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process: js fast path for cached bindings #18365

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process: js fast path for cached bindings #18365

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56db1ab
process: js fast path for cached bindings
apapirovski Jan 25, 2018
753a081
fixup: move the full caching functionality to JS
apapirovski Jan 25, 2018
b5fb9c1
fixup: bnoordhuis comment
apapirovski Jan 25, 2018
ea60d2c
process: move moduleLoadList definition & usage to JS
apapirovski Jan 25, 2018
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53 changes: 49 additions & 4 deletions lib/internal/bootstrap_node.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,6 @@

setupProcessObject();

internalBinding = process._internalBinding;
delete process._internalBinding;

// do this good and early, since it handles errors.
setupProcessFatal();

Expand Down Expand Up @@ -246,6 +243,54 @@
perf.markMilestone(NODE_PERFORMANCE_MILESTONE_BOOTSTRAP_COMPLETE);
}

const moduleLoadList = [];
Object.defineProperty(process, 'moduleLoadList', {
value: moduleLoadList,
configurable: true,
enumerable: true,
writable: false
});

{
const bindingObj = Object.create(null);

const getBinding = process.binding;
process.binding = function binding(module) {
module = String(module);
let mod = bindingObj[module];
if (typeof mod !== 'object') {
mod = bindingObj[module] = getBinding(module);
moduleLoadList.push(`Binding ${module}`);
}
return mod;
};

const getLinkedBinding = process._linkedBinding;
process._linkedBinding = function _linkedBinding(module) {
module = String(module);
let mod = bindingObj[module];
if (typeof mod !== 'object')
mod = bindingObj[module] = getLinkedBinding(module);
return mod;
};
}

{
const bindingObj = Object.create(null);

const getInternalBinding = process._internalBinding;
delete process._internalBinding;

internalBinding = function internalBinding(module) {
let mod = bindingObj[module];
if (typeof mod !== 'object') {
mod = bindingObj[module] = getInternalBinding(module);
moduleLoadList.push(`Internal Binding ${module}`);
}
return mod;
};
}

function setupProcessObject() {
process._setupProcessObject(pushValueToArray);

Expand Down Expand Up @@ -550,7 +595,7 @@
throw err;
}

process.moduleLoadList.push(`NativeModule ${id}`);
moduleLoadList.push(`NativeModule ${id}`);

const nativeModule = new NativeModule(id);

Expand Down
12 changes: 0 additions & 12 deletions src/env-inl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -329,18 +329,6 @@ inline Environment::Environment(IsolateData* isolate_data,
v8::Context::Scope context_scope(context);
set_as_external(v8::External::New(isolate(), this));

v8::Local<v8::Primitive> null = v8::Null(isolate());
v8::Local<v8::Object> binding_cache_object = v8::Object::New(isolate());
CHECK(binding_cache_object->SetPrototype(context, null).FromJust());
set_binding_cache_object(binding_cache_object);

v8::Local<v8::Object> internal_binding_cache_object =
v8::Object::New(isolate());
CHECK(internal_binding_cache_object->SetPrototype(context, null).FromJust());
set_internal_binding_cache_object(internal_binding_cache_object);

set_module_load_list_array(v8::Array::New(isolate()));

AssignToContext(context, ContextInfo(""));

destroy_async_id_list_.reserve(512);
Expand Down
3 changes: 0 additions & 3 deletions src/env.h
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Expand Up @@ -277,8 +277,6 @@ class ModuleWrap;
V(async_hooks_after_function, v8::Function) \
V(async_hooks_promise_resolve_function, v8::Function) \
V(async_hooks_binding, v8::Object) \
V(binding_cache_object, v8::Object) \
V(internal_binding_cache_object, v8::Object) \
V(buffer_prototype_object, v8::Object) \
V(context, v8::Context) \
V(host_import_module_dynamically_callback, v8::Function) \
Expand All @@ -287,7 +285,6 @@ class ModuleWrap;
V(http2settings_constructor_template, v8::ObjectTemplate) \
V(immediate_callback_function, v8::Function) \
V(inspector_console_api_object, v8::Object) \
V(module_load_list_array, v8::Array) \
V(pbkdf2_constructor_template, v8::ObjectTemplate) \
V(pipe_constructor_template, v8::FunctionTemplate) \
V(performance_entry_callback, v8::Function) \
Expand Down
65 changes: 6 additions & 59 deletions src/node.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2526,22 +2526,6 @@ Maybe<bool> ProcessEmitDeprecationWarning(Environment* env,
}


