Optimize clearing of map transitions.

src/heap/gc-tracer.cc

 // Copyright 2014 the V8 project 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 "src/heap/gc-tracer.h"
 
 #include "src/counters.h"
 #include "src/heap/heap-inl.h"
 #include "src/isolate.h"
 
@@ skipping 523 matching lines @@
                    "new_new=%.1f "
                    "root_new=%.1f "
                    "old_new=%.1f "
                    "compaction_ptrs=%.1f "
                    "intracompaction_ptrs=%.1f "
                    "misc_compaction=%.1f "
                    "inc_weak_closure=%.1f "
                    "weakcollection_process=%.1f "
                    "weakcollection_clear=%.1f "
                    "weakcollection_abort=%.1f "
-                   "weakcells=%.1f "
-                   "nonlive_refs=%.1f "
-                   "extract_dependent_code=%.1f "
-                   "deopt_dependent_code=%.1f "
+                   "clear=%1f"
+                   "clear_weakcell=%.1f "
+                   "clear_map=%.1f "
+                   "clear_dependent_code=%.1f "
                    "steps_count=%d "
                    "steps_took=%.1f "
                    "longest_step=%.1f "
                    "finalization_steps_count=%d "
                    "finalization_steps_took=%.1f "
                    "finalization_longest_step=%.1f "
                    "incremental_marking_throughput=%" V8_PTR_PREFIX
                    "d "
                    "total_size_before=%" V8_PTR_PREFIX
                    "d "
@@ skipping 48 matching lines @@
                    current_.scopes[Scope::MC_UPDATE_NEW_TO_NEW_POINTERS],
                    current_.scopes[Scope::MC_UPDATE_ROOT_TO_NEW_POINTERS],
                    current_.scopes[Scope::MC_UPDATE_OLD_TO_NEW_POINTERS],
                    current_.scopes[Scope::MC_UPDATE_POINTERS_TO_EVACUATED],
                    current_.scopes[Scope::MC_UPDATE_POINTERS_BETWEEN_EVACUATED],
                    current_.scopes[Scope::MC_UPDATE_MISC_POINTERS],
                    current_.scopes[Scope::MC_INCREMENTAL_FINALIZE],
                    current_.scopes[Scope::MC_WEAKCOLLECTION_PROCESS],
                    current_.scopes[Scope::MC_WEAKCOLLECTION_CLEAR],
                    current_.scopes[Scope::MC_WEAKCOLLECTION_ABORT],
-                   current_.scopes[Scope::MC_WEAKCELL],
-                   current_.scopes[Scope::MC_NONLIVEREFERENCES],
-                   current_.scopes[Scope::MC_EXTRACT_DEPENDENT_CODE],
-                   current_.scopes[Scope::MC_DEOPT_DEPENDENT_CODE],
+                   current_.scopes[Scope::MC_CLEAR],
+                   current_.scopes[Scope::MC_CLEAR_WEAKCELL],
+                   current_.scopes[Scope::MC_CLEAR_MAP],
+                   current_.scopes[Scope::MC_CLEAR_DEPENDENT_CODE],
                    current_.incremental_marking_steps,
                    current_.incremental_marking_duration,
                    current_.longest_incremental_marking_step,
                    cumulative_incremental_marking_finalization_steps_,
                    cumulative_incremental_marking_finalization_duration_,
                    longest_incremental_marking_finalization_step_,
                    IncrementalMarkingSpeedInBytesPerMillisecond(),
                    current_.start_object_size, current_.end_object_size,
                    current_.start_holes_size, current_.end_holes_size,
                    allocated_since_last_gc, heap_->promoted_objects_size(),
@@ skipping 287 matching lines @@
 
 
 bool GCTracer::SurvivalEventsRecorded() const {
   return survival_events_.size() > 0;
 }
 
 
 void GCTracer::ResetSurvivalEvents() { survival_events_.reset(); }
 }  // namespace internal
 }  // namespace v8