混合并发:: parallel_for和异步任务

Question

Is it "ok" to create tasks with parallel_for ?

concurrency::concurrent_vector<concurrency::task<void>> tasks;
concurrency::parallel_for(0, length, [tasks](int i) {
    tasks.push_back(Upload_Async(i));
});
concurrency::when_all(tasks.begin(), tasks.end()).wait();

Answer 1

If Upload_Async is truly asynchronous, then it just starts the task and returns it, it doesn't do any of the work itself. That means that using parallel_for here does not make any sense, it won't speed up your code, it only adds overhead.