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perf: prefer NewFromUtf8Literal() over NewFromUtf8() for string literals (#44427)

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* perf: prefer NewFromUtf8Literal() over NewFromUtf8() for string literals

the string length is known at compile time and no need to call ToLocalChecked()

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: string length is known when calling NewFromUtf8(), so use it

Co-authored-by: Charles Kerr <charles@charleskerr.com>

* perf: remove unnecessary calls to c_str()

these just force the code being called to have to recalculate the string length

Co-authored-by: Charles Kerr <charles@charleskerr.com>

---------

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Charles Kerr <charles@charleskerr.com>
This commit is contained in:
trop[bot] 2024-10-28 10:51:41 -05:00 committed by GitHub
parent 2138b5a3e0
commit 1a2015c87d
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GPG key ID: B5690EEEBB952194
4 changed files with 22 additions and 24 deletions
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3
shell/common/api/electron_api_asar.cc
View file

@ -18,8 +18,7 @@ class Archive : public node::ObjectWrap {
static v8::Local<v8::FunctionTemplate> CreateFunctionTemplate( static v8::Local<v8::FunctionTemplate> CreateFunctionTemplate(
v8::Isolate* isolate) { v8::Isolate* isolate) {
auto tpl = v8::FunctionTemplate::New(isolate, Archive::New); auto tpl = v8::FunctionTemplate::New(isolate, Archive::New);
tpl->SetClassName( tpl->SetClassName(v8::String::NewFromUtf8Literal(isolate, "Archive"));
v8::String::NewFromUtf8(isolate, "Archive").ToLocalChecked());
tpl->InstanceTemplate()->SetInternalFieldCount(1); tpl->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(tpl, "getFileInfo", &Archive::GetFileInfo); NODE_SET_PROTOTYPE_METHOD(tpl, "getFileInfo", &Archive::GetFileInfo);

33
shell/renderer/api/electron_api_web_frame.cc
View file

@ -146,7 +146,7 @@ class ScriptExecutionCallback {
const v8::Local<v8::Object>& result) { const v8::Local<v8::Object>& result) {
v8::MaybeLocal<v8::Value> maybe_result; v8::MaybeLocal<v8::Value> maybe_result;
bool success = true; bool success = true;
std::string error_message = std::string errmsg =
"An unknown exception occurred while getting the result of the script"; "An unknown exception occurred while getting the result of the script";
{ {
v8::TryCatch try_catch(isolate); v8::TryCatch try_catch(isolate);
@ -164,7 +164,7 @@ class ScriptExecutionCallback {
auto message = try_catch.Message(); auto message = try_catch.Message();
if (!message.IsEmpty()) { if (!message.IsEmpty()) {
gin::ConvertFromV8(isolate, message->Get(), &error_message); gin::ConvertFromV8(isolate, message->Get(), &errmsg);
} }
} }
} }
@ -173,10 +173,11 @@ class ScriptExecutionCallback {
if (callback_) if (callback_)
std::move(callback_).Run( std::move(callback_).Run(
v8::Undefined(isolate), v8::Undefined(isolate),
v8::Exception::Error( v8::Exception::Error(v8::String::NewFromUtf8(
v8::String::NewFromUtf8(isolate, error_message.c_str()) isolate, errmsg.data(),
v8::NewStringType::kNormal, errmsg.size())
.ToLocalChecked())); .ToLocalChecked()));
promise_.RejectWithErrorMessage(error_message); promise_.RejectWithErrorMessage(errmsg);
} else { } else {
v8::Local<v8::Context> context = promise_.GetContext(); v8::Local<v8::Context> context = promise_.GetContext();
v8::Context::Scope context_scope(context); v8::Context::Scope context_scope(context);
@ -210,7 +211,7 @@ class ScriptExecutionCallback {
promise_.Resolve(value); promise_.Resolve(value);
} }
} else { } else {
const char error_message[] = const char errmsg[] =
"Script failed to execute, this normally means an error " "Script failed to execute, this normally means an error "
"was thrown. Check the renderer console for the error."; "was thrown. Check the renderer console for the error.";
if (!callback_.is_null()) { if (!callback_.is_null()) {
@ -219,13 +220,12 @@ class ScriptExecutionCallback {
std::move(callback_).Run( std::move(callback_).Run(
v8::Undefined(isolate), v8::Undefined(isolate),
v8::Exception::Error( v8::Exception::Error(
v8::String::NewFromUtf8(isolate, error_message) v8::String::NewFromUtf8Literal(isolate, errmsg)));
.ToLocalChecked()));
} }
promise_.RejectWithErrorMessage(error_message); promise_.RejectWithErrorMessage(errmsg);
} }
} else { } else {
const char error_message[] = const char errmsg[] =
"WebFrame was removed before script could run. This normally means " "WebFrame was removed before script could run. This normally means "
"the underlying frame was destroyed"; "the underlying frame was destroyed";
if (!callback_.is_null()) { if (!callback_.is_null()) {
@ -233,10 +233,10 @@ class ScriptExecutionCallback {
v8::Context::Scope context_scope(context); v8::Context::Scope context_scope(context);
std::move(callback_).Run( std::move(callback_).Run(
v8::Undefined(isolate), v8::Undefined(isolate),
v8::Exception::Error(v8::String::NewFromUtf8(isolate, error_message) v8::Exception::Error(
.ToLocalChecked())); v8::String::NewFromUtf8Literal(isolate, errmsg)));
} }
promise_.RejectWithErrorMessage(error_message); promise_.RejectWithErrorMessage(errmsg);
} }
delete this; delete this;
} }
@ -716,15 +716,14 @@ class WebFrameRenderer final : public gin::Wrappable<WebFrameRenderer>,
script.Get("url", &url); script.Get("url", &url);
if (!script.Get("code", &code)) { if (!script.Get("code", &code)) {
const char error_message[] = "Invalid 'code'"; const char errmsg[] = "Invalid 'code'";
if (!completion_callback.is_null()) { if (!completion_callback.is_null()) {
std::move(completion_callback) std::move(completion_callback)
.Run(v8::Undefined(isolate), .Run(v8::Undefined(isolate),
v8::Exception::Error( v8::Exception::Error(
v8::String::NewFromUtf8(isolate, error_message) v8::String::NewFromUtf8Literal(isolate, errmsg)));
.ToLocalChecked()));
} }
promise.RejectWithErrorMessage(error_message); promise.RejectWithErrorMessage(errmsg);
return handle; return handle;
} }

