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src: prefer 3-argument Array::New() · nodejs/node@57302f8 · GitHub

/ node Public

Commit 57302f8

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addaleax
authored and
codebytere
committed
src: prefer 3-argument Array::New()
This is nicer, because: 1. It reduces overall code size, 2. It’s faster, because `Object::Set()` calls are relatively slow, and 3. It helps avoid invalid `.Check()`/`.FromJust()` calls. PR-URL: #31775 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: David Carlier <devnexen@gmail.com>
1 parent db291aa commit 57302f8

7 files changed

Lines changed: 85 additions & 103 deletions

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‎src/cares_wrap.cc‎

Lines changed: 14 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -749,16 +749,12 @@ Local<Array> AddrTTLToArray(Environment* env,
749749
const T* addrttls,
750750
size_t naddrttls) {
751751
auto isolate = env->isolate();
752-
EscapableHandleScope escapable_handle_scope(isolate);
753-
auto context = env->context();
754752

755-
Local<Array> ttls = Array::New(isolate, naddrttls);
756-
for (size_t i = 0; i < naddrttls; i++) {
757-
auto value = Integer::NewFromUnsigned(isolate, addrttls[i].ttl);
758-
ttls->Set(context, i, value).Check();
759-
}
753+
MaybeStackBuffer<Local<Value>, 8> ttls(naddrttls);
754+
for (size_t i = 0; i < naddrttls; i++)
755+
ttls[i] = Integer::NewFromUnsigned(isolate, addrttls[i].ttl);
760756

761-
return escapable_handle_scope.Escape(ttls);
757+
return Array::New(isolate, ttls.out(), naddrttls);
762758
}
763759

764760

@@ -2039,6 +2035,7 @@ void GetServers(const FunctionCallbackInfo<Value>& args) {
20392035

20402036
int r = ares_get_servers_ports(channel->cares_channel(), &servers);
20412037
CHECK_EQ(r, ARES_SUCCESS);
2038+
auto cleanup = OnScopeLeave([&]() { ares_free_data(servers); });
20422039

20432040
ares_addr_port_node* cur = servers;
20442041

@@ -2049,17 +2046,18 @@ void GetServers(const FunctionCallbackInfo<Value>& args) {
20492046
int err = uv_inet_ntop(cur->family, caddr, ip, sizeof(ip));
20502047
CHECK_EQ(err, 0);
20512048

2052-
Local<Array> ret = Array::New(env->isolate(), 2);
2053-
ret->Set(env->context(), 0, OneByteString(env->isolate(), ip)).Check();
2054-
ret->Set(env->context(),
2055-
1,
2056-
Integer::New(env->isolate(), cur->udp_port)).Check();
2049+
Local<Value> ret[] = {
2050+
OneByteString(env->isolate(), ip),
2051+
Integer::New(env->isolate(), cur->udp_port)
2052+
};
20572053

2058-
server_array->Set(env->context(), i, ret).Check();
2054+
if (server_array->Set(env->context(), i,
2055+
Array::New(env->isolate(), ret, arraysize(ret)))
2056+
.IsNothing()) {
2057+
return;
2058+
}
20592059
}
20602060

2061-
ares_free_data(servers);
2062-
20632061
args.GetReturnValue().Set(server_array);
20642062
}
20652063

‎src/js_stream.cc‎

Lines changed: 4 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -116,16 +116,15 @@ int JSStream::DoWrite(WriteWrap* w,
116116
HandleScope scope(env()->isolate());
117117
Context::Scope context_scope(env()->context());
118118

119-
Local<Array> bufs_arr = Array::New(env()->isolate(), count);
120-
Local<Object> buf;
119+
MaybeStackBuffer<Local<Value>, 16> bufs_arr(count);
121120
for (size_t i = 0; i < count; i++) {
122-
buf = Buffer::Copy(env(), bufs[i].base, bufs[i].len).ToLocalChecked();
123-
bufs_arr->Set(env()->context(), i, buf).Check();
121+
bufs_arr[i] =
122+
Buffer::Copy(env(), bufs[i].base, bufs[i].len).ToLocalChecked();
124123
}
125124

