diff --git a/runtime/tests/vm/dart/splay_test.dart b/runtime/tests/vm/dart/splay_test.dart
index 0e5ee189cb9..0df396ba5a6 100644
--- a/runtime/tests/vm/dart/splay_test.dart
+++ b/runtime/tests/vm/dart/splay_test.dart
@@ -9,30 +9,30 @@
 // objects, and between marked and unmarked objects.
 
 // VMOptions=
-// VMOptions=--no_concurrent_mark --no_concurrent_sweep
-// VMOptions=--no_concurrent_mark --concurrent_sweep
-// VMOptions=--no_concurrent_mark --use_compactor
-// VMOptions=--no_concurrent_mark --use_compactor --force_evacuation
-// VMOptions=--concurrent_mark --no_concurrent_sweep
-// VMOptions=--concurrent_mark --concurrent_sweep
-// VMOptions=--concurrent_mark --use_compactor
-// VMOptions=--concurrent_mark --use_compactor --force_evacuation
-// VMOptions=--scavenger_tasks=0
-// VMOptions=--scavenger_tasks=1
-// VMOptions=--scavenger_tasks=2
-// VMOptions=--scavenger_tasks=3
-// VMOptions=--verify_before_gc
-// VMOptions=--verify_after_gc
-// VMOptions=--verify_before_gc --verify_after_gc
-// VMOptions=--verify_store_buffer
-// VMOptions=--verify_after_marking
-// VMOptions=--stress_write_barrier_elimination
-// VMOptions=--old_gen_heap_size=100
-// VMOptions=--mark_when_idle
-// VMOptions=--no_load_cse
-// VMOptions=--no_dead_store_elimination
-// VMOptions=--no_load_cse --no_dead_store_elimination
-// VMOptions=--test_il_serialization
+// VMOptions=--profiler --no_concurrent_mark --no_concurrent_sweep
+// VMOptions=--profiler --no_concurrent_mark --concurrent_sweep
+// VMOptions=--profiler --no_concurrent_mark --use_compactor
+// VMOptions=--profiler --no_concurrent_mark --use_compactor --force_evacuation
+// VMOptions=--profiler --concurrent_mark --no_concurrent_sweep
+// VMOptions=--profiler --concurrent_mark --concurrent_sweep
+// VMOptions=--profiler --concurrent_mark --use_compactor
+// VMOptions=--profiler --concurrent_mark --use_compactor --force_evacuation
+// VMOptions=--profiler --scavenger_tasks=0
+// VMOptions=--profiler --scavenger_tasks=1
+// VMOptions=--profiler --scavenger_tasks=2
+// VMOptions=--profiler --scavenger_tasks=3
+// VMOptions=--profiler --verify_before_gc
+// VMOptions=--profiler --verify_after_gc
+// VMOptions=--profiler --verify_before_gc --verify_after_gc
+// VMOptions=--profiler --verify_store_buffer
+// VMOptions=--profiler --verify_after_marking
+// VMOptions=--profiler --stress_write_barrier_elimination
+// VMOptions=--profiler --old_gen_heap_size=100
+// VMOptions=--profiler --mark_when_idle
+// VMOptions=--profiler --no_load_cse
+// VMOptions=--profiler --no_dead_store_elimination
+// VMOptions=--profiler --no_load_cse --no_dead_store_elimination
+// VMOptions=--profiler --test_il_serialization
 
 import "splay_common.dart";
 
diff --git a/runtime/tests/vm/dart_2/splay_test.dart b/runtime/tests/vm/dart_2/splay_test.dart
index 18cfe108023..f3b8da4978e 100644
--- a/runtime/tests/vm/dart_2/splay_test.dart
+++ b/runtime/tests/vm/dart_2/splay_test.dart
@@ -13,30 +13,30 @@
 // @dart=2.9
 
