delete']();
-      self.profile['delete']();
+    delete self.snapshot;
-      delete self.profile;
+
+    if (err)
       return callback(err);
-    }
 
-    file = bcoin.prefix + '/snapshot-' + self.name + '.json';
+    file = bcoin.prefix + '/' + self.name + '.heapsnapshot';
 
-    fs.writeFile(file, result, function(err) {
+    fs.writeFile(file, result, callback);
-      self.snapshot['delete']();
-      delete self.snapshot;
-      callback(err);
-    });
   });
 };
 
@@ -168,6 +168,9 @@ exports.snapshot = function snapshot(name, callback) {
     name = null;
   }
 
+  if (!profiler)
+    return callback ? utils.nextTick(callback) : null;
+
   snapshot = new Snapshot(name);
   snapshot.save(callback);
 };

lib/bcoin/utils.js

@@ -1628,7 +1628,42 @@ utils.getMerkleRoot = function getMerkleRoot(items) {
   return tree[tree.length - 1];
 };
 
-// Hook into bn here to ensure we get a toBuffer() method.
+utils.getMerkleBranch = function getMerkleBranch(index, hashes) {
-bn.prototype.toBuffer = function toBuffer(order, size) {
+  var tree = utils.buildMerkleTree(hashes);
-  return new Buffer(this.toArray(order, size));
+  var branch = [];
+  var size = this.totalTX;
+  var j = 0;
+  var i;
+
+  for (; size > 1; size = (size + 1) / 2 | 0) {
+    i = Math.min(index ^ 1, size - 1);
+    branch.push(tree[j + i]);
+    index >>= 1;
+    j += size;
+  }
+
+  return branch;
+};
+
+utils.checkMerkleBranch = function checkMerkleBranch(hash, branch, index) {
+  var otherside, i;
+
+  if (index === -1)
+    return false;
+
+  if (typeof hash === 'string')
+    hash = new Buffer(hash, 'hex');
+
+  for (i = 0; i < branch.length; i++) {
+    otherside = branch[i];
+
+    if (index & 1)
+      hash = utils.dsha256(Buffer.concat([otherside, hash]));
+    else
+      hash = utils.dsha256(Buffer.concat([hash, otherside]));
+
+    index >>= 1;
+  }
+
+  return hash;
 };