126125
Local<Value> argv[] = {
127126
w->object(),
128-
bufs_arr
127+
Array::New(env()->isolate(), bufs_arr.out(), count)
129128
};
130129

131130
TryCatchScope try_catch(env());

‎src/module_wrap.cc‎

Lines changed: 10 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -264,11 +264,11 @@ void ModuleWrap::Link(const FunctionCallbackInfo<Value>& args) {
264264
Local<Context> mod_context = obj->context_.Get(isolate);
265265
Local<Module> module = obj->module_.Get(isolate);
266266

267-
Local<Array> promises = Array::New(isolate,
268-
module->GetModuleRequestsLength());
267+
const int module_requests_length = module->GetModuleRequestsLength();
268+
MaybeStackBuffer<Local<Value>, 16> promises(module_requests_length);
269269

270270
// call the dependency resolve callbacks
271-
for (int i = 0; i < module->GetModuleRequestsLength(); i++) {
271+
for (int i = 0; i < module_requests_length; i++) {
272272
Local<String> specifier = module->GetModuleRequest(i);
273273
Utf8Value specifier_utf8(env->isolate(), specifier);
274274
std::string specifier_std(*specifier_utf8, specifier_utf8.length());
@@ -290,10 +290,11 @@ void ModuleWrap::Link(const FunctionCallbackInfo<Value>& args) {
290290
Local<Promise> resolve_promise = resolve_return_value.As<Promise>();
291291
obj->resolve_cache_[specifier_std].Reset(env->isolate(), resolve_promise);
292292

293-
promises->Set(mod_context, i, resolve_promise).Check();
293+
promises[i] = resolve_promise;
294294
}
295295

296-
args.GetReturnValue().Set(promises);
296+
args.GetReturnValue().Set(
297+
Array::New(isolate, promises.out(), promises.length()));
297298
}
298299

299300
void ModuleWrap::Instantiate(const FunctionCallbackInfo<Value>& args) {
@@ -426,12 +427,13 @@ void ModuleWrap::GetStaticDependencySpecifiers(
426427

427428
int count = module->GetModuleRequestsLength();
428429

429-
Local<Array> specifiers = Array::New(env->isolate(), count);
430+
MaybeStackBuffer<Local<Value>, 16> specifiers(count);
430431

431432
for (int i = 0; i < count; i++)
432-
specifiers->Set(env->context(), i, module->GetModuleRequest(i)).Check();
433+
specifiers[i] = module->GetModuleRequest(i);
433434

434-
args.GetReturnValue().Set(specifiers);
435+
args.GetReturnValue().Set(
436+
Array::New(env->isolate(), specifiers.out(), count));
435437
}
436438

437439
void ModuleWrap::GetError(const FunctionCallbackInfo<Value>& args) {

‎src/node_crypto.cc‎

Lines changed: 34 additions & 44 deletions
Original file line numberDiff line numberDiff line change
@@ -1011,19 +1011,19 @@ static X509_STORE* NewRootCertStore() {
10111011

10121012
void GetRootCertificates(const FunctionCallbackInfo<Value>& args) {
10131013
Environment* env = Environment::GetCurrent(args);
1014-
Local<Array> result = Array::New(env->isolate(), arraysize(root_certs));
1014+
Local<Value> result[arraysize(root_certs)];
10151015

10161016
for (size_t i = 0; i < arraysize(root_certs); i++) {
1017-
Local<Value> value;
1018-
if (!String::NewFromOneByte(env->isolate(),
1019-
reinterpret_cast<const uint8_t*>(root_certs[i]),
1020-
NewStringType::kNormal).ToLocal(&value) ||
1021-
!result->Set(env->context(), i, value).FromMaybe(false)) {
1017+
if (!String::NewFromOneByte(
1018+
env->isolate(),
1019+
reinterpret_cast<const uint8_t*>(root_certs[i]),
1020+
NewStringType::kNormal).ToLocal(&result[i])) {
10221021
return;
10231022
}
10241023
}
10251024