4
shell/renderer/electron_renderer_client.cc
View file

@ -121,11 +121,11 @@ void ElectronRendererClient::DidCreateScriptContext(
"Headers"}; "Headers"};
for (const auto& key : keys) { for (const auto& key : keys) {
v8::MaybeLocal<v8::Value> value = v8::MaybeLocal<v8::Value> value =
global->Get(renderer_context, gin::StringToV8(isolate, key.c_str())); global->Get(renderer_context, gin::StringToV8(isolate, key));
if (!value.IsEmpty()) { if (!value.IsEmpty()) {
std::string blink_key = "blink" + key; std::string blink_key = "blink" + key;
global global
->Set(renderer_context, gin::StringToV8(isolate, blink_key.c_str()), ->Set(renderer_context, gin::StringToV8(isolate, blink_key),
value.ToLocalChecked()) value.ToLocalChecked())
.Check(); .Check();
} }

4
shell/renderer/electron_sandboxed_renderer_client.cc
View file

@ -60,7 +60,7 @@ v8::Local<v8::Value> GetBinding(v8::Isolate* isolate,
std::string binding_key = gin::V8ToString(isolate, key); std::string binding_key = gin::V8ToString(isolate, key);
gin_helper::Dictionary cache(isolate, GetBindingCache(isolate)); gin_helper::Dictionary cache(isolate, GetBindingCache(isolate));
if (cache.Get(binding_key.c_str(), &exports)) { if (cache.Get(binding_key, &exports)) {
return exports; return exports;
} }
@ -79,7 +79,7 @@ v8::Local<v8::Value> GetBinding(v8::Isolate* isolate,
DCHECK_NE(mod->nm_context_register_func, nullptr); DCHECK_NE(mod->nm_context_register_func, nullptr);
mod->nm_context_register_func(exports, v8::Null(isolate), mod->nm_context_register_func(exports, v8::Null(isolate),
isolate->GetCurrentContext(), mod->nm_priv); isolate->GetCurrentContext(), mod->nm_priv);
cache.Set(binding_key.c_str(), exports); cache.Set(binding_key, exports);
return exports; return exports;
} }