我的代码非常简单:
struct Dyn {
float *ptr;
int n;
};
void setWeakFunction1(const WeakCallbackInfo<Dyn> &data) {
}
void setWeakFunction(const WeakCallbackInfo<Dyn> &data) {
auto *v = data.GetParameter();
data.SetSecondPassCallback(setWeakFunction1);
std::cout << v->n << " Collector\n";
delete[] v->ptr;
delete v;
}
void getIndex(const FunctionCallbackInfo<Value> &args) {
Dyn *d = new Dyn;
float *ptr = new float[amount];
for (size_t i = 0; i < amount; ++i) {
ptr[i] = i + 2;
}
auto isolate = Isolate::GetCurrent();
HandleScope scope(isolate);
Local<ArrayBuffer> ab =
ArrayBuffer::New(isolate, ptr, amount * sizeof(float));
Persistent<ArrayBuffer> pab(isolate, ab);
pab.SetWeak(d, setWeakFunction, WeakCallbackType::kInternalFields);
pab.MarkIndependent();
args.GetReturnValue().Set(ab);
}
void RegisterModule(Local<Object> exports, Local<Object>) {
auto isolate = Isolate::GetCurrent();
exports->Set(String::NewFromUtf8(isolate, "getIndex"),
FunctionTemplate::New(isolate, getIndex)->GetFunction());
}
NODE_MODULE(commander, RegisterModule)
这段代码对我来说有些尴尬。
由于有一个计数器,我希望,为我创建的每个setWeakFunction
存储调用Persistence
。当浮点数小于10000时,它会调用每个持久单元格。但是当浮动的大小变为100 000
时,它不会尝试处理任何对象,直到有1Gb的内存被吃掉,然后它会不断移除,但会留下2-3个对象。
我有一个想法,垃圾收集器为一堆对象调用WeakCallback
一次,但没有找到信息,确认了这一点。
更糟糕的是,我从未见过任何垃圾收集调用1000 000
浮点数组。
如何正确处理此数组?
答案 0 :(得分:0)
让我尝试修复上面的代码:
struct Dyn {
Persistent<ArrayBuffer> pab;
float *ptr;
int n;
};
void setWeakFunction(const WeakCallbackInfo<Dyn> &data) {
auto *v = data.GetParameter();
std::cout << v->n << " Collector\n";
v->pab.Reset();
delete[] v->ptr;
delete v;
}
void getIndex(const FunctionCallbackInfo<Value> &args) {
Dyn *d = new Dyn;
float *ptr = new float[amount];
for (size_t i = 0; i < amount; ++i) {
ptr[i] = i + 2;
}
auto isolate = args.GetIsolate();
HandleScope scope(isolate);
Local<ArrayBuffer> ab =
ArrayBuffer::New(isolate, ptr, amount * sizeof(float), ArrayBufferCreationMode::kExternalized);
d->pab.Reset(isolate, ab);
d->pab.SetWeak(d, setWeakFunction, WeakCallbackType::kParameter);
d->pab.MarkIndependent();
args.GetReturnValue().Set(ab);
}
void RegisterModule(Local<Object> exports, Local<Object>) {
auto isolate = Isolate::GetCurrent();
exports->Set(String::NewFromUtf8(isolate, "getIndex"),
FunctionTemplate::New(isolate, getIndex)->GetFunction());
}
NODE_MODULE(commander, RegisterModule)