From effaa57abfde63f0e00d790380f4c8f513bca74d Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 15 Feb 2016 11:00:15 -0800
Subject: [PATCH] blockdb drop queue and cache.

---
 lib/bcoin/blockdb.js | 50 +++-----------------------------------------
 1 file changed, 3 insertions(+), 47 deletions(-)

diff --git a/lib/bcoin/blockdb.js b/lib/bcoin/blockdb.js
index 436b6f01..79d93917 100644
--- a/lib/bcoin/blockdb.js
+++ b/lib/bcoin/blockdb.js
@@ -674,8 +674,6 @@ function BlockData(options) {
   if (!this.file)
     this.file = process.env.HOME + '/bcoin-block-' + network.type + '.db';
 
-  this._queue = [];
-  this._cache = {};
   this._bufferPool = { used: {} };
   this.size = 0;
   this.fd = null;
@@ -707,7 +705,9 @@ BlockData.prototype._init = function _init() {
 };
 
 BlockData.prototype._malloc = function(size) {
-  return new Buffer(size);
+  if (size > 500)
+    return new Buffer(size);
+
   if (!this._bufferPool[size])
     this._bufferPool[size] = new Buffer(size);
 
@@ -720,7 +720,6 @@ BlockData.prototype._malloc = function(size) {
 };
 
 BlockData.prototype._free = function(buf) {
-  return;
   if (this._bufferPool.used[buf.length] === buf) {
     assert(this._bufferPool[buf.length] === buf);
     delete this._bufferPool.used[buf.length];
@@ -751,36 +750,20 @@ BlockData.prototype.getSize = function getSize() {
 };
 
 BlockData.prototype.getSync = function getSync(size, offset) {
-  var hash = size + '/' + offset;
-
-  if (this._cache[hash])
-    return this._cache[hash];
-
-  if (this._queue[hash])
-    return this._queue[hash];
-
   return this._readSync(size, offset);
 };
 
 BlockData.prototype.getAsync = function getAsync(size, offset, callback) {
   var self = this;
-  var hash = size + '/' + offset;
 
   callback = utils.asyncify(callback);
 
-  if (this._cache[hash])
-    return callback(null, this._cache[hash]);
-
-  if (this._queue[hash])
-    return callback(null, this._queue[hash]);
-
   return this._readAsync(size, offset, callback);
 };
 
 BlockData.prototype.saveSync = function saveSync(data) {
   var self = this;
   var offset = this.size;
-  var hash = data + '/' + offset;
 
   this._writeSync(data, offset);
 
@@ -790,39 +773,12 @@ BlockData.prototype.saveSync = function saveSync(data) {
 BlockData.prototype.saveAsync = function saveAsync(data, callback) {
   var self = this;
   var offset = this.size;
-  var hash = data + '/' + offset;
 
   callback = utils.asyncify(callback);
 
-  // Something is already writing. Cancel it
-  // and synchronously write the data after
-  // it cancels.
-  if (this._queue[hash]) {
-    this._queue[hash] = data;
-    return callback(null, { size: data.length, offset: offset });
-  }
-
-  // Speed up writes by doing them asynchronously
-  // and keeping the data to be written in memory.
-  this._queue[hash] = data;
-
   return this._writeAsync(data, offset, function(err, success) {
     if (err)
       return callback(err);
-
-    var item = self._queue[hash];
-
-    // Something tried to write here but couldn't.
-    // Synchronously write it and get it over with.
-    try {
-      if (item && item !== data)
-        success = self._writeSync(item, offset);
-    } catch (e) {
-      err = e;
-    }
-
-    delete self._queue[hash];
-
     return callback(null, { size: data.length, offset: offset });
   });
 };