execution-time

Is there a command in java to measure the execution time?

这一生的挚爱 提交于 2019-12-05 17:28:22
Is there a command in java to measure the execution time ? Something like System.out.println(execution.time); in the end of the code. RoflcoptrException Here is a complete and little modified example on how you could do that: public class ExecutionTimer { private long start; private long end; public ExecutionTimer() { reset(); start = System.currentTimeMillis(); } public void end() { end = System.currentTimeMillis(); } public long duration(){ return (end-start); } public void reset() { start = 0; end = 0; } public static void main(String s[]) { // simple example ExecutionTimer t = new

Does the gcc -g debugging flag affect program execution?

守給你的承諾、 提交于 2019-12-05 15:56:19
问题 I've just been testing a program I'm working, and I see that it's executing 3μs faster (a statistically significant change) when I compile it with -g. This makes no sense to me - I thought that the -g flag wasn't supposed to affect the program execution, and that even if it did it would make it run slower, not faster. Can anyone tell me why this is happening? And whether it changes the programs execution flow? I am not compiling with -O because I need it to execute exactly as written, but if

What is considered a long execution time?

拜拜、爱过 提交于 2019-12-04 22:49:36
I am trying to figure out the efficiency of my server side code. Using microtime(true) to measure speed, I am able to calculate the time it took my script to run. I am getting average speeds of .3 to .5 seconds. These scripts do a number of database queries to return different values to the user. What is considered an efficient execution time for PHP scripts that will be run online for a website? I know it depends on exactly what is being done, but just consider this a standard script that reads from a database and returns values to the user. I look at Google and see them search the internet

PHP maximum execution time

百般思念 提交于 2019-12-04 15:33:28
In my Plesk 11, PHP 5.4.7. Apache/2.4.3 system, when I make cron jobs I get this error from error.log file. [Tue Mar 19 21:33:18 2013] [warn] [client 88.44.55.66] mod_fcgid: read data timeout in 45 seconds [Tue Mar 19 21:33:18 2013] [error] [client 88.44.55.66] Premature end of script headers: index.php So I checked for execution time with this: echo ini_get('max_execution_time'); I got this value: 1560000 It doesn't seem a timeout problem but I get timeout error? Answer for the future reference: Edit /etc/httpd/conf.d/fcgid.conf file with vim. Change FcgidIOTimeout 45 to FcgidIOTimeout 600 .

How to estimate method execution time?

偶尔善良 提交于 2019-12-04 14:26:11
问题 I have requirement to cancel method execution if it takes the more than two seconds to complete and restart it on another thread. So, is there any way/call back mechanism/HACK, I can make method inform me that it crossed 2 seconds time limit? 回答1: check if network drive exists with timeout in c# https://web.archive.org/web/20140222210133/http://kossovsky.net/index.php/2009/07/csharp-how-to-limit-method-execution-time Async Pattern: public static T SafeLimex<T>(Func<T> F, int Timeout, out bool

Problem with function session_start() (works slowly)

冷暖自知 提交于 2019-12-04 07:10:43
I have a problem wtih session_start() on primary server. When I load page for the first time, it takes less than 1 second to complete request. If I'll wait for approximately 12-15 seconds and then reload page, time of loading will be the same. But when I'm trying to refresh page after, for example, 3 or 5 seconds after initial loading, time of the server's response equals 10 seconds. I made some tests to define a bottleneck in my script and I found out, that function session_start() executes for 9.8 seconds. I'm using PEAR package HTTP_Session2. Here is code snippet: HTTP_Session2::useCookies

mysql query execution time - can i get this in milliseconds? [duplicate]

故事扮演 提交于 2019-12-04 02:05:20
Possible Duplicate: how to get load time in milliseconds or microseconds in mysql I'm comparing a few different approaches to getting some data in mysql, directly at the console, using the SQL_NO_CACHE option to make sure mysql keeps running the full query every time. Mysql gives me the execution time back in seconds, to two decimal places. I'd really like to get the result back in milliseconds (ideally to one or two decimal places), to get a better idea of improvements (or lack of). Is there an option i can set in mysql to achieve this? thanks, max Xeoncross The answer is to enable the mysql

Mathematica execution-time bug: symbol names

丶灬走出姿态 提交于 2019-12-04 00:01:59
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? Daniel Lichtblau What causes this? Is it a hashing problem? Yes, more or less. Is it fixed in Version 8? Yes (also more or less). That is to say, it is

Getting the actual (absolute) execution time of the last query in PHP (excluding network latency etc)

亡梦爱人 提交于 2019-12-03 20:15:40
问题 I want to get the actual Mysql query execution times while they run in my project so running PHP microtime() before and after and subtracting won't work. When we run a query in command line, the result displays the timing information something like this:- xxx rows affected in YY sec How to get the same time information using PHP. I searched in PHP's Mysql functions in other SO question Here,and here but did not get anything similar. Is there no such PHP function like mysql_error() , mysql

How to estimate method execution time?

烂漫一生 提交于 2019-12-03 09:12:45
I have requirement to cancel method execution if it takes the more than two seconds to complete and restart it on another thread. So, is there any way/call back mechanism/HACK, I can make method inform me that it crossed 2 seconds time limit? Aseem Gautam check if network drive exists with timeout in c# https://web.archive.org/web/20140222210133/http://kossovsky.net/index.php/2009/07/csharp-how-to-limit-method-execution-time Async Pattern: public static T SafeLimex<T>(Func<T> F, int Timeout, out bool Completed) { var iar = F.BeginInvoke(null, new object()); if (iar.AsyncWaitHandle.WaitOne