diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index f34b74f7..0d3cd6d9 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -65,10 +65,9 @@ function ChainDB(chain, options) {
   else
     this._cacheWindow = network.block.majorityWindow + 1;
 
-  // this.cacheHash = new bcoin.lru(this._cacheWindow);
-  // this.cacheHeight = new bcoin.lru(this._cacheWindow);
-  this.cacheHash = new DumbCache(this._cacheWindow * 10);
-  this.cacheHeight = new DumbCache(this._cacheWindow * 10);
+  this.coinCache = new NullCache(100000);
+  this.cacheHash = new bcoin.lru(this._cacheWindow);
+  this.cacheHeight = new bcoin.lru(this._cacheWindow);
 
   this._init();
 }
@@ -777,7 +776,7 @@ ChainDB.prototype.removeBlock = function removeBlock(hash, batch, callback) {
 
 ChainDB.prototype.connectBlock = function connectBlock(block, batch, callback) {
   var self = this;
-  var i, j, tx, input, output, key, address, hash, uniq;
+  var i, j, tx, input, output, key, address, hash, uniq, coin;
 
   if (this.options.spv) {
     self.emit('add block', block);
@@ -818,11 +817,13 @@ ChainDB.prototype.connectBlock = function connectBlock(block, batch, callback) {
         }
 
         batch.del('u/t/' + key);
+        self.coinCache.remove(key);
       }
 
       for (j = 0; j < tx.outputs.length; j++) {
         output = tx.outputs[j];
         key = hash + '/' + j;
+        coin = bcoin.coin(tx, j);
 
         if (self.options.indexAddress) {
           address = output.getAddress();
@@ -836,7 +837,8 @@ ChainDB.prototype.connectBlock = function connectBlock(block, batch, callback) {
             batch.put('u/a/' + address + '/' + key, DUMMY);
         }
 
-        batch.put('u/t/' + key, bcoin.coin(tx, j).toRaw());
+        batch.put('u/t/' + key, coin.toRaw());
+        self.coinCache.set(key, coin);
       }
     }
 
@@ -898,6 +900,7 @@ ChainDB.prototype.disconnectBlock = function disconnectBlock(block, batch, callb
         }
 
         batch.put('u/t/' + key, input.coin.toRaw());
+        self.coinCache.set(key, input.coin);
       }
 
       for (j = 0; j < tx.outputs.length; j++) {
@@ -917,6 +920,7 @@ ChainDB.prototype.disconnectBlock = function disconnectBlock(block, batch, callb
         }
 
         batch.del('u/t/' + key);
+        self.coinCache.remove(key);
       }
     }
 
@@ -1113,10 +1117,15 @@ ChainDB.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, call
  */
 
 ChainDB.prototype.getCoin = function getCoin(hash, index, callback) {
-  var key = 'u/t/' + hash + '/' + index;
+  var self = this;
+  var key = hash + '/' + index;
   var coin;
 
-  this.db.get(key, function(err, data) {
+  coin = this.coinCache.get(key);
+  if (coin)
+    return utils.asyncify(callback)(null, coin);
+
+  this.db.get('u/t/' + key, function(err, data) {
     if (err && err.type !== 'NotFoundError')
       return callback(err);
 
@@ -1131,6 +1140,8 @@ ChainDB.prototype.getCoin = function getCoin(hash, index, callback) {
       return callback(e);
     }
 
+    self.coinCache.set(key, coin);
+
     return callback(null, coin);
   });
 };