How can I say which class of many (which all do the same job) execute faster? is there a software to measure that?
+1
A:
If it's something that can be tested outside the Web context, I just use the Unix time command.
chaos
2009-07-29 13:22:56
What about windows?
MAK
2009-07-29 17:58:36
+3
A:
For quick stuff I do this (in PHP):
$startTime = microtime(true);
doTask(); // whatever you want to time
echo "Time: " . number_format(( microtime(true) - $startTime), 4) . " Seconds\n";
You can also use a profiler like http://xdebug.org/.
Scott Saunders
2009-07-29 13:30:15
For additional accuracy, I'd suggest (a) using a loop and averaging the time and (b) using separate files for each thing you're testing. If you have several timings within one script, their order can make a difference sometimes.
DisgruntledGoat
2009-07-29 16:48:14
A:
You can use basic stuff like storing timestamps or microtime() before and after an operation to calculate the time needed. That's easy to do, but not very accurate. Maybe a better solution is Xdebug, i've never worked with it but it seems to be the best-known PHP debugger/profiler I can find.
Alex Kamsteeg
2009-07-29 13:30:44
Honestly I'm not sure what to add. [Download + install xdebug](http://www.xdebug.org/docs/install) (it's a php-extension). Then [configure it to profile your script](http://www.xdebug.org/docs/profiler#starting). This will generate a cachegrind file. You can then use webgrind to view the cachegrind file with. (Or another viewer. If you use Windows, you could use [wincachegrind](http://sourceforge.net/projects/wincachegrind/))
troelskn
2009-07-29 18:24:48
+1
A:
Zend Studio has built in support for profiling using XDebug or ZendDebugger. It will profile your code, telling you exactly how long every function took. It's a fantastic tool for figuring out where your bottlenecks are.
OverloadUT
2009-07-29 17:22:53
+1
A:
ive been using xhprof lately http://pecl.php.net/package/xhprof. It was originally developed by facebook and it comes with a decent we interface.
Jason
2009-07-30 00:16:56