1026-
args.GetReturnValue().Set(result);
1025+
args.GetReturnValue().Set(
1026+
Array::New(env->isolate(), result, arraysize(root_certs)));
10271027
}
10281028

10291029

@@ -2138,22 +2138,22 @@ static Local<Object> X509ToObject(Environment* env, X509* cert) {
21382138
StackOfASN1 eku(static_cast<STACK_OF(ASN1_OBJECT)*>(
21392139
X509_get_ext_d2i(cert, NID_ext_key_usage, nullptr, nullptr)));
21402140
if (eku) {
2141-
Local<Array> ext_key_usage = Array::New(env->isolate());
2141+
const int count = sk_ASN1_OBJECT_num(eku.get());
2142+
MaybeStackBuffer<Local<Value>, 16> ext_key_usage(count);
21422143
char buf[256];
21432144

21442145
int j = 0;
2145-
for (int i = 0; i < sk_ASN1_OBJECT_num(eku.get()); i++) {
2146+
for (int i = 0; i < count; i++) {
21462147
if (OBJ_obj2txt(buf,
21472148
sizeof(buf),
21482149
sk_ASN1_OBJECT_value(eku.get(), i), 1) >= 0) {
2149-
ext_key_usage->Set(context,
2150-
j++,
2151-
OneByteString(env->isolate(), buf)).Check();
2150+
ext_key_usage[j++] = OneByteString(env->isolate(), buf);
21522151
}
21532152
}
21542153

21552154
eku.reset();
2156-
info->Set(context, env->ext_key_usage_string(), ext_key_usage).Check();
2155+
info->Set(context, env->ext_key_usage_string(),
2156+
Array::New(env->isolate(), ext_key_usage.out(), count)).Check();
21572157
}
21582158

21592159
if (ASN1_INTEGER* serial_number = X509_get_serialNumber(cert)) {
@@ -6799,15 +6799,8 @@ void GenerateKeyPair(const FunctionCallbackInfo<Value>& args,
67996799
Local<Value> err, pubkey, privkey;
68006800
job->ToResult(&err, &pubkey, &privkey);
68016801

6802-
bool (*IsNotTrue)(Maybe<bool>) = [](Maybe<bool> maybe) {
6803-
return maybe.IsNothing() || !maybe.ToChecked();
6804-
};
6805-
Local<Array> ret = Array::New(env->isolate(), 3);
6806-
if (IsNotTrue(ret->Set(env->context(), 0, err)) ||
6807-
IsNotTrue(ret->Set(env->context(), 1, pubkey)) ||
6808-
IsNotTrue(ret->Set(env->context(), 2, privkey)))
6809-
return;
6810-
args.GetReturnValue().Set(ret);
6802+
Local<Value> ret[] = { err, pubkey, privkey };
6803+
args.GetReturnValue().Set(Array::New(env->isolate(), ret, arraysize(ret)));
68116804
}
68126805

68136806
void GenerateKeyPairRSA(const FunctionCallbackInfo<Value>& args) {
@@ -6940,17 +6933,6 @@ void GetSSLCiphers(const FunctionCallbackInfo<Value>& args) {
69406933
CHECK(ssl);
69416934

