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Merged
merged 3 commits into from
Feb 8, 2023
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http: use v8::Array::New() with a prebuilt vector #46447

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http: use v8::Array::New() with a prebuilt vector
joyeecheung Jan 30, 2023
fb3a2cd
fixup! http: use v8::Array::New() with a prebuilt vector
joyeecheung Jan 31, 2023
39fc53a
fixup! fixup! http: use v8::Array::New() with a prebuilt vector
joyeecheung Feb 3, 2023
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51 changes: 22 additions & 29 deletions src/node_http_parser.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1037,68 +1037,60 @@ void ConnectionsList::New(const FunctionCallbackInfo<Value>& args) {

void ConnectionsList::All(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
Local<Context> context = isolate->GetCurrentContext();

Local<Array> all = Array::New(isolate);
ConnectionsList* list;

ASSIGN_OR_RETURN_UNWRAP(&list, args.Holder());

uint32_t i = 0;
std::vector<Local<Value>> result;
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What about using MaybeStackBuffer to avoid allocations if number of elements is not too high?

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@joyeecheung joyeecheung Feb 4, 2023 •
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I think v8::Array -> std::vector would make sense (to avoid C++ -> JS invocation costs) but std::vector -> MaybeStackBuffer probably would not make much difference...(and personally I prefer STL unless the home-grown alternatives makes a significant difference)

result.reserve(list->all_connections_.size());
for (auto parser : list->all_connections_) {
if (all->Set(context, i++, parser->object()).IsNothing()) {
return;
}
result.emplace_back(parser->object());
}

return args.GetReturnValue().Set(all);
return args.GetReturnValue().Set(
Array::New(isolate, result.data(), result.size()));
}

void ConnectionsList::Idle(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
Local<Context> context = isolate->GetCurrentContext();

Local<Array> idle = Array::New(isolate);
ConnectionsList* list;

ASSIGN_OR_RETURN_UNWRAP(&list, args.Holder());

uint32_t i = 0;
std::vector<Local<Value>> result;
result.reserve(list->all_connections_.size());
for (auto parser : list->all_connections_) {
if (parser->last_message_start_ == 0) {
if (idle->Set(context, i++, parser->object()).IsNothing()) {
return;
}
result.emplace_back(parser->object());
}
}

return args.GetReturnValue().Set(idle);
return args.GetReturnValue().Set(
Array::New(isolate, result.data(), result.size()));
}

void ConnectionsList::Active(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
Local<Context> context = isolate->GetCurrentContext();

Local<Array> active = Array::New(isolate);
ConnectionsList* list;

ASSIGN_OR_RETURN_UNWRAP(&list, args.Holder());

uint32_t i = 0;
std::vector<Local<Value>> result;
result.reserve(list->active_connections_.size());
for (auto parser : list->active_connections_) {
if (active->Set(context, i++, parser->object()).IsNothing()) {
return;
}
result.emplace_back(parser->object());
}

return args.GetReturnValue().Set(active);
return args.GetReturnValue().Set(
Array::New(isolate, result.data(), result.size()));
}

void ConnectionsList::Expired(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
Local<Context> context = isolate->GetCurrentContext();

Local<Array> expired = Array::New(isolate);
ConnectionsList* list;

ASSIGN_OR_RETURN_UNWRAP(&list, args.Holder());
Expand All @@ -1110,7 +1102,7 @@ void ConnectionsList::Expired(const FunctionCallbackInfo<Value>& args) {
static_cast<uint64_t>(args[1].As<Uint32>()->Value()) * 1000000;

if (headers_timeout == 0 && request_timeout == 0) {
return args.GetReturnValue().Set(expired);
return args.GetReturnValue().Set(Array::New(isolate, 0));
} else if (request_timeout > 0 && headers_timeout > request_timeout) {
std::swap(headers_timeout, request_timeout);
}
Expand All @@ -1121,9 +1113,11 @@ void ConnectionsList::Expired(const FunctionCallbackInfo<Value>& args) {
const uint64_t request_deadline =
request_timeout > 0 ? now - request_timeout : 0;

uint32_t i = 0;
auto iter = list->active_connections_.begin();
auto end = list->active_connections_.end();

std::vector<Local<Value>> result;
result.reserve(list->active_connections_.size());
while (iter != end) {
Parser* parser = *iter;
iter++;
Expand All @@ -1136,15 +1130,14 @@ void ConnectionsList::Expired(const FunctionCallbackInfo<Value>& args) {
request_deadline > 0 &&
parser->last_message_start_ < request_deadline)
) {
if (expired->Set(context, i++, parser->object()).IsNothing()) {
return;
}
result.emplace_back(parser->object());

list->active_connections_.erase(parser);
}
}

return args.GetReturnValue().Set(expired);
return args.GetReturnValue().Set(
Array::New(isolate, result.data(), result.size()));
}

const llhttp_settings_t Parser::settings = {
Expand Down