From d41f293b400c1d2186d4b6bda3098cab4b1e5a0c Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Tue, 6 Sep 2016 01:57:53 -0700
Subject: [PATCH] db: optimize each().

---
 lib/db/lowlevelup.js | 40 ++++++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/lib/db/lowlevelup.js b/lib/db/lowlevelup.js
index cc71e3d4..afebb8bb 100644
--- a/lib/db/lowlevelup.js
+++ b/lib/db/lowlevelup.js
@@ -286,7 +286,7 @@ LowlevelUp.prototype.each = function each(options, handler, callback) {
 
   iter = this.iterator(opt);
 
-  (function next(err, key) {
+  function next(err, key) {
     if (err && typeof err !== 'boolean') {
       return iter.end(function() {
         callback(err);
@@ -306,25 +306,29 @@ LowlevelUp.prototype.each = function each(options, handler, callback) {
       }
     }
 
-    iter.next(function(err, key, value) {
-      if (err) {
-        return iter.end(function() {
-          callback(err);
-        });
-      }
+    iter.next(onNext);
+  }
 
-      if (key === undefined && value === undefined)
-        return iter.end(callback);
+  function onNext(err, key, value) {
+    if (err) {
+      return iter.end(function() {
+        callback(err);
+      });
+    }
 
-      try {
-        handler(key, value, next, i++);
-      } catch (e) {
-        return iter.end(function() {
-          callback(e);
-        });
-      }
-    });
-  })();
+    if (key === undefined && value === undefined)
+      return iter.end(callback);
+
+    try {
+      handler(key, value, next, i++);
+    } catch (e) {
+      return iter.end(function() {
+        callback(e);
+      });
+    }
+  }
+
+  next();
 };
 
 /**