timing

问题 I'm creating a p2p audio-midi streaming application using Java (unfortunately) and I'm searching for a way to provide network time synchronization between certain peers (sources) using a reliable protocol implementation (like NTP) but I can't find any related libraries to use.I also have a limited amount of time to spend in order to implement something like this myself. So, does anyone know any solutions for network time synchronization using Java, NTP or alternative protocols/methods/ideas ?

问题 Event objects passed to event handler callbacks contain an event.timeStamp of when the event occurred, but where is the timestamp produced? Is it something that bubbles up from the underlying OS, or is it generated by the browser? I'm interested in gauging the reliability of the timestamp and recognise that the later the timestamp is produced the less accurate it's likely to be. Also, does the way in which the timestamp is produced vary significantly between platforms and browser

问题 I'm trying to time how long clock_gettime(CLOCK_REALTIME,...) takes to call. "Back in the day" I used to call it once at the top of a loop since it was a fairly expensive call. But now, I was hoping that with vDSO and some clock improvements, it might not be so slow. I wrote some test code that used __rdtscp to time repeated calls to clock_gettime (the rdtscp calls went around a loop that called clock_gettime and added the results together, just so the compiler wouldn't optimize too much away

问题 I'm trying to have a SKNode move onto the screen on command. I've set up the following SKAction chain so that 1) The node moves up and offscreen, then 2) the node moves down into a starting place, then 3) starts moving around. I've used the following code to try and implement this: SKAction *moveUp = [SKAction moveTo: shipIntroSpot1 duration:3.0]; SKAction *moveDown = [SKAction moveTo:shipSpot1 duration:ship1MovementSpeed]; [self enumerateChildNodesWithName:@"ship1" usingBlock:^(SKNode *node,

问题 I'm posing this question mostly out of curiosity. I've written some code that is doing some very time intensive work. So, before executing my workhorse function, I wrapped it up in a couple of calls to time.clock(). It looks something like this: t1 = time.clock() print this_function_takes_forever(how_long_parameter = 20) t2 = time.clock() print t2 - t1 This worked fine. My function returned correctly and t2 - t1 gave me a result of 972.29 , or about 16 minutes. However, when I changed my code

问题 I have thought that variable assignments are done after all operations in a list given to sess.run, but the following code returns different results at different execution. It seems randomly run operations in the list and assign the variable after the run of the operation in the list. a = tf.Variable(0) b = tf.Variable(1) c = tf.Variable(1) update_a = tf.assign(a, b + c) update_b = tf.assign(b, c + a) update_c = tf.assign(c, a + b) with tf.Session() as sess: sess.run(initialize_all_variables)

问题 I'm using QueryPerformanceCounter to do some timing in my application. However, after running it for a few days the application seems to stop functioning properly. If I simply restart the application it starts working again. This makes me a believe I have an overflow problem in my timing code. // Author: Ryan M. Geiss // http://www.geisswerks.com/ryan/FAQS/timing.html class timer { public: timer() { QueryPerformanceFrequency(&freq_); QueryPerformanceCounter(&time_); } void tick(double

问题 Afternoon all, I am running into an issue where i need to run one function, then after that is finished, run the next, and do this for four functions, i have been at this for a while trying to find the correct syntax to layout my function calls in and cant seem to find anything to address this specific scenario. html: <div id = "putcontenthereafterajax"> </div><!--end putcontenthereafterajax--> <div id = "putfooterhereafterajax"> </div<!--end putfooterhereafterajax--> jquery: $(window).load

问题 I had a weird timing bug in my app that came from switching from Bluebird to native promises. I fixed it, but am left with this oddity: Native promises seem to wiggle their way in between nextTick and setImmediate -- how? And is this supposed to happen? Where are promises supposed to go with regard to these? ~function(){ setTimeout (console.log.bind(console, 'timeout A')); process.nextTick (console.log.bind(console, 'nextTick A')); setImmediate (console.log.bind(console, 'setImmediate A'));

问题 Is it possible, using jQuery, to fire off an event to set a div tag's text after n. seconds? Thanks! George 回答1: var doIt = function() { $("div.my").text("My message"); } setTimeout(doIt, 3000); 回答2: if you're using jQuery 1.4, you can always do: $(function() { $('#divId').delay(3000).text('New Text'); }); 回答3: I've been using the following jQuery plugins below for this. Delay can be used with chained functions, notNow can't. Delay http://plugins.jquery.com/project/delay $('#animate-this')