From 7149788e0a03b0c9274966881873893991662b39 Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Mon, 2 Oct 2017 09:26:06 -0700
Subject: [PATCH] Fix performance regression caused by truncating first 5 bytes
 of gRPC PDU

---
 src/core/ext/transport/chttp2/transport/chttp2_transport.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/ext/transport/chttp2/transport/chttp2_transport.c b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
index acf49632ff5..3a4b53d2546 100644
--- a/src/core/ext/transport/chttp2/transport/chttp2_transport.c
+++ b/src/core/ext/transport/chttp2/transport/chttp2_transport.c
@@ -1901,7 +1901,8 @@ void grpc_chttp2_maybe_complete_recv_message(grpc_exec_ctx *exec_ctx,
                                  &s->frame_storage);
           s->unprocessed_incoming_frames_decompressed = false;
         }
-        if (!s->unprocessed_incoming_frames_decompressed) {
+        if (!s->unprocessed_incoming_frames_decompressed &&
+            s->stream_decompression_method != GRPC_STREAM_COMPRESSION_IDENTITY_DECOMPRESS) {
           GPR_ASSERT(s->decompressed_data_buffer.length == 0);
           bool end_of_context;
           if (!s->stream_decompression_ctx) {