From:             CaptSushekECF at aol dot com
Operating system: Apache
PHP version:      5.0.5
PHP Bug Type:     Unknown/Other Function
Bug description:  sleep() not always accurate

Description:
------------
When running sleep(), I noticed it does not always pause the script for
the exact amount of time.  Although the difference is no doubt
neglectible, it is still noteable.

Reproduce code:
---------------
<?php $st = array_sum (explode (' ', microtime ()));

sleep (1);

echo round ((array_sum (explode (' ',microtime ())) - $st), 7); ?>

Expected result:
----------------
I expect to see values ranging around 1.0000001 to 1.01 (depending on
lag).

Actual result:
--------------
It returned the following: (including server lag)

0.9998388
0.9999161
1.001672

-- 
Edit bug report at http://bugs.php.net/?id=35355&edit=1
-- 
Try a CVS snapshot (php4):   http://bugs.php.net/fix.php?id=35355&r=trysnapshot4
Try a CVS snapshot (php5.0): 
http://bugs.php.net/fix.php?id=35355&r=trysnapshot50
Try a CVS snapshot (php5.1): 
http://bugs.php.net/fix.php?id=35355&r=trysnapshot51
Fixed in CVS:                http://bugs.php.net/fix.php?id=35355&r=fixedcvs
Fixed in release:            http://bugs.php.net/fix.php?id=35355&r=alreadyfixed
Need backtrace:              http://bugs.php.net/fix.php?id=35355&r=needtrace
Need Reproduce Script:       http://bugs.php.net/fix.php?id=35355&r=needscript
Try newer version:           http://bugs.php.net/fix.php?id=35355&r=oldversion
Not developer issue:         http://bugs.php.net/fix.php?id=35355&r=support
Expected behavior:           http://bugs.php.net/fix.php?id=35355&r=notwrong
Not enough info:             
http://bugs.php.net/fix.php?id=35355&r=notenoughinfo
Submitted twice:             
http://bugs.php.net/fix.php?id=35355&r=submittedtwice
register_globals:            http://bugs.php.net/fix.php?id=35355&r=globals
PHP 3 support discontinued:  http://bugs.php.net/fix.php?id=35355&r=php3
Daylight Savings:            http://bugs.php.net/fix.php?id=35355&r=dst
IIS Stability:               http://bugs.php.net/fix.php?id=35355&r=isapi
Install GNU Sed:             http://bugs.php.net/fix.php?id=35355&r=gnused
Floating point limitations:  http://bugs.php.net/fix.php?id=35355&r=float
No Zend Extensions:          http://bugs.php.net/fix.php?id=35355&r=nozend
MySQL Configuration Error:   http://bugs.php.net/fix.php?id=35355&r=mysqlcfg

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