ID: 22308 Updated by: [EMAIL PROTECTED] Reported By: uk at dataway dot ch -Status: Open +Status: Closed Bug Type: Performance problem Operating System: Linux 2.2.18 PHP Version: 4.3.0 New Comment:
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. Previous Comments: ------------------------------------------------------------------------ [2003-02-19 16:55:40] uk at dataway dot ch Using passthru("whatever") is almost 100 times slower than doing the equivalent $out = `whatever`;echo $out I tested this using the following program (I use dd here to generate the data, but the same results appear with any command, cat /etc/passwd etc.) <?php echo "<!--"; $start = microtime(); passthru("dd if=/dev/zero count=100"); $end = microtime(); echo "-->"; $mt = explode(' ', $start); $mts = $mt[1] + $mt[0]; $mt = explode(' ', $end); $mte = $mt[1] + $mt[0]; printf("%.3f seconds elapsed (passthru)<p>", $mte - $mts); echo "<!--"; $start = microtime(); $out = `dd if=/dev/zero count=100`; echo $out; $end = microtime(); echo "-->"; $mt = explode(' ', $start); $mts = $mt[1] + $mt[0]; $mt = explode(' ', $end); $mte = $mt[1] + $mt[0]; printf("%.3f seconds elapsed (backquotes)<p>", $mte - $mts); ?> On my machine (Pentium 400) this script outputs: 16.231 seconds elapsed (passthru) 0.266 seconds elapsed (backquotes) Quite a difference, I think. Compiled with: ./configure \ --bindir=/usr/local/apache/bin \ --libdir=/usr/local/apache/php/lib \ --with-apxs=/usr/local/apache/bin/apxs \ --with-config-file-path=/usr/local/apache/conf \ --with-exec-dir=/usr/local/apache/php/bin \ --with-pear=/usr/local/apache/php/lib \ --enable-safe-mode \ --with-openssl=/usr/local/ssl \ --with-imap=shared,/usr/local \ --enable-dbx=shared \ --enable-dio=shared \ --enable-ftp \ --with-sybase-ct=shared,/usr/local \ --with-mysql=shared,/usr/local/mysql \ --with-pgsql=shared,/usr/local/pgsql \ --with-gdbm=shared \ --with-zlib=/usr/local \ --with-gd=shared \ --enable-exif=shared \ --enable-ctype \ --with-gettext \ --with-xml=shared \ --with-expat-dir=/usr/local \ --enable-xslt=shared \ --with-xslt-sablot=/usr/local \ --enable-sockets=shared \ --enable-wddx=shared \ --enable-shmop=shared \ --enable-sysvmsg=shared \ --enable-sysvsem=shared \ --enable-sysvshm=shared ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=22308&edit=1
