--- old/src/hotspot/cpu/x86/c1_globals_x86.hpp	2019-03-11 14:24:50.894356196 +0100
+++ new/src/hotspot/cpu/x86/c1_globals_x86.hpp	2019-03-11 14:24:50.682356199 +0100
@@ -39,7 +39,7 @@
 define_pd_global(bool, PreferInterpreterNativeStubs,   false);
 define_pd_global(bool, ProfileTraps,                   false);
 define_pd_global(bool, UseOnStackReplacement,          true );
-define_pd_global(bool, TieredCompilation,              false);
+define_pd_global(bool, TieredCompilation,              true);
 define_pd_global(intx, CompileThreshold,               1500 );
 
 define_pd_global(intx,   OnStackReplacePercentage,     933  );