event-loop

问题 I am trying to implement a generic BLE interface that will run on OS/X and talk to a BLE peripheral device. The peripheral is very complex: It can be queried, sent hundreds of different commands, offers notifications, etc. I need to be able to connect to it, send it commands, read responses, get updates, etc. I have all of the code I need but am being frustrated by one thing: From the limited information I can find online, it looks like the only way to make CoreBluetooth's delegate callbacks

问题 When using Javascript promises, does the event loop get blocked? My understanding is that using await & async, makes the stack stop until the operation has completed. Does it do this by blocking the stack or does it act similar to a callback and pass of the process to an API of sorts? 回答1: When using Javascript promises, does the event loop get blocked? No. Promises are only an event notification system. They aren't an operation themselves. They simply respond to being resolved or rejected by

来源： https://stackoverflow.com/questions/62562845/any-example-proving-microtask-is-executed-before-rendering

来源： https://stackoverflow.com/questions/62562845/any-example-proving-microtask-is-executed-before-rendering

来源： https://stackoverflow.com/questions/62562845/any-example-proving-microtask-is-executed-before-rendering

来源： https://stackoverflow.com/questions/53304695/python-invoke-a-process-pool-without-blocking-the-event-loop

问题 I am faced with the mention of render queue in different articles (example, example) Both authors say that render callback is given the highest priority Is it true? Does render queue exist as separate queue or is it alias for render callbacks? Which callbacks are render? As I take in any repaint is render callback Are there any other types of queues and if there are where can I read about them? In w3.org we can read tasks from different task sources may be placed in different task queues But

问题 How does the Call Stack behave when async/await functions are used ? const asyncFuntion=async()=>{ //some asynchronous code } const first = async()=>{ await asyncFuntion(); console.log('first completed'); debugger; } const second = ()=>{ console.log('second completed'); debugger; } function main(){ first(); second(); } main(); In the above code, when the first breakpoint is encountered in second(), I could see that the call stack contained main() and second(). And during the second breakpoint

问题 const b = () => { return new Promise(resolve => { resolve(); Promise.resolve() .then(() => { console.log(1); }) .then(() => console.log(3)); }); }; const a = async () => { await b(); console.log(2); }; a(); Different behavior on safari , chrome(firefox), any standard described about this ? 回答1: You have two completely independent promise chains here: Promise.resolve() .then(() => { console.log(1); }) .then(() => console.log(3)); (async () => { await new Promise(resolve => { resolve(); });

问题 I have a simple piece of code driving me crazy for a while. I have posted this question some days ago asking create_task is not working with input . Now I have figured out something related to this. I am running event loop in a separate thread and pushing tasks in it. Very straight forward code. import asyncio import threading async def printer(message): print(f'[printer] {message}') def loop_runner(loop): loop.run_forever() if __name__ == '__main__': event_loop = asyncio.get_event_loop() t =