static bool PullFromCache(Environment* env,
const FunctionCallbackInfo<Value>& args,
Local<String> module,
Local<Object> cache) {
Local<Context> context = env->context();
Local<Value> exports_v;
Local<Object> exports;
if (cache->Get(context, module).ToLocal(&exports_v) &&
exports_v->IsObject() &&
exports_v->ToObject(context).ToLocal(&exports)) {
args.GetReturnValue().Set(exports);
return true;
}
return false;
}

static Local<Object> InitModule(Environment* env,
node_module* mod,
Local<String> module) {
Expand Down Expand Up @@ -2569,22 +2553,10 @@ static void ThrowIfNoSuchModule(Environment* env, const char* module_v) {
static void Binding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);

Local<String> module;
if (!args[0]->ToString(env->context()).ToLocal(&module)) return;

Local<Object> cache = env->binding_cache_object();

if (PullFromCache(env, args, module, cache))
return;
CHECK(args[0]->IsString());

// Append a string to process.moduleLoadList
char buf[1024];
Local<String> module = args[0].As<String>();
node::Utf8Value module_v(env->isolate(), module);
snprintf(buf, sizeof(buf), "Binding %s", *module_v);

Local<Array> modules = env->module_load_list_array();
uint32_t l = modules->Length();
modules->Set(l, OneByteString(env->isolate(), buf));

node_module* mod = get_builtin_module(*module_v);
Local<Object> exports;
Expand All @@ -2601,50 +2573,31 @@ static void Binding(const FunctionCallbackInfo<Value>& args) {
} else {
return ThrowIfNoSuchModule(env, *module_v);
}
cache->Set(module, exports);

args.GetReturnValue().Set(exports);
}

static void InternalBinding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);

Local<String> module;
if (!args[0]->ToString(env->context()).ToLocal(&module)) return;

Local<Object> cache = env->internal_binding_cache_object();

if (PullFromCache(env, args, module, cache))
return;
CHECK(args[0]->IsString());

// Append a string to process.moduleLoadList
char buf[1024];
Local<String> module = args[0].As<String>();
node::Utf8Value module_v(env->isolate(), module);
snprintf(buf, sizeof(buf), "Internal Binding %s", *module_v);

Local<Array> modules = env->module_load_list_array();
uint32_t l = modules->Length();
modules->Set(l, OneByteString(env->isolate(), buf));

node_module* mod = get_internal_module(*module_v);
if (mod == nullptr) return ThrowIfNoSuchModule(env, *module_v);
Local<Object> exports = InitModule(env, mod, module);
cache->Set(module, exports);

args.GetReturnValue().Set(exports);
}

static void LinkedBinding(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args.GetIsolate());

Local<String> module_name;
if (!args[0]->ToString(env->context()).ToLocal(&module_name)) return;

Local<Object> cache = env->binding_cache_object();
Local<Value> exports_v = cache->Get(module_name);
CHECK(args[0]->IsString());

if (exports_v->IsObject())
return args.GetReturnValue().Set(exports_v.As<Object>());
Local<String> module_name = args[0].As<String>();

node::Utf8Value module_name_v(env->isolate(), module_name);
node_module* mod = get_linked_module(*module_name_v);
Expand Down Expand Up @@ -2675,7 +2628,6 @@ static void LinkedBinding(const FunctionCallbackInfo<Value>& args) {
}

auto effective_exports = module->Get(exports_prop);
cache->Set(module_name, effective_exports);

args.GetReturnValue().Set(effective_exports);
}
Expand Down Expand Up @@ -3003,11 +2955,6 @@ void SetupProcessObject(Environment* env,
"version",
FIXED_ONE_BYTE_STRING(env->isolate(), NODE_VERSION));

// process.moduleLoadList
READONLY_PROPERTY(process,
"moduleLoadList",
env->module_load_list_array());

// process.versions
Local<Object> versions = Object::New(env->isolate());
READONLY_PROPERTY(process, "versions", versions);
Expand Down