ID: 19971 Comment by: [EMAIL PROTECTED] Reported By: [EMAIL PROTECTED] Status: Closed Bug Type: *Directory/Filesystem functions Operating System: any PHP Version: 4.3.0-dev New Comment:
Please reopen. PHP 4.2.2 and 4.2.1 appeared to cause delays as well but PHP 4.3.0 made Squirrelmail unusable. phpMyAdmin appeared to be affected as well. Downgrading to PHP 4.0.6 resolved problem. Not clear if this file() function is culprit, but system load remained low and Cyrus and MySQL do not appear to be culprit of the application-level slowdown. (Command line clients do not experience problems.) NOTE: This does NOT appear to be resolved by CVS snapshot as of 2002 01-23, which is contrary to above PHP bug! Additional information: Gentoo Linux 1.2, nightly update (gcc 2.95) Cyrus IMAPd 2.1.11 MySQL 3.23.54a PHP 4.3.0, 4.2.2, 4.2.1 SquirrelMail 1.2.10 phpMyAdmin 2.3.2 (Gentoo rev 1) Please also see http://bugs.gentoo.org/show_bug.cgi?id=14513 Previous Comments: ------------------------------------------------------------------------ [2002-10-18 15:40:14] [EMAIL PROTECTED] This bug has been fixed in CVS. In case this was a PHP problem, snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. In case this was a documentation problem, the fix will show up soon at http://www.php.net/manual/. In case this was a PHP.net website problem, the change will show up on the PHP.net site and on the mirror sites in short time. Thank you for the report, and for helping us make PHP better. ------------------------------------------------------------------------ [2002-10-18 09:59:58] [EMAIL PROTECTED] I got the following times from a tests I've run on PHP. The test involved openning a 2.5 meg binary file 1000 times. The results are everages of several runs. file_get_contents() - 30.4 seconds (4.3 HEAD) file() - 99.2 seconds (4.3 HEAD) file() - 40.3 seconds (4.2.3) Looks like a VERY serious performance loss to me, I'd even go as far as to say this is a critical issue that should be resolved before release. For reference perpouses a simple C program that freads() entire file to memory took only 18.5 seconds to run (1000 runs on the same file). ------------------------------------------------------------------------ [2002-10-18 07:04:36] [EMAIL PROTECTED] fgets() is fast. yohgaki@dev DEV]$ cat t.php <?php $filename = '/var/log/httpd/error_log.1'; require("Benchmark/Timer.php"); $time = new Benchmark_Timer; $time -> setMarker('Start'); $fp = fopen($filename,'r'); for ($i = 0; $i<100; $i++) $s = explode("\n", fread($fp, filesize($filename))); fclose($fp); $time -> setMarker('fread'); for ($i = 0; $i<100; $i++) $s = file($filename); $time -> setMarker('file'); for ($i = 0; $i<100; $i++) $s = file_get_contents($filename); $time -> setMarker('file_get_contents'); $fp = fopen($filename,'r'); for ($i = 0; $i<100; $i++) $s = fgets($fp,filesize($filename)); $time -> setMarker('fgets'); fclose($fp); [yohgaki@dev DEV]$ ./sapi/cli/php t.php ------------------------------------------------------------------------- marker time index ex time perct ------------------------------------------------------------------------- Start 1034942600.41311100 - 0.00% ------------------------------------------------------------------------- fread 1034942600.43045000 0.017338991165161 2.68% ------------------------------------------------------------------------- file 1034942600.95939400 0.52894401550293 81.66% ------------------------------------------------------------------------- file_get_contents 1034942601.04506900 0.085675001144409 13.23% ------------------------------------------------------------------------- fgets 1034942601.06049200 0.015423059463501 2.38% ------------------------------------------------------------------------- Stop 1034942601.06084500 0.00035297870635986 0.05% ------------------------------------------------------------------------- total - 0.64773404598236 100.00% ------------------------------------------------------------------------- [yohgaki@dev DEV]$ ------------------------------------------------------------------------ [2002-10-18 06:50:52] [EMAIL PROTECTED] Damn Mozilla wont work with buffer normally :( Lets try again. Problem: read from a text file into array 1. using fread()+explode() 2. using file() Here my tests <?php require("Benchmark/Timer.php"); $time = new Benchmark_Timer; $time -> setMarker('Start'); $fp = fopen("access.log", "r"); $s = explode("\n", fread($fp, filesize("access.log") ) ) ; fclose($fp); $time -> setMarker('fread+explode'); $s = file("access.log"); $time -> setMarker('file'); $time -> setMarker('Stop'); $time -> display(); ?> And results --------------------------------------------------- time index ex time % Start 1034941339.44905500 - 0.00% fread+explode 1034941340.05736200 0.608307 34.72% file 1034941341.20114900 1.143787 65.28% Stop 1034941341.20128500 0.000136 0.01% total - 1.752230 100.00% --------------------------------------------------- Is it right? I dont think so. ------------------------------------------------------------------------ [2002-10-18 06:25:17] [EMAIL PROTECTED] file_get_contents() is alow slow. It's better than file(), though. [yohgaki@dev DEV]$ cat t.php <?php $filename = '/var/log/httpd/error_log.1'; require("Benchmark/Timer.php"); $time = new Benchmark_Timer; $time -> setMarker('Start'); $fp = fopen($filename,'r'); for ($i = 0; $i<100; $i++) $s = fread($fp, filesize($filename)); fclose($fp); $time -> setMarker('fread'); for ($i = 0; $i<100; $i++) $s = file($filename); $time -> setMarker('file'); for ($i = 0; $i<100; $i++) $s = file_get_contents($filename); $time -> setMarker('file_get_contents'); $time -> setMarker('Stop'); $time -> display(); ?> [yohgaki@dev DEV]$ ./sapi/cli/php t.php ------------------------------------------------------------------------- marker time index ex time perct ------------------------------------------------------------------------- Start 1034940250.73024800 - 0.00% ------------------------------------------------------------------------- fread 1034940250.74181700 0.011569023132324 1.86% ------------------------------------------------------------------------- file 1034940251.26557900 0.52376198768616 84.25% ------------------------------------------------------------------------- file_get_contents 1034940251.35169600 0.086117029190063 13.85% ------------------------------------------------------------------------- Stop 1034940251.35192900 0.00023293495178223 0.04% ------------------------------------------------------------------------- total - 0.62168097496033 100.00% ------------------------------------------------------------------------- ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/19971 -- Edit this bug report at http://bugs.php.net/?id=19971&edit=1
