ID: 29922 Updated by: [EMAIL PROTECTED] Reported By: info at pion dot xs4all dot nl -Status: Open +Status: Feedback Bug Type: *Directory/Filesystem functions Operating System: Linux PHP Version: 5.0.1 New Comment:
I'm sure there is already a bugreport for this, and afaik somebody also worked on an attempt to fix it. Can you try a PHP 5.1.0-dev snapshot please? (http://naps.php.net) Previous Comments: ------------------------------------------------------------------------ [2004-08-31 22:03:04] info at pion dot xs4all dot nl - The observation was on rhel 3 with php 4.3.2 - The test in the report was done on a FC1 system with php 4.3.3 - Now i have checked php 4.3.8 on fc2 (the default php) and php 5.0.1 Al have the same result although the speed diferences on the fc2 system are smaller. This could be caused by different hardware or differences in the linux vm (2.4.X versus 2.6.X) ------------------------------------------------------------------------ [2004-08-31 19:07:04] info at pion dot xs4all dot nl Description: ------------ If you copy a file of N megabytes (N in the order of a few hundred megs) your proces will use the same order of ammount of memory (or less if the system doesn't have that much). This is probably because the file is compleetly memory mapped and than the content is written to an other file. Probably it will be better to use the behavior of the unix "cp" command which reads 4k and than writes the 4k. In this way "cp" is almost a factor two faster than php and has less impact on the system performance. Reproduce code: --------------- <?php # # This assumes that there excist a big # file "/tmp/file_512m" which has 512mb # of data and that there is enough space # in "/tmp". # copy ("/tmp/file_512m", "/tmp/target") ?> Expected result: ---------------- The unix "cp" needed 1 minut 8 seconds to copy the file and php used 2 and 18 seconds on my desktop system with 512mb. Actual result: -------------- They should be in the same order ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=29922&edit=1