69426935
STACK_OF(SSL_CIPHER)* ciphers = SSL_get_ciphers(ssl.get());
6943-
int n = sk_SSL_CIPHER_num(ciphers);
6944-
Local<Array> arr = Array::New(env->isolate(), n);
6945-
6946-
for (int i = 0; i < n; ++i) {
6947-
const SSL_CIPHER* cipher = sk_SSL_CIPHER_value(ciphers, i);
6948-
arr->Set(env->context(),
6949-
i,
6950-
OneByteString(args.GetIsolate(),
6951-
SSL_CIPHER_get_name(cipher))).Check();
6952-
}
6953-
69546936
// TLSv1.3 ciphers aren't listed by EVP. There are only 5, we could just
69556937
// document them, but since there are only 5, easier to just add them manually
69566938
// and not have to explain their absence in the API docs. They are lower-cased
@@ -6963,13 +6945,20 @@ void GetSSLCiphers(const FunctionCallbackInfo<Value>& args) {
69636945
"tls_aes_128_ccm_sha256"
69646946
};
69656947

6948+
const int n = sk_SSL_CIPHER_num(ciphers);
6949+
std::vector<Local<Value>> arr(n + arraysize(TLS13_CIPHERS));
6950+
6951+
for (int i = 0; i < n; ++i) {
6952+
const SSL_CIPHER* cipher = sk_SSL_CIPHER_value(ciphers, i);
6953+
arr[i] = OneByteString(env->isolate(), SSL_CIPHER_get_name(cipher));
6954+
}
6955+
69666956
for (unsigned i = 0; i < arraysize(TLS13_CIPHERS); ++i) {
69676957
const char* name = TLS13_CIPHERS[i];
6968-
arr->Set(env->context(),
6969-
arr->Length(), OneByteString(args.GetIsolate(), name)).Check();
6958+
arr[n + i] = OneByteString(env->isolate(), name);
69706959
}
69716960

6972-
args.GetReturnValue().Set(arr);
6961+
args.GetReturnValue().Set(Array::New(env->isolate(), arr.data(), arr.size()));
69736962
}
69746963

69756964

@@ -7020,22 +7009,23 @@ void GetHashes(const FunctionCallbackInfo<Value>& args) {
70207009
void GetCurves(const FunctionCallbackInfo<Value>& args) {
70217010
Environment* env = Environment::GetCurrent(args);
70227011
const size_t num_curves = EC_get_builtin_curves(nullptr, 0);
7023-
Local<Array> arr = Array::New(env->isolate(), num_curves);
70247012

70257013
if (num_curves) {
70267014
std::vector<EC_builtin_curve> curves(num_curves);
70277015

70287016
if (EC_get_builtin_curves(curves.data(), num_curves)) {
7029-
for (size_t i = 0; i < num_curves; i++) {
7030-
arr->Set(env->context(),
7031-
i,
7032-
OneByteString(env->isolate(),
7033-
OBJ_nid2sn(curves[i].nid))).Check();
7034-
}
7017+
std::vector<Local<Value>> arr(num_curves);
7018+
7019+
for (size_t i = 0; i < num_curves; i++)
7020+
arr[i] = OneByteString(env->isolate(), OBJ_nid2sn(curves[i].nid));
7021+
7022+
args.GetReturnValue().Set(
7023+
Array::New(env->isolate(), arr.data(), arr.size()));
7024+
return;
70357025
}
70367026
}
70377027

7038-
args.GetReturnValue().Set(arr);
7028+
args.GetReturnValue().Set(Array::New(env->isolate()));
70397029
}
70407030

70417031

‎src/node_file.cc‎

Lines changed: 10 additions & 17 deletions
Original file line numberDiff line numberDiff line change
@@ -700,16 +700,11 @@ void AfterScanDirWithTypes(uv_fs_t* req) {
700700
type_v.emplace_back(Integer::New(isolate, ent.type));
701701
}
702702

703-
Local<Array> result = Array::New(isolate, 2);
704-
result->Set(env->context(),
705-
0,
706-
Array::New(isolate, name_v.data(),
707-
name_v.size())).Check();
708-
result->Set(env->context(),
709-
1,
710-
Array::New(isolate, type_v.data(),
711-
type_v.size())).Check();
712-
req_wrap->Resolve(result);
703+
Local<Value> result[] = {
704+
Array::New(isolate, name_v.data(), name_v.size()),
705+
Array::New(isolate, type_v.data(), type_v.size())
706+
};
707+
req_wrap->Resolve(Array::New(isolate, result, arraysize(result)));
713708
}
714709

