diff --git a/lib/ace/document.js b/lib/ace/document.js
index 0214b38b..2e6e5db3 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -312,11 +312,11 @@ var Document = function(text) {
             return {row: row, column: 0};
 
         // Apply doesn't work for big arrays due to max call stack detection.
-        // Chrome 64 bit requires threshold smaller than 32k, using a safe value of 1k.
+        // Chrome 64 bit requires threshold smaller than 32k, using a safe value of 20k.
         // To circumvent that we have to break huge inserts into smaller chunks here.
-        while (lines.length > 1000) {
-            var end = this._insertLines(row, lines.slice(0, 1000));
-            lines = lines.slice(1000);
+        while (lines.length > 20000) {
+            var end = this._insertLines(row, lines.slice(0, 20000));
+            lines = lines.slice(20000);
             row = end.row;
         }
 
diff --git a/lib/ace/document_test.js b/lib/ace/document_test.js
index 5c324db0..051434b4 100644
--- a/lib/ace/document_test.js
+++ b/lib/ace/document_test.js
@@ -296,6 +296,35 @@ module.exports = {
     "test: empty document has to contain one line": function() {
         var doc = new Document("");
         assert.equal(doc.$lines.length, 1);
+    },
+    
+    "test: ignore empty delta": function() {
+        var doc = new Document("");
+        doc.on("change", function() {
+            throw "should ignore empty delta";
+        })
+        doc.insert({row: 0, column: 0}, "");
+        doc.insert({row: 1, column: 1}, "");
+        doc.remove({start: {row: 1, column: 1}, end: {row: 1, column: 1}});
+    },
+    
+    "test: inserting huge delta": function() {
+        var doc = new Document("");
+        var val = "";
+        var MAX = 0xF000;
+        for (var i = 0; i < 10 * MAX; i++) {
+            val += i + "\n"
+        }
+        doc.setValue(val);
+        assert.equal(doc.getValue(), val);
+        
+        for (var i = 3 * MAX + 2; i >= 3 * MAX - 2; i--) {
+            val = doc.getLines(0, i).join("\n");
+            doc.setValue("\nab");
+            assert.equal(doc.getValue(), "\nab");
+            doc.insert({row: 1, column: 1}, val);
+            assert.equal(doc.getValue(), "\na" + val + "b");
+        }
     }
 };