New growth strategy for growable arrays

runtime/vm/service.cc

Index: runtime/vm/service.cc
diff --git a/runtime/vm/service.cc b/runtime/vm/service.cc
index 0d134e86371811d3bcae2afc6087014e140ebe10..554b11007a132510fcfc49489de3b01bbd516772 100644
--- a/runtime/vm/service.cc
+++ b/runtime/vm/service.cc
@@ -2353,8 +2353,9 @@ static bool Evaluate(Thread* thread, JSONStream* js) {
   if (BuildScope(thread, js, names, values)) {
     return true;
   }
-  const Array& names_array = Array::Handle(zone, Array::MakeArray(names));
-  const Array& values_array = Array::Handle(zone, Array::MakeArray(values));
+  const Array& names_array = Array::Handle(zone, Array::MakeFixedLength(names));
+  const Array& values_array =
+      Array::Handle(zone, Array::MakeFixedLength(values));
 
   const String& expr_str = String::Handle(zone, String::New(expr));
   ObjectIdRing::LookupResult lookup_result;