on delay vs off delay

Original URL: http://lysongzi.com/2016/01/30/iOS-%E5%BB%B6%E8%BF%9F%E6%93%8D%E4%BD%9C%E6%96%B9%E6%B3%95%E6%80%BB%E7%BB%93/In practical applications, sometimes we need to delay some operations, so we summarize four methods of delaying operation, and briefly analyze the similarities and differences of each method.Related Methods of NSObjectThe first method is to use the method of the NSObject class performSelector:withObject:afterDelay: , which specifie

Unity Delay method Invoke and InvokerepeatingThere are two built-in delay methods inside the monobehaviour string float float void ; MethodName: Method name time: How many seconds to execute repeatrate: repeat Intervalstring float void ; MethodName: Method name time: How many seconds to executeThere are two important ways to do this: Isinvoking: Used to determine if a method is delayed and is about to b

memory delay time, the faster the computer can read data from memory, and the higher the performance of the computer. This rule applies both to systems based on Intel and AMD processors. Because there is no lower latency than 2-2-2-5, the international Memory Standards Organization believes that the 0 or 1 latency cannot be achieved with today's dynamic memory technology. In general, we use 4 consecutive Arabic numerals to denote a memory

Article from: http://blog.sina.com.cn/s/blog_77051ec50101br8g.html It is often necessary to do some delay processing in Linux shell scripts.So you often use sleep or usleep functions.Here's a look at the difference between sleep and usleep: Sleep: Default in seconds. Usleep: The default is in microseconds. 1s = 1000ms = 1000000us Sleep can specify not only the seconds, but also the deferred units, for example: Sleep 1s indicates a second

insert data, this cycle defaults to 1 seconds, and also from the library in the background to perform a monitoring command, and the main library to maintain a consistent cycle + 0.5S (default 0.5S delay check) to compare, copied over the TS value of the record and the same TS value on the main library, the difference of 0 means no delay, the greater the difference means the more the number of seconds

name resolution service caused many problems, my actual engineering practice encountered the most common problem is the choice of domain Name Service provider quality is not good or the client itself set the domain name resolution service address error causes the domain name resolution slow or failure. However, there is now a small DNS cache for most HTTP clients to save the IP addresses of recently visited sites, which can effectively mitigate this problem. Once the connection is establi

Summary of common delay methodsThis paper lists four methods of delaying execution of a function and some differences. If the delay is 1 seconds, execute the following method.-(void) Delaymethod {NSLog (@ "execute");}1.performSelector Method:(There is no such method in Swift because this method is considered unsafe in swift)[Self performselector: @selector (Delaymethod) withobject:nil afterdelay:1.0f];This

been able to establish (directly hang CS phone), the end of the hanging.Repeated tracking, search, finally found StackOverflow on a few problems and this correlation, hint is to use audioqueue, did not expect there is a pit.Code integration found that the problem is solved, but the quality of the lag, and the previous algorithm is completely unable to compare.Analysis, it is found that Audioqueue report data has a delay. Depending on the size of the

GCD and Delay callsPosted by Wang Wei (@ONEVCAT) on 2015/05/13The sample code in this section needs to be run in the Xcode project environment because Playground cannot be dispatched in a thread without special configuration. The correct results may not be available in the Playground.GCD is a very convenient way to use multithreading. By using GCD, we can make flexible multithreaded programming in the context of ensuring that the syntax is as simple a

1. Now the business logic is to update a data state to 2 and then to count the data with a status of 2. Due to MySQL master-slave delay, data is sometimes accurate and sometimes inaccurate 2. The updated data and statistics are logically together and cannot be separated. For example, I just saved the money, the table field status changed to 2. Then I need to sum up immediately, the user total amount of money, to ensure that the user total money is cor

This paper illustrates the method of the original JavaScript to realize the delay loading of the picture. Picture delay loading is actually a jquery plugin and the loading method is very simple and reasonable, but some friends feel that the load jquery plug-in package is too large, when they wrote a, to share with you. First of all, the picture delay loading can

