Try reducing and balance GC callback stack sizes.

Source/platform/heap/Heap.cpp

Index: Source/platform/heap/Heap.cpp
diff --git a/Source/platform/heap/Heap.cpp b/Source/platform/heap/Heap.cpp
index c3c3eaddbfea5bb8fecfd098a1bce0840bbdaae0..c963e14bcebbdec15fffaf486e4d5323c29e2b57 100644
--- a/Source/platform/heap/Heap.cpp
+++ b/Source/platform/heap/Heap.cpp
@@ -1962,18 +1962,10 @@ void Heap::flushHeapDoesNotContainCache()
 void Heap::init()
 {
     ThreadState::init();
-    s_markingStack = new CallbackStack();
-    s_postMarkingCallbackStack = new CallbackStack();
-    s_weakCallbackStack = new CallbackStack();
-    s_ephemeronStack = new CallbackStack();
-    s_heapDoesNotContainCache = new HeapDoesNotContainCache();
     s_markingVisitor = new MarkingVisitor<Visitor::GlobalMarking>();
+    s_heapDoesNotContainCache = new HeapDoesNotContainCache();
     s_freePagePool = new FreePagePool();
     s_orphanedPagePool = new OrphanedPagePool();
-    s_allocatedObjectSize = 0;
-    s_allocatedSpace = 0;
-    s_markedObjectSize = 0;
-    s_estimatedMarkingTimePerByte = 0.0;
 
     GCInfoTable::init();
 }
@@ -2259,6 +2251,7 @@ void Heap::collectGarbage(ThreadState::StackState stackState, ThreadState::GCTyp
     ThreadState::NoAllocationScope noAllocationScope(state);
 
     preGC();
+    Heap::ensureCallbackStacks();
     StackFrameDepth::configureStackLimit();
     ASSERT(StackFrameDepth::isSafeToRecurse());
 
@@ -2320,6 +2313,7 @@ void Heap::collectGarbageForTerminatingThread(ThreadState* state)
         ThreadState::NoAllocationScope noAllocationScope(state);
 
         state->preGC();
+        Heap::ensureCallbackStacks();
         StackFrameDepth::configureStackLimit();
         ASSERT(StackFrameDepth::isSafeToRecurse());
 
@@ -2674,11 +2668,22 @@ void Heap::resetHeapCounters()
     s_externalObjectSizeAtLastGC = WTF::Partitions::totalSizeOfCommittedPages();
 }
 
+void Heap::ensureCallbackStacks()
+{
+    if (s_markingStack)
+        return;
+
+    s_markingStack = new CallbackStack(CallbackStack::MarkingStackBlockSize);
+    s_postMarkingCallbackStack = new CallbackStack(CallbackStack::PostMarkingStackBlockSize);
+    s_weakCallbackStack = new CallbackStack(CallbackStack::WeakCallbackStackBlockSize);
+    s_ephemeronStack = new CallbackStack(CallbackStack::EphemeronCallbackStackBlockSize);
+}
+
 Visitor* Heap::s_markingVisitor;
-CallbackStack* Heap::s_markingStack;
-CallbackStack* Heap::s_postMarkingCallbackStack;
-CallbackStack* Heap::s_weakCallbackStack;
-CallbackStack* Heap::s_ephemeronStack;
+CallbackStack* Heap::s_markingStack = nullptr;
+CallbackStack* Heap::s_postMarkingCallbackStack = nullptr;
+CallbackStack* Heap::s_weakCallbackStack = nullptr;
+CallbackStack* Heap::s_ephemeronStack = nullptr;
 HeapDoesNotContainCache* Heap::s_heapDoesNotContainCache;
 bool Heap::s_shutdownCalled = false;
 bool Heap::s_lastGCWasConservative = false;