These LOG(INFO)s claimed 8-9% of time under a load test.

net/quic/quic_unacked_packet_map.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/quic_unacked_packet_map.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "net/quic/quic_connection_stats.h"
 #include "net/quic/quic_utils_chromium.h"
@@ skipping 138 matching lines @@
     LOG(DFATAL) << "NackPacket called for packet that is not unacked: "
                 << sequence_number;
     return;
   }
 
   it->second.nack_count = max(min_nacks, it->second.nack_count + 1);
 }
 
 void QuicUnackedPacketMap::RemovePacket(
     QuicPacketSequenceNumber sequence_number) {
-  DVLOG(1) << __FUNCTION__ << " " << sequence_number;
   UnackedPacketMap::iterator it = unacked_packets_.find(sequence_number);
   if (it == unacked_packets_.end()) {
     LOG(DFATAL) << "packet is not unacked: " << sequence_number;
     return;
   }
   const TransmissionInfo& transmission_info = it->second;
   transmission_info.all_transmissions->erase(sequence_number);
   if (transmission_info.all_transmissions->empty()) {
     delete transmission_info.all_transmissions;
   }
   if (transmission_info.retransmittable_frames != NULL) {
     delete transmission_info.retransmittable_frames;
   }
   unacked_packets_.erase(it);
 }
 
 void QuicUnackedPacketMap::NeuterPacket(
     QuicPacketSequenceNumber sequence_number) {
-  DVLOG(1) << __FUNCTION__ << " " << sequence_number << " pending? "
-           << unacked_packets_[sequence_number].pending;
   UnackedPacketMap::iterator it = unacked_packets_.find(sequence_number);
   if (it == unacked_packets_.end()) {
     LOG(DFATAL) << "packet is not unacked: " << sequence_number;
     return;
   }
   TransmissionInfo* transmission_info = &it->second;
   if (transmission_info->all_transmissions->size() > 1) {
     transmission_info->all_transmissions->erase(sequence_number);
     transmission_info->all_transmissions = new SequenceNumberSet();
     transmission_info->all_transmissions->insert(sequence_number);
@@ skipping 143 matching lines @@
   DCHECK(!it->second.pending);
 
   largest_sent_packet_ = max(sequence_number, largest_sent_packet_);
   bytes_in_flight_ += bytes_sent;
   it->second.sent_time = sent_time;
   it->second.bytes_sent = bytes_sent;
   it->second.pending = true;
 }
 
 }  // namespace net