Speaking of the delay in the program, you will think of how to do, new open a thread? If my program uses only a single thread and wants to have the function wait 10 seconds to return the value, and not be able to handle other messages as it does with the sleep function? I'm here to summarize some of the delays I can see in the forum. In addition, the main is the study of other people's sources, copyright is not in me, if this article for everyone, pl

The wind station delays loading pictures in long pages. Pictures outside the viewable area of the browser are not loaded until the user scrolls the page to their location. This is exactly the opposite of how the picture is preloaded. Delaying loading of pictures in long pages that contain many large pictures can speed up page loading. The browser will enter the ready state after the visible picture is loaded. In some cases, it can also help reduce server burdens. Some WordPress themes also have

) | // you need to adjust the window to maximize the throughput.Tcp_in_quickack_mode (SK) |(Ofo_possible // receives out-of-order packetsSkb_peek ( TP-> out_of_order_queue ))){Tcp_send_ack (SK );} Else {Tcp_send_delayed_ack (SK );}}In general, the above functions implement the ACK suggestions for rfc1122 and rfc2581.Doesn't it mean that ack can be sent with the producer when sending data? Indeed, Ack is sent whenever data is sent, but data is sent at the application layer. What if the applicati

_content = $ ('. Tab-content ', $tab _toggle);$lis. On (' MouseOver ', function () {var $this = $ (this),i = $this. Index () +1;$this. addclass (' current '). Siblings (). Removeclass (' current ');$tab _content.html (' content area ' +i);});}) The delay effect of the mouse sliding switch tab, to each mouse mouseover to add a timer, for the delay, every time the mouse mouseoutTurn

Sometimes a few seconds delay when using the touchpad, but this is not a failure, but rather the smart sense feature that the touchpad sets to prevent the touchpad from being accidentally typed. If you do not need this feature, you can cancel it by operation. Open the computer's control Panel. Turn the view to large icon and select mouse option. Click on the "Appliance Settings" tab to select "Smart Sense" and click on the Pinion shape setting icon.

Source: VBS SHOP The first method: Ping 127.0.0.1-n 5000>nul Dir c:\ >c:\1.txt 5 minutes delay to execute dir c:\ The second method :: sleep.bat-sleep/delay/wait N seconds :: Herbert Kleebauer (Germany)-2005/05/29 :: Modified by would sort-2005/06/02 @echo off echo Q | Debug>nul echo Bj@jzh ' 0x-'/ppppppa (DE (DM) ("Do" ("Dh" (Ls () (LX) (lezrr]eeeuyrx2dx=>s

The first method: Ping 127.0.0.1-n 5000>nul Dir c:\ >c:\1.txt 5 minutes delay to execute dir c:\ The second method :: sleep.bat-sleep/delay/wait N seconds :: Herbert Kleebauer (Germany)-2005/05/29 :: Modified by would sort-2005/06/02 @echo off echo Q | Debug>nul echo Bj@jzh ' 0x-'/ppppppa (DE (DM) ("Do" ("Dh" (Ls () (LX) (lezrr]eeeuyrx2dx=>sleep.com Echo 0dx

rectangle root not on my mouse speed, was left behind, no longer follow me away.The ideal state, should be I drag the faster, the rectangle is small, also should have no time difference has been following my mouse to go to AH.Although it's a little bit slower to follow, I can't stand the experience anyway.I tested it to see if there was a slight delay in the canvas.setleft.The guesswork is that the mouse moves and sets the position of two tasks, the

Var cSecPerFrame: Number = 0.05;Function Delay (timeDelay: Number, secPerFrame: Number): Void{Var startTime: Number = fig ()/1000 ;;Var tmpTime: Number = startTime;Trace (tmpTime );While (tmpTime {If (tmpTime + secPerFrame) {TmpTime = fig ()/1000;Trace (tmpTime );}}}Delay (5, cSecPerFrame );Trace ("OK "); Haha, if Old Tang is used for a new drug, Delay can be us