From: diego at caravana dot to
Operating system: Linux 2.4.21
PHP version: 5.1.4
PHP Bug Type: Performance problem
Bug description: uniqid() without more_entropy extremely slow
Description:
------------
See #37106 first.
Ok, this may be "bogus", but is there a workaround or some other unique id
generator in PHP?
I've spent 2 days trying to figure out why my webapp was *so slow* on
production server, when on develop/test environments it was acceptable...
At last, I profiled (APD) it and discovered that uniqid() was terribly
slow. I searched for some big problem in my app then, without any other
clue, I commented out the usleep() call in uniqid.c: magically, a page
that took 10 seconds now responded under 1 sec!
I tried with the following lines instead of usleep(), but with the same
problem:
struct timespec tsq;
tsq.tv_sec = 0;
tsq.tv_nsec = 1;
nanosleep(&tsq, NULL);
FYI, I "patched" PHP 5.1.4, and the server with the problem runs an
updated RHEL 3 (Linux 2.4.21-40.ELsmp).
--
Edit bug report at http://bugs.php.net/?id=37840&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37840&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=37840&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37840&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37840&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37840&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37840&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37840&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37840&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37840&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37840&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37840&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37840&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37840&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37840&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37840&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37840&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37840&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37840&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37840&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37840&r=mysqlcfg
