Optimize non-mutation Map and Set operations for String keys

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 286 matching lines @@
   F(CreateJSFunctionProxy, 4, 1)                       \
   F(IsJSFunctionProxy, 1, 1)                           \
   F(GetHandler, 1, 1)                                  \
   F(GetCallTrap, 1, 1)                                 \
   F(GetConstructTrap, 1, 1)                            \
   F(Fix, 1, 1)                                         \
                                                        \
   /* Harmony sets */                                   \
   F(SetInitialize, 1, 1)                               \
   F(SetAdd, 2, 1)                                      \
-  F(SetHas, 2, 1)                                      \
   F(SetDelete, 2, 1)                                   \
   F(SetClear, 1, 1)                                    \
-  F(SetGetSize, 1, 1)                                  \
                                                        \
   F(SetIteratorInitialize, 3, 1)                       \
   F(SetIteratorClone, 1, 1)                            \
   F(SetIteratorNext, 2, 1)                             \
   F(SetIteratorDetails, 1, 1)                          \
                                                        \
   /* Harmony maps */                                   \
   F(MapInitialize, 1, 1)                               \
-  F(MapGet, 2, 1)                                      \
-  F(MapHas, 2, 1)                                      \
   F(MapDelete, 2, 1)                                   \
   F(MapClear, 1, 1)                                    \
   F(MapSet, 3, 1)                                      \
-  F(MapGetSize, 1, 1)                                  \
                                                        \
   F(MapIteratorInitialize, 3, 1)                       \
   F(MapIteratorClone, 1, 1)                            \
   F(MapIteratorNext, 2, 1)                             \
   F(MapIteratorDetails, 1, 1)                          \
                                                        \
   /* Harmony weak maps and sets */                     \
   F(WeakCollectionInitialize, 1, 1)                    \
   F(WeakCollectionGet, 2, 1)                           \
   F(WeakCollectionHas, 2, 1)                           \
@@ skipping 388 matching lines @@
   F(ArrayBufferViewGetByteLength, 1, 1)   \
   F(ArrayBufferViewGetByteOffset, 1, 1)   \
   F(TypedArrayGetLength, 1, 1)            \
   /* ArrayBuffer */                       \
   F(ArrayBufferGetByteLength, 1, 1)       \
   /* Maths */                             \
   F(ConstructDouble, 2, 1)                \
   F(DoubleHi, 1, 1)                       \
   F(DoubleLo, 1, 1)                       \
   F(MathSqrtRT, 1, 1)                     \
-  F(MathLogRT, 1, 1)
+  F(MathLogRT, 1, 1)                      \
+  /* ES6 Collections */                   \
+  F(MapGet, 2, 1)                         \
+  F(MapGetSize, 1, 1)                     \
+  F(MapHas, 2, 1)                         \
+  F(SetGetSize, 1, 1)                     \
+  F(SetHas, 2, 1)
 
 
 //---------------------------------------------------------------------------
 // Runtime provides access to all C++ runtime functions.
 
 class RuntimeState {
  public:
   unibrow::Mapping<unibrow::ToUppercase, 128>* to_upper_mapping() {
     return &to_upper_mapping_;
   }
@@ skipping 145 matching lines @@
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 class DeclareGlobalsStrictMode : public BitField<StrictMode, 2, 1> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_