 // VMOptions=
-// VMOptions=--no_concurrent_mark --no_concurrent_sweep
-// VMOptions=--no_concurrent_mark --concurrent_sweep
-// VMOptions=--no_concurrent_mark --use_compactor
-// VMOptions=--no_concurrent_mark --use_compactor --force_evacuation
-// VMOptions=--concurrent_mark --no_concurrent_sweep
-// VMOptions=--concurrent_mark --concurrent_sweep
-// VMOptions=--concurrent_mark --use_compactor
-// VMOptions=--concurrent_mark --use_compactor --force_evacuation
-// VMOptions=--scavenger_tasks=0
-// VMOptions=--scavenger_tasks=1
-// VMOptions=--scavenger_tasks=2
-// VMOptions=--scavenger_tasks=3
-// VMOptions=--verify_before_gc
-// VMOptions=--verify_after_gc
-// VMOptions=--verify_before_gc --verify_after_gc
-// VMOptions=--verify_store_buffer
-// VMOptions=--verify_after_marking
-// VMOptions=--stress_write_barrier_elimination
-// VMOptions=--old_gen_heap_size=100
-// VMOptions=--mark_when_idle
-// VMOptions=--no_load_cse
-// VMOptions=--no_dead_store_elimination
-// VMOptions=--no_load_cse --no_dead_store_elimination
-// VMOptions=--test_il_serialization
+// VMOptions=--profiler --no_concurrent_mark --no_concurrent_sweep
+// VMOptions=--profiler --no_concurrent_mark --concurrent_sweep
+// VMOptions=--profiler --no_concurrent_mark --use_compactor
+// VMOptions=--profiler --no_concurrent_mark --use_compactor --force_evacuation
+// VMOptions=--profiler --concurrent_mark --no_concurrent_sweep
+// VMOptions=--profiler --concurrent_mark --concurrent_sweep
+// VMOptions=--profiler --concurrent_mark --use_compactor
+// VMOptions=--profiler --concurrent_mark --use_compactor --force_evacuation
+// VMOptions=--profiler --scavenger_tasks=0
+// VMOptions=--profiler --scavenger_tasks=1
+// VMOptions=--profiler --scavenger_tasks=2
+// VMOptions=--profiler --scavenger_tasks=3
+// VMOptions=--profiler --verify_before_gc
+// VMOptions=--profiler --verify_after_gc
+// VMOptions=--profiler --verify_before_gc --verify_after_gc
+// VMOptions=--profiler --verify_store_buffer
+// VMOptions=--profiler --verify_after_marking
+// VMOptions=--profiler --stress_write_barrier_elimination
+// VMOptions=--profiler --old_gen_heap_size=100
+// VMOptions=--profiler --mark_when_idle
+// VMOptions=--profiler --no_load_cse
+// VMOptions=--profiler --no_dead_store_elimination
+// VMOptions=--profiler --no_load_cse --no_dead_store_elimination
+// VMOptions=--profiler --test_il_serialization
 
 import "splay_common.dart";
 
diff --git a/runtime/vm/heap/pages.cc b/runtime/vm/heap/pages.cc
index 61e0f1789d8..24db6f48e45 100644
--- a/runtime/vm/heap/pages.cc
+++ b/runtime/vm/heap/pages.cc
@@ -1206,10 +1206,8 @@ void PageSpace::ConcurrentSweep(IsolateGroup* isolate_group) {
 }
 
 void PageSpace::Compact(Thread* thread) {
-  thread->isolate_group()->set_compaction_in_progress(true);
   GCCompactor compactor(thread, heap_);
   compactor.Compact(pages_, &freelists_[Page::kData], &pages_lock_);
-  thread->isolate_group()->set_compaction_in_progress(false);
 
   if (FLAG_verify_after_gc) {
     OS::PrintErr("Verifying after compacting...");
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index 08ffb1a70a0..f0e8ba5c3f6 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -753,14 +753,6 @@ class IsolateGroup : public IntrusiveDListEntry<IsolateGroup> {
   void VisitObjectIdRingPointers(ObjectPointerVisitor* visitor);
   void VisitWeakPersistentHandles(HandleVisitor* visitor);
 
-  bool compaction_in_progress() const {
-    return CompactionInProgressBit::decode(isolate_group_flags_);
-  }
-  void set_compaction_in_progress(bool value) {
-    isolate_group_flags_ =
-        CompactionInProgressBit::update(value, isolate_group_flags_);
-  }
-
   // In precompilation we finalize all regular classes before compiling.
   bool all_classes_finalized() const {
     return AllClassesFinalizedBit::decode(isolate_group_flags_);
@@ -807,7 +799,6 @@ class IsolateGroup : public IntrusiveDListEntry<IsolateGroup> {
 
 #define ISOLATE_GROUP_FLAG_BITS(V)                                             \
   V(AllClassesFinalized)                                                       \
-  V(CompactionInProgress)                                                      \
   V(EnableAsserts)                                                             \
   V(HasAttemptedReload)                                                        \
   V(NullSafety)                                                                \
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index b37ab567928..f0b71be02ab 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -12933,7 +12933,6 @@ ClassPtr Object::clazz() const {
   if ((raw_value & kSmiTagMask) == kSmiTag) {
     return Smi::Class();
   }
-  ASSERT(!IsolateGroup::Current()->compaction_in_progress());
   return IsolateGroup::Current()->class_table()->At(ptr()->GetClassId());
 }
 
diff --git a/runtime/vm/profiler.cc b/runtime/vm/profiler.cc
index d5ed6b3fab1..d6a97239b8b 100644
--- a/runtime/vm/profiler.cc
+++ b/runtime/vm/profiler.cc
@@ -1533,11 +1533,6 @@ void Profiler::SampleThread(Thread* thread,
       SampleThreadSingleFrame(thread, sample, pc);
       return;
     }
-    if (isolate->group()->compaction_in_progress()) {
-      // The Dart stack isn't fully walkable.
-      SampleThreadSingleFrame(thread, sample, pc);
-      return;
-    }
   }
 
   uword stack_lower = 0;