execution-time

问题 Is it possible to have a loop which has a zero execution time? I would think that even an empty loop should have an execution time since there is an overhead associated with it. 回答1: Yes, under the as-if rule the compiler is only obligated to emulate the observable behavior of the code, so if you have a loop that does not have any observable behavior then it can be optimized away completely and therefore will effectively have zero execution time. Examples For example the following code: int

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . When I try to go phpMyadmin I get this error Fatal error: Maximum execution time of 30 seconds exceeded in C:\xampp\phpMyAdmin\libraries\session.inc.php on line 108 回答1: Bobox, You are editing the wrong php.ini file. There are 2 php.ini files. One is in \xampp\php\php.ini , this

问题 I have a script that runs a function for a set of data that is drawn from a master sheet. Each time the function runs, it draws and processes a data set based on a date designated in a cell in a sheet (cell A3). The date in this cell is updated via a 'for' loop for a date range that I specified. the script can execute 5 complete runs (aka each run execute the function for a day worth of data) of these loops before I run into "Exceeded maximum execution time" some time during the 6th run. All

问题 There is a strange bug that has been in Mathematica for years, at least since version 5.1, and persisting through version 7. Module[{f, L}, L = f[]; Do[L = f[L, i], {i, 10^4}]] // Timing {0.015, Null} Module[{weirdness, L}, L = weirdness[]; Do[L = weirdness[L, i], {i, 10^4}]] // Timing {2.266, Null} What causes this? Is it a hashing problem? Is it fixed in Version 8? Is there a way to know what symbol names cause a slowdown, other than testing? 回答1: What causes this? Is it a hashing problem?

问题 As we know, for VoIP app, we can use Pushkit to active the app. However, It gives us only max to 30s to execute our code. After the execution time, the app is suspended. I found none method is called before it's suspend, thus, I can not do something to clear my resources. Who can help me? 来源： https://stackoverflow.com/questions/44279376/when-pushkit-wake-up-app-how-can-i-know-the-execution-time-is-finished

问题 I have a jsonp ajax call which got executed and returns the data to my main function. This is done in the success function by calling that.mainfunction(newData); That means that the main function is called the second time and I think that I'm running therfore in a time/execution problem. While running in the first iteration newData is empty and gets returned empty to the main function. The main function by this framework I must use. So another control is trying to invoke the getter which is

问题 Is there any way by which i can calculate the time that would take for a set of Mysql Queries to execute, may be based on the number of records or something, before executing the query? 回答1: No. There are many factors that go into how long a query takes to execute, including: Hardware specs Network configuration, bandwidth, and load MySQL Server configuration and server load MySQL index usage and execution plan Size of data Size of index Size of result set The best way to determine how long a

问题 I'm using phpMailer for sending emails from localhost, but I have had to do a quick fix to its main class to get it working. When I just downloaded phpmailer and used it, i got a max execution time error in my script: Fatal error: Maximum execution time of 30 seconds exceeded in /home/lol/desktop/web/mailtest/class.phpmailer.php on line 737 So, i went to line 737 in class.phpmailer.php and found a function to validate address: public static function ValidateAddress($address) { if ((defined(

问题 I have the following problem Under what circumstances can multiplication be regarded as a unit time operation? But I thought multiplication is always considered to be taking unit time. Was I wrong? 回答1: It depends on what N is. If N is the number of bits in an arbitrarily large number, then as the number of bits increases, it takes longer to compute the product. However, in most programming languages and applications, the size of numbers are capped to some reasonable number of bits (usually

问题 I have a PHP page that I run every minute through a CRON job. I have been running it for quite some time but suddenly it started throwing up these errors: Maximum execution time of 30 seconds exceeded in /home2/sharingi/public_html/scrape/functions.php on line 84 The line number will vary with each error, ranging from line 70 up into the 90s. Here is the code from lines 0-95 function crawl_page( $base_url, $target_url, $userAgent, $links) { $ch = curl_init(); curl_setopt($ch, CURLOPT