--- old/src/hotspot/share/gc/g1/g1GCPhaseTimes.cpp	2018-04-23 16:50:33.747219984 +0200
+++ new/src/hotspot/share/gc/g1/g1GCPhaseTimes.cpp	2018-04-23 16:50:33.450210726 +0200
@@ -129,7 +129,6 @@
   _cur_clear_ct_time_ms = 0.0;
   _cur_expand_heap_time_ms = 0.0;
   _cur_ref_proc_time_ms = 0.0;
-  _cur_ref_enq_time_ms = 0.0;
   _cur_weak_ref_proc_time_ms = 0.0;
   _cur_collection_start_sec = 0.0;
   _root_region_scan_wait_time_ms = 0.0;
@@ -383,7 +382,6 @@
                         _recorded_preserve_cm_referents_time_ms +
                         _cur_ref_proc_time_ms +
                         _cur_weak_ref_proc_time_ms +
-                        _cur_ref_enq_time_ms +
                         _cur_clear_ct_time_ms +
                         _recorded_merge_pss_time_ms +
                         _cur_strong_code_root_purge_time_ms +
@@ -416,9 +414,6 @@
     trace_time("Remove Self Forwards",_cur_evac_fail_remove_self_forwards);
   }
 
-  debug_time_for_reference("Reference Enqueuing", _cur_ref_enq_time_ms);
-  _ref_phase_times.print_enqueue_phase(2, false);
-
   debug_time("Merge Per-Thread State", _recorded_merge_pss_time_ms);
   debug_time("Code Roots Purge", _cur_strong_code_root_purge_time_ms);