Separate module instantiate counter for asm and wasm.

src/counters.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_COUNTERS_H_
 #define V8_COUNTERS_H_
 
 #include "include/v8.h"
 #include "src/allocation.h"
 #include "src/base/atomic-utils.h"
@@ skipping 937 matching lines @@
   HT(compile_eval, V8.CompileEvalMicroSeconds, 1000000, MICROSECOND)           \
   /* Serialization as part of compilation (code caching) */                    \
   HT(compile_serialize, V8.CompileSerializeMicroSeconds, 100000, MICROSECOND)  \
   HT(compile_deserialize, V8.CompileDeserializeMicroSeconds, 1000000,          \
      MICROSECOND)                                                              \
   /* Total compilation time incl. caching/parsing */                           \
   HT(compile_script, V8.CompileScriptMicroSeconds, 1000000, MICROSECOND)       \
   /* Total JavaScript execution time (including callbacks and runtime calls */ \
   HT(execute, V8.Execute, 1000000, MICROSECOND)                                \
   /* Asm/Wasm */                                                               \
-  HT(wasm_instantiate_module_time, V8.WasmInstantiateModuleMicroSeconds,       \
+  /* TODO(karlschimpf) Update chrome flags to reflect asm/wasm split. */       \
+  HT(wasm_instantiate_asm_module_time, V8.WasmInstantiateModuleMicroSeconds,   \

[bradnelson, 2017/03/24 17:25:10]

You need to make up separate names for the chrome side part.
Maybe:
V8.AsmWasmInstantiateModuleMicroSeconds

[bradnelson, 2017/03/24 17:33:14]

Sounds like these are safe to direct to the same bucket until we're ready to
switch everything over in one step right before commiting to chromium.

+     1000000, MICROSECOND)                                                     \
+  HT(wasm_instantiate_wasm_module_time, V8.WasmInstantiateModuleMicroSeconds,  \
      1000000, MICROSECOND)                                                     \
   HT(wasm_decode_module_time, V8.WasmDecodeModuleMicroSeconds, 1000000,        \
      MICROSECOND)                                                              \
   HT(wasm_decode_function_time, V8.WasmDecodeFunctionMicroSeconds, 1000000,    \
      MICROSECOND)                                                              \
   HT(wasm_compile_module_time, V8.WasmCompileModuleMicroSeconds, 1000000,      \
      MICROSECOND)                                                              \
   HT(wasm_compile_function_time, V8.WasmCompileFunctionMicroSeconds, 1000000,  \
      MICROSECOND)                                                              \
   HT(asm_wasm_translation_time, V8.AsmWasmTranslationMicroSeconds, 1000000,    \
@@ skipping 348 matching lines @@
 
   explicit Counters(Isolate* isolate);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Counters);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COUNTERS_H_