diff --git a/NEWS.carto.md b/NEWS.carto.md
index 095fb9f..d5fae03 100644
--- a/NEWS.carto.md
+++ b/NEWS.carto.md
@@ -1,5 +1,11 @@
 # CARTO's Changelog
 
+## v1.2.0-carto.1
+Released 2018-mm-dd
+
+Bug fixes:
+ * Improves performance of COPY TO by sending bigger chunks through low level `push()`. See https://github.com/CartoDB/node-pg-copy-streams/pull/1
+
 ## v1.2.0
 Released 2016-08-22
 
diff --git a/copy-to.js b/copy-to.js
index a45ee6e..ad66b45 100644
--- a/copy-to.js
+++ b/copy-to.js
@@ -42,6 +42,16 @@ CopyStreamQuery.prototype._transform = function(chunk, enc, cb) {
   var messageCode;
   var needPush = false;
 
+  var buffer = Buffer.alloc(chunk.length);
+  var buffer_offset = 0;
+
+  this.pushBufferIfneeded = function() {
+    if (needPush && buffer_offset > 0) {
+      this.push(buffer.slice(0, buffer_offset))
+      buffer_offset = 0;
+    }
+  }
+
   while((chunk.length - offset) >= (Byte1Len + Int32Len)) {
     var messageCode = chunk[offset]
 
@@ -70,6 +80,7 @@ CopyStreamQuery.prototype._transform = function(chunk, enc, cb) {
   
       case code.ErrorResponse:
       case code.CopyDone:
+        this.pushBufferIfneeded();
         this._detach()
         this.push(null)
         return cb();
@@ -84,7 +95,8 @@ CopyStreamQuery.prototype._transform = function(chunk, enc, cb) {
       if (needPush) {
         var row = chunk.slice(offset, offset + length - Int32Len)
         this.rowCount++
-        this.push(row)
+        row.copy(buffer, buffer_offset);
+        buffer_offset += row.length;
       }
       offset += (length - Int32Len)
     } else {
@@ -93,6 +105,8 @@ CopyStreamQuery.prototype._transform = function(chunk, enc, cb) {
     }
   }
 
+  this.pushBufferIfneeded();
+
   if(chunk.length - offset) {
     var slice = chunk.slice(offset)
     this._remainder = slice