event-loop

问题 This SO question & answers and DOM level3 docs states that manual events are dispatched synchronously in browsers. My question, however, relates to user-related events (real clicks), not manually triggered ones. I created a small jsfiddle demo with a button + onclick handler, the handler does some synchronous work for 2 seconds (blocking sync wait, long enough for my eye to see what's going on). Open console to see console.log s. The test . I click several times on the button. Although the

问题 Is the concept of event loop general or specific to languages? I am looking for detailed explanations with examples to clearly understand the following: 1. how it works? How/when should/can I leverage event loop in JavaScript ? Any changes introduced in ECMAScript-6/2015 regarding event loop? Update: There's no dearth of answers to this but I'm looking for an easy to understand definition with examples. Addendum: Consider the following code: var list = readHugeList(); var nextListItem =

问题 What does process.nextTick exactly mean ? Does nextTick mean, after callback queue pop for one element in the current phase ? Or before moving to the next phase after executing all callbacks in the current phase's queue ? 回答1: This is described in the documentation. nextTick queues callbacks to be invoked at the end of the current tick. The entire queue is emptied before moving to the next tick. Contrast with setImmediate, which queues callbacks to be invoked during the next tick. (Yes, the

问题 Suppose in a single threaded application, I have created a server and connected a slot with new connection arrival signal like following, connect(mTcpServer, SIGNAL(newConnection()), this, SLOT(newClientConnected())); and after this line I went into a huge loop where I do some calculations. So my single thread which is the main thread is busy in a loop and now a new connection arrives. So my questions are, 1) In which thread the new slot will be executed? I ask this because main thread is

问题 After reading a lot about NodeJS Event loop, I still have one doubt. In our code, if NodeJS runtime finds any async call, it pushes it to task/message queue which runs on a background thread and V8 keeps executing our further code on main thread. Once that async task has been finished, node checks the call stack for empty. If call stack is empty, then only node brings that callback on main thread for processing. Otherwise it has to wait till call stack is empty. Up to this point I assume, I

问题 vwait forever runs the events loop until the exit command. I have some stuff to do during each iteration of the event loop. How can I do that? 回答1: You don't. What you do is schedule regular timer events that do your work. For user interaction, 10 times a second is quite regular enough. To schedule regular timer events, use the every command from the Tcler's Wiki, like this: proc every {ms body} {after $ms [info level 0]; eval $body} every 100 { puts "I'm saying Hi ten times a second!" } That

问题 I'm getting very familiar with python's asyncio , the asynchronous programming in python, co-routines etc. I want to be able to executing several co-routines with my own custom made eventloop . I'm curious if i can write my own eventloop without importing asyncio at all 回答1: I want to be able to executing several co-routines with my own custom made eventloop. The asyncio event loop is well-tested and can be easily extended to acknowledge non-asyncio events. If you describe the actual use case

问题 I created a hard to track down bug in our code, but do not understand why it occurs. The problem occurs when pushing the same async function multiple times to call soon. It does not happen with synchronous functions. Here is a running example of the issue: import asyncio import sys class TestObj(object): def __init__(self): self.test_data = {'a': 1, 'b': 2, 'c': 3} self.loop = asyncio.get_event_loop() self.loop.call_later(1, lambda: asyncio.ensure_future(self.calling_func())) self.loop.call

问题 For the last week I read documentation about vertx. What i don't get it's how vertx handlers are work? For example public class Client extends AbstractVerticle{ @Override public void start() throws Exception { final HttpClient httpClient = this.vertx.createHttpClient(); this.vertx.setPeriodic(1000, handler->{ httpClient.getNow(8080, "localhost", "/", responseHandler -> { System.out.println("response"); }); }); } } And server is: public class JdbcVertx extends AbstractVerticle{ @Override

问题 As new member, I'm unable to comment on topics, that's why I had to create a new topic. But in this way, I can clarify the problem, so hopefully you guys can help me. I have read quite a lot about Node.js Event Loop. And I have shaped my understanding of it based on following materials: Node.js Event Loop What the heck is the event loop anyway? Why setImmediate() execute before fs.readFile() in Nodejs Event Loop's works? (Please feel free to suggest other materials which are informative and