--- old/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-09-07 21:51:31.000000000 +0200
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.cpp	2019-09-07 21:51:31.000000000 +0200
@@ -2521,7 +2521,6 @@
 }
 
 void G1CollectedHeap::gc_prologue(bool full) {
-  // always_do_update_barrier = false;
   assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer");
 
   // This summary needs to be printed before incrementing total collections.
@@ -2555,7 +2554,6 @@
 #if COMPILER2_OR_JVMCI
   assert(DerivedPointerTable::is_empty(), "derived pointer present");
 #endif
-  // always_do_update_barrier = true;
 
   double start = os::elapsedTime();
   resize_all_tlabs();