From: phpbugs at musiclogistics dot net
Operating system: Windows 7
PHP version: 5.4.14
Package: Date/time related
Bug Type: Bug
Bug description:microtime regression - resolution reduced to 64 ticks per second
Description:
------------
Probably caused by recent patch for bug #64370:
Since v 5.4.14 microtime() only moves forward in 15,6 ms (1/64 sec)
increments on Win7. Same for CLI and Apache 2.2 SAPI.
Build: VC9 x86 Thread Safe (2013-Apr-10 22:55:28) from windows.php.net.
Behaviour normal after downgrade to 5.4.13.
This also breaks usleep() (only sleeping for multiples of 15,6 ms now) and
uniqid() (returning the same value for 15,6 ms with $more_entropy = false).
Test script:
---------------
for ($startTimeMs = currentTimeMs(), $i = 0; $i < 10000; $i++) {
//usleep(1);
echo (currentTimeMs() - $startTimeMs) . ' ';
}
function currentTimeMs() {
return round(microtime(true) * 1000000);
}
Expected result:
----------------
[what PHP 5.4.13 prints on the same machine:]
13 28 35 41 48 54 61 67 74 80 86 92 99 105 112 118 124 131 137 143 149 155
162 168 174 181 187 193 200 206 212 218 224 [...and so on]
Actual result:
--------------
0 0 0 0 0 0 0 0 0 [many more zeroes] 15600 15600 15600 15600 [...] 31200
31200 31200 31200 31200 [...] 46800 46800 46800 46800 46800 [...and so on]
--
Edit bug report at https://bugs.php.net/bug.php?id=64633&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64633&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64633&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64633&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64633&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64633&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64633&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64633&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64633&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64633&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64633&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64633&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64633&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64633&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64633&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64633&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64633&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64633&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64633&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64633&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64633&r=mysqlcfg
