I give up: setImmediate for every callback

lib/mbtiles.js

@@ -615,9 +615,6 @@ MBTiles.prototype.putGeocoderData = function(type, shard, data, callback) {
     });
 };
 
-var stackCounter = 0;
-var stackMax = 3;
-
 // Implements carmen#geocoderDataIterator method.
 MBTiles.prototype.geocoderDataIterator = function(type) {
     var chunkSize = 100;
@@ -628,35 +625,28 @@ MBTiles.prototype.geocoderDataIterator = function(type) {
     var doneSentinel = {};
     var _this = this;
 
-    // every nth callback call (globally) do it via setImmediate
-    // to avoid callback loops that blow the callstack
-    var checkStack = function(cb, arg) {
-        if (stackCounter >= stackMax) {
-            stackCounter = 0;
-            setImmediate(function() {
-                cb(arg);
-            })
-        } else {
-            stackCounter += 1;
-            cb(arg);
-        }
-    }
-
     var sending = false;
     var sendIfAvailable = function() {
         if (sending) return;
         sending = true;
 
         while (nextQueue.length && dataQueue.length) {
-            var nextCb = nextQueue.shift(), data;
+            var nextCb = nextQueue.shift(), data, cbValue;
             if (dataQueue[0] == doneSentinel) {
-                checkStack(nextCb, {value: undefined, done: true});
+                cbValue = {value: undefined, done: true};
             } else {
                 data = dataQueue.shift();
                 maybeRefillBuffer();
 
-                checkStack(nextCb, {value: {shard: data.shard, data: zlib.inflateSync(data.data)}, done: false});
+                cbValue = {value: {shard: data.shard, data: zlib.inflateSync(data.data)}, done: false};
             }
+            // bind the callback and data now so that they don't change before the setImmediate
+            // callback is executed
+            (function(nextCb, cbValue) {
+                setImmediate(function() {
+                    nextCb(cbValue);
+                });
+            })(nextCb, cbValue);
         }
 
         sending = false;