gistfile1

diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
index 630a3f3..de7d4e3 100644
--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
@@ -107,7 +107,18 @@ function Readable(options) {
 // write() some more.
 Readable.prototype.push = function(chunk) {
   var rs = this._readableState;
-  rs.onread(null, chunk);
+
+  if (rs.flowing && rs.length === 0 &&
+      chunk !== null && chunk !== undefined &&
+      (rs.objectMode || chunk.length)) {
+    // console.error('R pushPipe optimization');
+    pipeWrite(this, rs, chunk);
+    if (rs.awaitDrain <= 0) {
+      pipeAfterWrite(this, rs);
+    }
+  } else {
+    rs.onread(null, chunk);
+  }
 
   // if it's past the high water mark, we can push in some more.
   // Also, if it's still within the lowWaterMark, we can stand some