Uses an object pool on x64

runtime/vm/stub_code.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_STUB_CODE_H_
 #define VM_STUB_CODE_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 
@@ skipping 164 matching lines @@
 
 #define STUB_CODE_ENTRY(name)                                                  \
   static StubEntry* name##_entry_;
   VM_STUB_CODE_LIST(STUB_CODE_ENTRY);
 #undef STUB_CODE_ENTRY
 
 #define STUB_CODE_ENTRY(name)                                                  \
   StubEntry* name##_entry_;
   STUB_CODE_LIST(STUB_CODE_ENTRY);
 #undef STUB_CODE_ENTRY
-  // This dummy field is needed so that we can intialize the stubs from a macro.
+  // This dummy field is needed so that we can initialize
+  // the stubs from a macro.
   void* dummy_;
 
   // Generate the stub and finalize the generated code into the stub
   // code executable area.
   static RawCode* Generate(const char* name,
                            void (*GenerateStub)(Assembler* assembler));
 
   static void GenerateMegamorphicMissStub(Assembler* assembler);
   static void GenerateAllocationStubForClass(Assembler* assembler,
                                              const Class& cls);
@@ skipping 11 matching lines @@
       Assembler* assembler,
       const Register left,
       const Register right,
       const Register temp1 = kNoRegister,
       const Register temp2 = kNoRegister);
 };
 
 }  // namespace dart
 
 #endif  // VM_STUB_CODE_H_