Use a dictionary-mode code cache on the map rather than a dual system.

src/log.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_LOG_H_
 #define V8_LOG_H_
 
 #include <string>
 
 #include "src/allocation.h"
@@ skipping 82 matching lines @@
   V(SNAPSHOT_CODE_NAME_EVENT, "snapshot-code-name")                      \
   V(TICK_EVENT, "tick")                                                  \
   V(REPEAT_META_EVENT, "repeat")                                         \
   V(BUILTIN_TAG, "Builtin")                                              \
   V(CALL_DEBUG_BREAK_TAG, "CallDebugBreak")                              \
   V(CALL_DEBUG_PREPARE_STEP_IN_TAG, "CallDebugPrepareStepIn")            \
   V(CALL_INITIALIZE_TAG, "CallInitialize")                               \
   V(CALL_MEGAMORPHIC_TAG, "CallMegamorphic")                             \
   V(CALL_MISS_TAG, "CallMiss")                                           \
   V(CALL_NORMAL_TAG, "CallNormal")                                       \
-  V(CALL_PRE_MONOMORPHIC_TAG, "CallPreMonomorphic")                      \
   V(LOAD_INITIALIZE_TAG, "LoadInitialize")                               \
-  V(LOAD_PREMONOMORPHIC_TAG, "LoadPreMonomorphic")                       \
   V(LOAD_MEGAMORPHIC_TAG, "LoadMegamorphic")                             \
   V(STORE_INITIALIZE_TAG, "StoreInitialize")                             \
-  V(STORE_PREMONOMORPHIC_TAG, "StorePreMonomorphic")                     \
   V(STORE_GENERIC_TAG, "StoreGeneric")                                   \
   V(STORE_MEGAMORPHIC_TAG, "StoreMegamorphic")                           \
   V(KEYED_CALL_DEBUG_BREAK_TAG, "KeyedCallDebugBreak")                   \
   V(KEYED_CALL_DEBUG_PREPARE_STEP_IN_TAG, "KeyedCallDebugPrepareStepIn") \
   V(KEYED_CALL_INITIALIZE_TAG, "KeyedCallInitialize")                    \
   V(KEYED_CALL_MEGAMORPHIC_TAG, "KeyedCallMegamorphic")                  \
   V(KEYED_CALL_MISS_TAG, "KeyedCallMiss")                                \
   V(KEYED_CALL_NORMAL_TAG, "KeyedCallNormal")                            \
-  V(KEYED_CALL_PRE_MONOMORPHIC_TAG, "KeyedCallPreMonomorphic")           \
   V(CALLBACK_TAG, "Callback")                                            \
   V(EVAL_TAG, "Eval")                                                    \
   V(FUNCTION_TAG, "Function")                                            \
   V(HANDLER_TAG, "Handler")                                              \
   V(BYTECODE_HANDLER_TAG, "BytecodeHandler")                             \
   V(KEYED_LOAD_IC_TAG, "KeyedLoadIC")                                    \
   V(KEYED_LOAD_POLYMORPHIC_IC_TAG, "KeyedLoadPolymorphicIC")             \
   V(KEYED_EXTERNAL_ARRAY_LOAD_IC_TAG, "KeyedExternalArrayLoadIC")        \
   V(KEYED_STORE_IC_TAG, "KeyedStoreIC")                                  \
   V(KEYED_STORE_POLYMORPHIC_IC_TAG, "KeyedStorePolymorphicIC")           \
@@ skipping 400 matching lines @@
 
   NameBuffer* name_buffer_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 
 #endif  // V8_LOG_H_