Edit report at https://bugs.php.net/bug.php?id=55221&edit=1
ID: 55221 Updated by: ras...@php.net Reported by: osmanungur at gmail dot com Summary: shell_exec works very slow with Apache -Status: Open +Status: Bogus Type: Bug Package: Performance problem Operating System: Mac OS X 10.6.8 PHP Version: 5.3.6 Block user comment: N Private report: N New Comment: There really isn't anything we can do about that. When you run something from the command line your shell is already running and ready to go. When you do it from within PHP via any of those calls you need to fork and then exec the shell executable first and then run the command. That is a huge amount of overhead, especially if you are low on ram. To avoid the fork+exec overhead you should use some sort of pre-forking mechanism and simply pass messages to the already running job worker. You can roll your own, but I would suggest looking at something like Gearman instead. Previous Comments: ------------------------------------------------------------------------ [2011-07-17 12:56:31] osmanungur at gmail dot com Description: ------------ Running commands with shell_exec in browser is working very slower than CLI. I'm having same problem with system() and proc_open(). Running from shell takes 0.11 sec, but running from browser takes 16.96 second. I tested out same code in Linux Ubuntu, same problem happens. CLI ------------ float(0.11125087738037) string(211) "graph_left = 67 graph_top = 33 graph_width = 800 graph_height = 200 image_width = 882 image_height = 273 graph_start = 1310835249 graph_end = 1310921349 value_min = 0.0000000000e+00 value_max = 1.1000000000e+00 " Browser / Apache ------------ float 16.960417032242 string 'graph_left = 67 graph_top = 33 graph_width = 800 graph_height = 200 image_width = 882 image_height = 273 graph_start = 1310834364 graph_end = 1310920464 value_min = 0.0000000000e+00 value_max = 1.1000000000e+00 ' (length=211) Test script: --------------- <?php $start = microtime(1); $output = shell_exec($executor->getCommandString()); $end = microtime(1); var_dump($end - $start, $output); ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=55221&edit=1
