Limits only 16 new QUIC connections can be opened per epoll event.

net/tools/quic/end_to_end_test.cc

Index: net/tools/quic/end_to_end_test.cc
diff --git a/net/tools/quic/end_to_end_test.cc b/net/tools/quic/end_to_end_test.cc
index 3b2aa75b4089db000a031efd44081c8c5c06841b..e5be97f5364cb44ad44560fd75bdb0c919ae1dcc 100644
--- a/net/tools/quic/end_to_end_test.cc
+++ b/net/tools/quic/end_to_end_test.cc
@@ -498,6 +498,9 @@ class EndToEndTest : public ::testing::TestWithParam<TestParams> {
     FLAGS_quic_buffer_packet_till_chlo = GetParam().buffer_packet_till_chlo;
     FLAGS_quic_use_cheap_stateless_rejects =
         GetParam().use_cheap_stateless_reject;
+    if (!FLAGS_quic_buffer_packet_till_chlo) {
+      FLAGS_quic_limit_num_new_sessions_per_epoll_loop = false;
+    }
     auto test_server =
         new QuicTestServer(CryptoTestUtils::ProofSourceForTesting(),
                            server_config_, server_supported_versions_);