diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index d19a6301..bf3c76e9 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -1640,48 +1640,51 @@ Chain.prototype.purgeOrphans = function purgeOrphans() {
  */
 
 Chain.prototype.pruneOrphans = function pruneOrphans() {
-  var self = this;
-  var best, last;
+  var i, hashes, orphan, height, best, last;
 
-  best = Object.keys(this.orphan.map).reduce(function(best, prevBlock) {
-    var orphan = self.orphan.map[prevBlock];
-    var height = orphan.getCoinbaseHeight();
+  hashes = Object.keys(this.orphan.map);
 
-    last = orphan;
+  if (hashes.length === 0)
+    return;
+
+  for (i = 0; i < hashes.length; i++) {
+    hash = hashes[i];
+    orphan = this.orphan.map[hash];
+    height = orphan.getCoinbaseHeight();
+
+    delete this.orphan.map[hash];
 
     if (!best || height > best.getCoinbaseHeight())
-      return orphan;
+      best = orphan;
 
-    return best;
-  }, null);
+    last = orphan;
+  }
 
   // Save the best for last... or the
-  // last for the best in this case.
-  if (!best || best.getCoinbaseHeight() <= 0)
+  // last for best in this case.
+  if (best.getCoinbaseHeight() <= 0)
     best = last;
 
-  this.emit('purge',
-    this.orphan.count - (best ? 1 : 0),
-    this.orphan.size - (best ? best.getSize() : 0));
+  hashes = Object.keys(this.orphan.bmap);
+
+  for (i = 0; i < hashes.length; i++) {
+    hash = hashes[i];
+    orphan = this.orphan.bmap[hash];
+
+    delete this.orphan.bmap[hash];
 
-  Object.keys(this.orphan.bmap).forEach(function(hash) {
-    var orphan = self.orphan.bmap[hash];
     if (orphan !== best)
-      self.emit('unresolved', orphan);
-  });
+      this.emit('unresolved', orphan);
+  }
 
-  this.orphan.map = {};
-  this.orphan.bmap = {};
-  this.orphan.count = 0;
-  this.orphan.size = 0;
-
-  if (!best)
-    return;
+  this.emit('purge',
+    this.orphan.count - 1,
+    this.orphan.size - best.getSize());
 
   this.orphan.map[best.prevBlock] = best;
   this.orphan.bmap[best.hash('hex')] = best;
-  this.orphan.count++;
-  this.orphan.size += best.getSize();
+  this.orphan.count = 1;
+  this.orphan.size = best.getSize();
 };
 
 /**