715710
void Access(const FunctionCallbackInfo<Value>& args) {
@@ -1519,13 +1514,11 @@ static void ReadDir(const FunctionCallbackInfo<Value>& args) {
15191514

15201515
Local<Array> names = Array::New(isolate, name_v.data(), name_v.size());
15211516
if (with_types) {
1522-
Local<Array> result = Array::New(isolate, 2);
1523-
result->Set(env->context(), 0, names).Check();
1524-
result->Set(env->context(),
1525-
1,
1526-
Array::New(isolate, type_v.data(),
1527-
type_v.size())).Check();
1528-
args.GetReturnValue().Set(result);
1517+
Local<Value> result[] = {
1518+
names,
1519+
Array::New(isolate, type_v.data(), type_v.size())
1520+
};
1521+
args.GetReturnValue().Set(Array::New(isolate, result, arraysize(result)));
15291522
} else {
15301523
args.GetReturnValue().Set(names);
15311524
}

‎src/node_v8.cc‎

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -218,19 +218,19 @@ void Initialize(Local<Object> target,
218218
// Heap space names are extracted once and exposed to JavaScript to
219219
// avoid excessive creation of heap space name Strings.
220220
HeapSpaceStatistics s;
221-
const Local<Array> heap_spaces = Array::New(env->isolate(),
222-
number_of_heap_spaces);
221+
MaybeStackBuffer<Local<Value>, 16> heap_spaces(number_of_heap_spaces);
223222
for (size_t i = 0; i < number_of_heap_spaces; i++) {
224223
env->isolate()->GetHeapSpaceStatistics(&s, i);
225-
Local<String> heap_space_name = String::NewFromUtf8(env->isolate(),
226-
s.space_name(),
227-
NewStringType::kNormal)
228-
.ToLocalChecked();
229-
heap_spaces->Set(env->context(), i, heap_space_name).Check();
224+
heap_spaces[i] = String::NewFromUtf8(env->isolate(),
225+
s.space_name(),
226+
NewStringType::kNormal)
227+
.ToLocalChecked();
230228
}
231229
target->Set(env->context(),
232230
FIXED_ONE_BYTE_STRING(env->isolate(), "kHeapSpaces"),
233-
heap_spaces).Check();
231+
Array::New(env->isolate(),
232+
heap_spaces.out(),
233+
number_of_heap_spaces)).Check();
234234

235235
env->SetMethod(target,
236236
"updateHeapSpaceStatisticsArrayBuffer",

‎src/spawn_sync.cc‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -721,18 +721,18 @@ Local<Array> SyncProcessRunner::BuildOutputArray() {
721721
CHECK(!stdio_pipes_.empty());
722722

723723
EscapableHandleScope scope(env()->isolate());
724-
Local<Context> context = env()->context();
725-
Local<Array> js_output = Array::New(env()->isolate(), stdio_count_);
724+
MaybeStackBuffer<Local<Value>, 8> js_output(stdio_pipes_.size());
726725

727726
for (uint32_t i = 0; i < stdio_pipes_.size(); i++) {
728727
SyncProcessStdioPipe* h = stdio_pipes_[i].get();
729728
if (h != nullptr && h->writable())
730-
js_output->Set(context, i, h->GetOutputAsBuffer(env())).Check();
729+
js_output[i] = h->GetOutputAsBuffer(env());
731730
else
732-
js_output->Set(context, i, Null(env()->isolate())).Check();
731+
js_output[i] = Null(env()->isolate());
733732
}
734733

735-
return scope.Escape(js_output);
734+
return scope.Escape(
735+
Array::New(env()->isolate(), js_output.out(), js_output.length()));
736736
}
737737

738738
Maybe<int> SyncProcessRunner::ParseOptions(Local<Value> js_value) {

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