From 0d573083b9695f98ca592d12b17e17b79cb9a2c4 Mon Sep 17 00:00:00 2001
From: Yuchen Zeng <zyc@google.com>
Date: Wed, 1 Nov 2017 11:34:15 -0700
Subject: [PATCH] Add comments for setting the env variable

---
 test/cpp/end2end/async_end2end_test.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index ddb0ba9b667..cf1cc7e486d 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -2012,6 +2012,8 @@ INSTANTIATE_TEST_CASE_P(AsyncEnd2endServerTryCancel,
 }  // namespace grpc
 
 int main(int argc, char** argv) {
+  // Change the backup poll interval from 5s to 200ms to speed up the
+  // ReconnectChannel test
   gpr_setenv("GRPC_CLIENT_CHANNEL_BACKUP_POLL_INTERVAL_MS", "200");
   grpc_test_init(argc, argv);
   gpr_tls_init(&g_is_async_end2end_test);