fast path for api function creation

src/execution.cc

 // Copyright 2014 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.
 
 #include "src/execution.h"
 
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/isolate-inl.h"
@@ skipping 41 matching lines @@
 
 MUST_USE_RESULT static MaybeHandle<Object> Invoke(
     bool is_construct,
     Handle<JSFunction> function,
     Handle<Object> receiver,
     int argc,
     Handle<Object> args[]) {
   Isolate* isolate = function->GetIsolate();
 
   // api callbacks can be called directly.
-  if (!is_construct && function->shared()->IsApiFunction()) {
+  if (function->shared()->IsApiFunction() &&
+      (!is_construct ||
+       !function->shared()->get_api_func_data()->remove_prototype())) {
     SaveContext save(isolate);
     isolate->set_context(function->context());
-    if (receiver->IsGlobalObject()) {
+    if (is_construct) {
+      receiver = isolate->factory()->NewJSObject(function);
+    } else if (receiver->IsGlobalObject()) {
       receiver = handle(Handle<GlobalObject>::cast(receiver)->global_proxy());
     }
     DCHECK(function->context()->global_object()->IsGlobalObject());
-    auto value = Builtins::InvokeApiFunction(function, receiver, argc, args);
+    auto value = Builtins::InvokeApiFunction(function, receiver, argc, args,
+                                             is_construct);
     bool has_exception = value.is_null();
     DCHECK(has_exception == isolate->has_pending_exception());
     if (has_exception) {
       isolate->ReportPendingMessages();
       return MaybeHandle<Object>();
     } else {
       isolate->clear_pending_message();
     }
     return value;
   }
@@ skipping 606 matching lines @@
   }
 
   isolate_->counters()->stack_interrupts()->Increment();
   isolate_->counters()->runtime_profiler_ticks()->Increment();
   isolate_->runtime_profiler()->OptimizeNow();
 
   return isolate_->heap()->undefined_value();
 }
 
 } }  // namespace v8::internal