src: avoid unnecessary string -> char* -> string round trips

In these places we can just generate `std::string` directly, so
there's no need to convert to an intermediate C string.

PR-URL: #60055
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: addaleax

src/inspector/protocol_helper.h

@@ -19,7 +19,7 @@ inline std::unique_ptr<v8_inspector::StringBuffer> ToInspectorString(
 inline protocol::String ToProtocolString(v8::Isolate* isolate,
                                          v8::Local<v8::Value> value) {
   Utf8Value buffer(isolate, value);
-  return *buffer;
+  return buffer.ToString();
 }
 
 }  // namespace node::inspector

src/node_blob.cc

@@ -439,11 +439,9 @@ void Blob::StoreDataObject(const FunctionCallbackInfo<Value>& args) {
   Utf8Value type(isolate, args[3]);
 
   binding_data->store_data_object(
-      std::string(*key, key.length()),
+      key.ToString(),
       BlobBindingData::StoredDataObject(
-        BaseObjectPtr<Blob>(blob),
-        length,
-        std::string(*type, type.length())));
+          BaseObjectPtr<Blob>(blob), length, type.ToString()));
 }
 
 // Note: applying the V8 Fast API to the following function does not produce
@@ -483,7 +481,7 @@ void Blob::GetDataObject(const FunctionCallbackInfo<Value>& args) {
   Utf8Value key(isolate, args[0]);
 
   BlobBindingData::StoredDataObject stored =
-      binding_data->get_data_object(std::string(*key, key.length()));
+      binding_data->get_data_object(key.ToString());
   if (stored.blob) {
     Local<Value> type;
     if (!String::NewFromUtf8(isolate,

src/node_contextify.cc

@@ -292,10 +292,10 @@ BaseObjectPtr<ContextifyContext> ContextifyContext::New(
                               options->allow_code_gen_wasm);
 
   Utf8Value name_val(env->isolate(), options->name);
-  ContextInfo info(*name_val);
+  ContextInfo info(name_val.ToString());
   if (!options->origin.IsEmpty()) {
     Utf8Value origin_val(env->isolate(), options->origin);
-    info.origin = *origin_val;
+    info.origin = origin_val.ToString();
   }
 
   BaseObjectPtr<ContextifyContext> result;

src/node_errors.h

@@ -268,12 +268,12 @@ inline void THROW_ERR_REQUIRE_ASYNC_MODULE(
   if (!parent_filename.IsEmpty() && parent_filename->IsString()) {
     Utf8Value utf8(env->isolate(), parent_filename);
     message += "\n  From ";
-    message += utf8.out();
+    message += utf8.ToStringView();
   }
   if (!filename.IsEmpty() && filename->IsString()) {
     Utf8Value utf8(env->isolate(), filename);
     message += "\n  Requiring ";
-    message += +utf8.out();
+    message += utf8.ToStringView();
   }
   THROW_ERR_REQUIRE_ASYNC_MODULE(env, message.c_str());
 }

src/node_messaging.cc

@@ -1357,7 +1357,7 @@ std::unique_ptr<TransferData> JSTransferable::TransferOrClone() const {
   }
   Utf8Value deserialize_info_str(env()->isolate(), deserialize_info);
   if (*deserialize_info_str == nullptr) return {};
-  return std::make_unique<Data>(*deserialize_info_str,
+  return std::make_unique<Data>(deserialize_info_str.ToString(),
                                 Global<Value>(env()->isolate(), data));
 }
 

src/quic/defs.h

@@ -39,7 +39,7 @@ bool SetOption(Environment* env,
   if (!object->Get(env->context(), name).ToLocal(&value)) return false;
   if (!value->IsUndefined()) {
     Utf8Value utf8(env->isolate(), value);
-    options->*member = *utf8;
+    options->*member = utf8.ToString();
   }
   return true;
 }