[VM-corelib] Improve performance for very big maps and sets.

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
diff --git a/runtime/vm/flow_graph_inliner.cc b/runtime/vm/flow_graph_inliner.cc
index ea91be7c074807b7c2608bc1a15a2d65b2a8c807..1a570208150cdae13e39db08c083032aa10f5b44 100644
--- a/runtime/vm/flow_graph_inliner.cc
+++ b/runtime/vm/flow_graph_inliner.cc
@@ -1268,8 +1268,10 @@ class CallSiteInliner : public ValueObject {
           (call_info[call_idx].ratio * 100) < FLAG_inlining_hotness) {
         if (trace_inlining()) {
           String& name = String::Handle(target.QualifiedUserVisibleName());
-          THR_Print("  => %s (deopt count %d)\n     Bailout: cold %f\n",
+          THR_Print("  => %s (deopt count %d, optimized instructions %" Pd
+                    ")\n     Bailout: cold %f\n",
                     name.ToCString(), target.deoptimization_counter(),
+                    target.optimized_instruction_count(),
                     call_info[call_idx].ratio);
         }
         PRINT_INLINING_TREE("Too cold", &call_info[call_idx].caller(),